# ChangeLocks.net — Full Content Index Last Updated: 2026-06-03 --- # Commercial Lock Changes: The Complete Property Manager Guide URL: https://changelocks.net/ Last Updated: 2026-06-03 "> "> /images/favicon.ico?v= "> /images/icon-192.png?v= "> "> "> /images/og.jpg?v= "> "> "> "> /images/og.jpg?v= "> /images/hero.jpg?v= " as="image"> /llms.txt"> /llms-full.txt"> /images/hero.jpg?v= " srcset=" /images/hero-m.jpg?v= 820w, /images/hero.jpg?v= 1376w" sizes="100vw" alt="Property manager reviewing a key control log with a commercial locksmith in a modern office building lobby" fetchpriority="high" decoding="async" width="1376" height="768"> Updated June 2026 Commercial Lock Changes: The Complete Property Manager Guide When an employee leaves with a key or a tenant vacates a unit, businesses and property managers face the same question: rekey, replace, or upgrade? This guide covers every option from bulk rekeying to master key hierarchies, restricted keyways, and electronic access control. From $15 Per cylinder rekey (volume) 4 guides In-depth topic coverage 2026 Fully updated Read the Guide /guides/commercial-lock-change-checklist.php" class="btn btn--outline-light">Get the Checklist 4 in-depth commercial security guides Updated June 2026 Independent editorial coverage Property management and B2B focus Four guides to commercial lock security Each guide targets a specific scenario a property manager or business owner encounters when managing key access at scale. /guides/commercial-lock-change-checklist.php" class="guide-card__media" aria-label="Commercial lock change checklist"> /images/guide-checklist.jpg?v= " alt="Facilities manager completing a lock change audit checklist on a tablet in an office corridor" width="800" height="500" loading="lazy"> Lock Change Checklist A step-by-step checklist for businesses and property managers: when to rekey, when to replace, and how to document the chain of custody. /guides/commercial-lock-change-checklist.php" class="guide-card__link">Get the checklist /guides/master-key-systems.php" class="guide-card__media" aria-label="Master key systems guide"> /images/guide-masterkey.jpg?v= " alt="Commercial locksmith demonstrating a master key system hierarchy chart to a building manager" width="800" height="500" loading="lazy"> Master Key Systems How pin-tumbler master key hierarchies work, when to commission one, and the total cost of ownership vs individual keying. /guides/master-key-systems.php" class="guide-card__link">Explore master keys /guides/key-control-systems.php" class="guide-card__media" aria-label="Key control systems guide"> /images/guide-keycontrol.jpg?v= " alt="Property manager accessing a key control cabinet system with audit log entries on screen" width="800" height="500" loading="lazy"> Key Control Systems Restricted keyways, electronic key cabinets, and cloud-based key management platforms that give auditable control over every copy made. /guides/key-control-systems.php" class="guide-card__link">Learn about key control /guides/multi-unit-rekey-strategy.php" class="guide-card__media" aria-label="Multi-unit rekey strategy guide"> /images/guide-multiunit.jpg?v= " alt="Commercial locksmith rekeying entry cylinders on a row of apartment doors during a bulk rekey operation" width="800" height="500" loading="lazy"> Multi-Unit Rekey Strategy How apartment complexes, office parks, and campus facilities schedule and price bulk rekeying to minimize cost and disruption. /guides/multi-unit-rekey-strategy.php" class="guide-card__link">Plan a bulk rekey Quick Answer Businesses and property managers should change locks after every employee departure with key access, each tenant move-out, and any suspected unauthorized key duplication. The three main strategies are rekeying (cheapest, hardware stays), restricted keyways (prevents unauthorized copies), and electronic access control (eliminates rekeying entirely by deactivating credentials in software). The right strategy depends on property size, staff turnover rate, and how much key accountability you need between audits. Why do businesses need to change locks? A commercial property creates dozens of key-access events every year. Each one represents a potential security gap if not tracked and managed. The scenarios that most commonly trigger a lock change are: Employee termination or resignation where the departing employee held a physical key. Industry estimates suggest 20 to 30 percent of terminated employees do not return all issued keys. Tenant move-out at a multi-unit residential or commercial property. Even when a tenant returns all keys, lock changes between tenancies are considered best practice because copies may have been made. Lost or stolen key where the key was associated with a high-security area or master key system. A single lost master key can compromise an entire keying hierarchy. Security incident or suspected breach where access to the property is uncertain. Lease renewal or contract renegotiation as a routine security reset for commercial tenants. Trigger Recommended Action Urgency Employee with key exits Rekey or deactivate access credential Within 24 hours Tenant move-out Rekey entry cylinder, update key log Before new tenant arrives Lost key (common area) Rekey affected cylinders Immediately Lost master key Rekey entire affected keying tier Immediately Suspected unauthorized copy Rekey or upgrade to restricted keyway Within 48 hours Annual security review Audit key log; rekey as indicated Scheduled Three lock change strategies compared The right approach depends on your property size, how frequently access events occur, and how much control you need over key duplication between audits. Rekeying The locksmith removes the existing cylinder, replaces the pin tumblers to a new key cut, and the old key no longer operates the lock. The hardware stays in place. Cost: $15–$40 per cylinder in volume Best for: routine tenant and staff turnover Limitation: does not prevent copies of the new key /guides/multi-unit-rekey-strategy.php">Multi-unit rekey guide → Restricted Keyways A proprietary key profile that hardware stores cannot duplicate. Only the authorized locksmith dealer can cut new keys, giving you a documented chain of custody for every copy. Brands: Medeco, Mul-T-Lock, ASSA Abloy Control Best for: high-security areas, master key systems Limitation: higher cylinder cost; requires a vendor relationship /guides/key-control-systems.php">Key control guide → Electronic Access Control Keycards, PIN codes, or mobile credentials replace physical keys. Access is deactivated in software the moment a person's employment or tenancy ends. Cost: $300–$800+ per door (hardware + installation) Best for: high-turnover properties, audit-intensive environments Limitation: upfront investment; battery backup and network reliability required /guides/key-control-systems.php">Compare EAC options → /images/content/master-key-hierarchy.jpg?v= " alt="Commercial locksmith presenting a master key hierarchy diagram to a property manager in a conference room, pin cylinder cross-section visible on the table" width="1152" height="768" loading="lazy"> When does a master key system make sense? A master key system uses a hierarchical pin-tumbler layout so one key opens every lock on a property while individual keys open only designated doors. The economics make sense when: The property has more than 10 to 15 distinct access points Multiple personnel need tiered access (maintenance vs. management vs. executive) Carrying a full ring of individual keys creates operational friction Security audit requirements demand documented access levels The risk with master key systems is that a compromised master key requires rekeying the entire hierarchy for the affected tier. This is why most security consult --- # Commercial Lock Change Checklist URL: https://changelocks.net/guides/commercial-lock-change-checklist Last Updated: 2026-06-03 "> "> /images/favicon.ico?v= "> "> "> /images/og.jpg?v= "> "> /llms.txt"> /images/hero-checklist.jpg?v= " alt="Facilities manager reviewing a commercial lock change checklist on a tablet in an office building corridor" fetchpriority="high" decoding="async" width="1376" height="768" style="position:absolute;inset:0;width:100%;height:100%;object-fit:cover;"> /index.php">Home › /index.php#guides">Guides › Lock Change Checklist Commercial Lock Change Checklist A step-by-step guide for businesses and property managers: when to rekey, when to replace, and how to maintain a defensible key custody record. Quick Answer A commercial lock change checklist covers five phases: hardware audit, access tier mapping, strategy selection, vendor quoting, and key log update. The most commonly skipped step is the final documentation phase, which is also the phase that matters most if a security incident occurs after the change. Phase 1: Hardware audit Before calling a locksmith, document every lock on the affected property. A hardware audit takes 20 to 40 minutes for most commercial suites and gives a locksmith the information needed to quote accurately. Audit checklist Total number of doors requiring a lock change Lock grade: ANSI Grade 1 (commercial), Grade 2 (light commercial), or Grade 3 (residential) Cylinder brand: Schlage, Yale, Kwikset, Medeco, Mul-T-Lock, or other Keyway type: standard or restricted Existing master key system: yes or no; if yes, which tier level Number of keys currently issued per door (check the key log if one exists) Doors where keys were not returned at employee exit or tenant move-out Phase 2: Define access tiers Access tier mapping answers one question: who needs to open which doors? For a single-tenant office, this may be straightforward. For a multi-tenant building or campus, the map can reveal whether a master key system or a hierarchical electronic access structure is appropriate. Draw a simple grid with personnel roles or tenant categories on one axis and door locations on the other. Mark each intersection with the required access level. This document becomes the scoping brief for the locksmith or access control vendor. Phase 3: Choose a strategy Strategy Best when Not appropriate when Rekey (standard keyway) Routine tenant or staff turnover; hardware in good condition Key duplication control is a security requirement Restricted keyway upgrade Unauthorized key copies are a recurring concern; master key system is in use Budget is constrained; low-security area Full hardware replacement Locks are worn, damaged, or below required security grade Hardware is serviceable and grade meets requirements Electronic access control High staff turnover; audit-intensive environment; multi-site management Budget is limited; no IT infrastructure for credential management Phase 4: Vendor quoting Request at least two quotes from commercial locksmith vendors. A well-scoped quote should itemize the following: Mobilization or service-call fee Per-cylinder rekey or replacement cost Hardware cost if cylinders are being replaced Key cutting cost and number of keys included Any additional charge for master key system adjustments Estimated time on-site and any work-hours restrictions (e.g., off-hours premium) Volume threshold: Most commercial locksmiths offer volume pricing starting at 5 to 10 cylinders. If you have multiple units or doors to change, ask for volume pricing explicitly rather than accepting per-unit rates. Phase 5: Execute and document The final phase is where most commercial lock changes fail as a security measure: the change is made but not documented. Without documentation, an organization cannot demonstrate due diligence if a security incident occurs later. Key custody log template Lock location (door description + room/unit number) Rekey date Locksmith vendor name and technician Number of new keys cut Key recipient names and signed acknowledgment Next scheduled review date Who uses this checklist The commercial lock change protocol applies wherever physical key access needs to be tracked and controlled. /images/content/office-building.jpg?v= " alt="Multi-tenant office building with access-controlled entry lobby and keycard readers" width="800" height="500" loading="lazy"> Office buildings Multi-tenant and owner-occupied commercial office buildings managing access for dozens of employees and contractors across multiple floors. /images/content/apartment-complex.jpg?v= " alt="Residential apartment building exterior with controlled entry and numbered unit doors" width="800" height="500" loading="lazy"> Residential property management Apartment complexes and single-family rental portfolios executing move-out reckeying on every tenant transition. /images/content/retail-store.jpg?v= " alt="Retail store manager locking a commercial entrance door with a key at close of business" width="800" height="500" loading="lazy"> Retail and hospitality High-turnover environments where staff changes frequently and key access to stockrooms, offices, and safes must be tightly controlled. Checklist FAQ What should be on a commercial lock change checklist? A complete checklist covers: hardware audit (grade, brand, keying), access tier mapping, strategy selection (rekey/restricted/electronic), vendor quoting with itemized pricing, execution scheduling, and key log update. The documentation phase is the most commonly skipped and the most important. How do I document key custody during a lock change? A key custody log should record: key number, lock location, recipient name, issue date, return date (or noted as not returned), and the locksmith who performed the rekey. Physical signature on a form is more defensible than a digital entry alone in an insurance or liability context. What questions should I ask a commercial locksmith? Ask for their license number, liability insurance, experience with your hardware brand, whether they provide a key issuance log, and their volume pricing for multi-door jobs. Confirm they can rekey existing cylinders rather than replacing them, which is substantially cheaper if hardware is serviceable. Related guides /index.php" class="related-strip__card"> Commercial Lock Changes: Complete Guide The full overview: rekeying, restricted keyways, master key systems, and electronic access. /guides/master-key-systems.php" class="related-strip__card"> Master Key Systems How pin-tumbler hierarchies work and when they make economic sense for your property. /guides/key-control-systems.php" class="related-strip__card"> Key Control Systems Restricted keyways and key management platforms for auditable control over every copy. --- # Master Key Systems: How They Work, Costs & When to Use One URL: https://changelocks.net/guides/master-key-systems Last Updated: 2026-06-03 "> "> /images/favicon.ico?v= "> "> "> /images/og.jpg?v= "> "> /llms.txt"> /images/hero-masterkey.jpg?v= " alt="Close-up of a pin-tumbler cylinder being set up for a master key system on a locksmith workbench with bitting charts" fetchpriority="high" decoding="async" width="1376" height="768" style="position:absolute;inset:0;width:100%;height:100%;object-fit:cover;"> /index.php">Home › /index.php#guides">Guides › Master Key Systems Master Key Systems Explained How pin-tumbler master key hierarchies work, what they cost to commission, when they make sense, and the risks that come with a compromised grand master key. Quick Answer A master key system uses extra pin stacks inside each lock cylinder to create two valid shear points: one for the individual key and one for the master. This allows a single master key to open every lock in the system while individual keys open only designated doors. The system is ideal for buildings with 10 or more access points and tiered personnel access needs. The main risk is that a compromised master key requires rekeying the entire affected tier. How does a master key system work? A standard pin-tumbler lock has a series of pin stacks, each with a driver pin, a key pin, and a spring. When the correct key is inserted, the cuts on the key push each pin stack to align the shear line exactly with the cylinder's shear point, allowing the plug to rotate. A master key system adds a third element: a master wafer between the driver pin and the key pin in each stack. This creates two valid shear points per pin stack. The individual (change) key cuts shear at the standard position. The master key cuts shear at the master wafer position. Both are valid, so both keys can operate the lock. Three-level hierarchy example Grand Master Key: opens every door on the property (held by the building owner or chief security officer). Master Key (by zone or floor): opens all doors within a designated zone (held by floor managers or department heads). Change Key (individual): opens only one specific door or a keyed-alike group of doors (held by individual employees or tenants). When does a master key system make sense? Master key systems make economic sense when the operational burden of managing individual keys outweighs the cost of commissioning the system. The crossover point is generally around 10 to 15 access points. Property type Likely appropriate Likely unnecessary Multi-tenant office building Yes: tiered access for maintenance, management, tenants No 50+ unit apartment complex Yes: property manager needs access to all units No Single-tenant small office (5-10 doors) Marginal: evaluate vs. key ring management Possibly Single-family rental No Yes: standard rekey is sufficient Campus or multi-building complex Yes: grand master + zone masters + change keys No What does a master key system cost? Pricing varies by the number of doors, the number of hierarchy levels, the cylinder brand chosen, and whether restricted keyways are included. Approximate ranges as of 2026: Basic system (10–15 doors, 2 levels) Standard keyway cylinders $600–$1,500 Mid-size system (16–50 doors, 3 levels) Includes hardware and key cutting $1,500–$4,000 Large system (50+ doors, 3–4 levels) Restricted keyway recommended at this scale $3,000–$10,000+ Adding a door to existing system Requires original bitting list $45–$120 per door Risks of a master key system The mechanical elegance of a master key system creates a vulnerability that many property managers underestimate: the master key is an amplified single point of failure. Key management discipline at the master and grand master level is critical. Lost master key at the change-key level: rekey only the doors that key accessed. Low cost, contained impact. Lost master key at the master-key level: rekey every door in the affected zone. Moderate cost, one zone disrupted. Lost grand master key: rekey every door in the system. High cost, entire property disrupted. In a worst case, the entire keying hierarchy must be rebuilt. Master key duplication: if the system uses a standard keyway, any hardware store can potentially duplicate the master key without the property manager's knowledge. This is why restricted keyways are strongly recommended for master-key-level keys in high-security systems. Pairing master key systems with restricted keyways The industry standard for medium and large commercial master key systems is to use a restricted keyway for the master-key and grand-master-key level, while using standard cylinders at the change-key level if cost is a concern. This ensures that the keys with the broadest access cannot be duplicated at an unauthorized source, even if the change keys remain vulnerable. See the /guides/key-control-systems.php">key control systems guide for a comparison of restricted keyway brands and pricing. How to choose a master key system vendor A master key system locks you into a vendor relationship for the life of the hardware. Questions to ask before committing: Will you provide the full bitting list and key records in writing so we can work with another locksmith in the future? What cylinder brand do you standardize on, and what is the cost of additional cylinders? Do you use restricted keyways for master-level keys? What is your process when a master key is reported lost or stolen? Do you carry errors and omissions insurance for system failures? Master key system FAQ How does a master key system work mechanically? A master key system uses a dual-shear-point pin-tumbler mechanism. Each lock has an extra master wafer between the driver pin and key pin. The master key shears at the master wafer position while individual keys shear at the standard shear line. Both are valid positions, so both keys operate the same lock. What does a master key system cost to commission? A basic 10 to 15 door system typically costs $600 to $1,500 in installation and setup. A large commercial system with multiple master tiers for 50 or more doors can run $2,500 to $10,000 or more depending on cylinder brand and number of hierarchy levels. What happens if a master key is lost? A lost change key requires rekeying only the doors it accessed. A lost master key requires rekeying every door in the affected zone. A lost grand master key requires rekeying the entire system. This is why grand master keys should never leave the property and should be stored separately from master keys. Can I add doors to an existing master key system? Yes, as long as the original locksmith maintained the bitting list. Adding doors requires the same cylinder brand and keyway as the existing system. If the original locksmith is unavailable and no bitting list exists, the system may need to be rebuilt from scratch. Related guides /index.php" class="related-strip__card"> Commercial Lock Changes: Full Guide See the full commercial lock change resource covering all three strategies. /guides/key-control-systems.php" class="related-strip__card"> Key Control Systems How restricted keyways prevent unauthorized key duplication in master key systems. /guides/commercial-lock-change-checklist.php" class="related-strip__card"> Lock Change Checklist Plan a complete commercial lock change from audit to key log update. --- # Key Control Systems: Restricted Keyways, Key Cabinets & Access Management URL: https://changelocks.net/guides/key-control-systems Last Updated: 2026-06-03 "> "> /images/favicon.ico?v= "> "> "> /images/og.jpg?v= "> "> /llms.txt"> /images/hero-keycontrol.jpg?v= " alt="Electronic key control cabinet with individual locking hooks and digital audit log screen mounted in a secure room" fetchpriority="high" decoding="async" width="1376" height="768" style="position:absolute;inset:0;width:100%;height:100%;object-fit:cover;"> /index.php">Home › /index.php#guides">Guides › Key Control Systems Key Control Systems Restricted keyways, electronic key cabinets, and cloud-based key management platforms that give auditable control over every key copy made. Quick Answer Key control is the set of systems and policies that determine who can obtain a copy of a key. The three main tools are: restricted keyways (prevent unauthorized duplication at the hardware level), electronic key cabinets (track physical key possession with audit logs), and cloud-based key management platforms (connect key issuance to HR, access policies, and incident response). Most commercial properties need at least one of these; high-security environments typically use all three in combination. What is a restricted keyway? A restricted keyway is a proprietary key profile registered to a specific keyholder organization. Hardware stores cannot cut copies because they do not stock the key blank. Even locksmiths who do carry the blank cannot cut new keys without verifying the requester is authorized under the registered account. The restriction is enforced through the manufacturer's dealer network. When a new key is needed, the authorized representative contacts the registered dealer with proof of authorization. The dealer logs the request and cuts the key. This creates an auditable record of every copy in existence. Restricted keyway brands compared Medeco (High Security) Pin-tumbler + rotating pins; widely available through commercial locksmiths $95–$155 per cylinder Mul-T-Lock MT5+ Telescoping pin technology; extensive US dealer network $90–$145 per cylinder ASSA Abloy Protec2 Disc-detainer mechanism; highest pick resistance; ideal for master key systems $140–$210 per cylinder Schlage Primus Sidebar mechanism; widely distributed in US commercial market $75–$125 per cylinder Electronic key cabinets An electronic key cabinet is a wall-mounted unit with individual locking hooks for physical keys. Each hook is locked and only releases when the user authenticates (PIN, card, or biometric). Every key removal and return is logged with a timestamp and user ID. Electronic key cabinets are the appropriate solution when: Multiple staff members need access to the same physical keys at different times A compliance or insurance requirement mandates an audit log of key access Key possession is a factor in investigating an incident The property manages vehicles, equipment, or facility keys across a large team Leading brands include Morse Watchmans (KeyWatcher), Traka, and Kantech. Systems are available in 12-key to 200-key configurations. Integration with HR systems allows automatic credential changes when an employee is onboarded or offboarded. Cloud-based key management platforms Cloud-based key management systems provide a software layer that connects physical key issuance with HR records, access policies, and incident response workflows. Features typically include: Digital key log replacing paper records Automated alerts when a key has not been returned by a scheduled date Integration with property management platforms (AppFolio, Yardi, Buildium) to trigger rekey orders on tenant move-out Mobile access for property managers to audit key status across multiple sites Incident response workflow: mark a key as lost, notify affected stakeholders, initiate rekey order Notable platforms include Keysafe (US-focused property management), KeyTrak (US-focused commercial and healthcare), and Keynest (UK-focused short-term rental). Most charge on a per-property or per-user SaaS basis, typically $40 to $200 per month depending on portfolio size. How to choose the right key control approach The right combination of key control tools depends on your security requirements, budget, and the number of key-access events per year. Decision guide Small office (1–10 staff, 1 location): Restricted keyway for any master key level; standard key log (spreadsheet or paper) for change keys. Electronic cabinet is optional. Mid-size commercial property (10–50 access points): Restricted keyway throughout; electronic key cabinet for shared keys (fleet, equipment, master); basic property management integration. Large campus or multi-site portfolio (50+ access points, multiple properties): Restricted keyway system with master key hierarchy; electronic key cabinet at each site; cloud platform for cross-site audit and HR integration. Key control FAQ What is a restricted keyway? A restricted keyway is a proprietary key profile that hardware stores and most locksmiths cannot duplicate without specific authorization from the registered keyholder. The manufacturer maintains a registry of authorized dealers and requires documented justification before cutting new keys, providing a chain of custody for every copy. Which restricted keyway brands are most widely supported? The three most widely supported brands in US commercial applications are Medeco, Mul-T-Lock, and ASSA Abloy Protec2. Medeco and Mul-T-Lock are available through most commercial locksmith networks. ASSA Abloy Protec2 is considered highest security but has a narrower dealer network. What is an electronic key cabinet? An electronic key cabinet is a wall-mounted unit where each physical key hook is locked and only releases when authenticated. The system logs every removal and return with timestamp and user ID, providing a tamper-evident audit trail. Common brands include KeyWatcher, Traka, and Kantech. When should I upgrade to a restricted keyway system? Upgrade triggers: you suspect an unauthorized key copy has been made; you are implementing a master key system; a security audit identified key duplication as a vulnerability; or you manage a high-security area (server room, pharmacy, evidence storage) where access accountability is required. Related guides /index.php" class="related-strip__card"> Commercial Lock Changes: Full Guide The complete resource on rekeying, restricted keyways, and electronic access for businesses. /guides/master-key-systems.php" class="related-strip__card"> Master Key Systems How hierarchical keying works and why restricted keyways are essential at the master-key level. /guides/multi-unit-rekey-strategy.php" class="related-strip__card"> Multi-Unit Rekey Strategy How apartment complexes and office parks plan and price bulk rekeying programs. --- # Multi-Unit Rekey Strategy: Costs, Scheduling & Vendor Management URL: https://changelocks.net/guides/multi-unit-rekey-strategy Last Updated: 2026-06-03 "> "> /images/favicon.ico?v= "> "> "> /images/og.jpg?v= "> "> /llms.txt"> /images/hero-multiunit.jpg?v= " alt="Commercial locksmith rekeying entry cylinders on a row of apartment doors during a scheduled bulk rekey operation" fetchpriority="high" decoding="async" width="1376" height="768" style="position:absolute;inset:0;width:100%;height:100%;object-fit:cover;"> /index.php">Home › /index.php#guides">Guides › Multi-Unit Rekey Strategy Multi-Unit Rekey Strategy How apartment complexes, office parks, and campus facilities schedule and price bulk rekeying to minimize cost per door and disruption to operations. Quick Answer Multi-unit rekeying costs $15 to $30 per cylinder when a single vendor mobilizes for a grouped job, compared to $30 to $55 per cylinder for individual service calls. The key to minimizing cost is grouping units into batches, standardizing cylinder hardware across the portfolio, and establishing a preferred vendor relationship with a negotiated per-cylinder rate rather than ad-hoc pricing. How volume rekey pricing works Commercial locksmiths price multi-unit jobs on two components: a mobilization or service-call fee and a per-cylinder rekey rate. The mobilization fee is fixed regardless of how many units are done; the per-cylinder rate decreases as volume increases. This creates a strong economic incentive to batch units rather than calling for one or two at a time. Typical volume pricing tiers: 1–4 cylinders Single-unit service call $35–$55 per cylinder 5–15 cylinders Small batch (one section or floor) $22–$35 per cylinder 16–50 cylinders Mid-size batch (full building or complex) $15–$25 per cylinder 50+ cylinders Annual contract or campus-wide $12–$18 per cylinder Scheduling strategy for multi-unit properties The most efficient scheduling approach matches the locksmith's mobilization to the make-ready window: the period between a tenant move-out and the next move-in. During that window, the unit is typically unlocked and accessible, and the rekey can be completed alongside cleaning and painting without requiring separate access coordination. For properties with rolling vacancy (units turning over continuously), the two most common approaches are: Batched weekly or biweekly: Hold all move-outs for the week and schedule the locksmith for a single visit. Batch size of 5 to 10 units typically qualifies for mid-tier pricing and one mobilization fee. Scheduled monthly sweep: Contract for a monthly visit where the locksmith works through all units that turned over in the prior 30 days. Most effective for properties with 50+ units and consistent monthly turnover above 5 percent. Choosing and managing a vendor for multi-unit work A single-vendor relationship provides pricing consistency, cylinder standardization, and a unified key log format. When evaluating vendors for a multi-unit property contract: Vendor evaluation checklist State locksmith license (verify number independently) General liability insurance of at least $1 million per occurrence Experience with your specific cylinder brand (ask for references from similar properties) Capacity to complete a batch of 20 units within one business day if needed Willingness to provide a written per-cylinder contract rate, not ad-hoc pricing Agreement to provide the full bitting list as part of your records Key issuance documentation format compatible with your property management system How to reduce multi-unit rekey costs Four strategies that meaningfully reduce the per-unit cost of a multi-property rekey program: Standardize cylinder hardware across the portfolio. If every property uses the same brand and grade of cylinder, rekeyed cylinders can be transferred between units and properties rather than discarded when replaced. Negotiate an annual contract. A commitment to a minimum annual cylinder volume (typically 100 to 200 for a mid-size portfolio) typically unlocks the lowest per-cylinder rate. Use keyed-alike cylinders within a unit. If the entry door and deadbolt take the same key, only one cylinder needs rekeying per unit turnover. Confirm that the cylinders are on the same keyway and can be pinned alike by the vendor. Upgrade to restricted keyways at high-turnover units. Counterintuitively, restricted keyways can reduce long-term rekey costs in high-turnover units by eliminating unauthorized copies that would otherwise require an additional rekey cycle. Multi-unit rekey FAQ What does it cost to rekey an entire apartment complex? Volume rekey pricing typically starts at $15 to $30 per cylinder for a multi-unit job. A 50-unit complex with two cylinders per unit would cost approximately $1,500 to $3,000 for a complete rekey, compared to $3,500 to $5,500 at single-unit call-out rates. How should I schedule rekeying across multiple vacant units? Group vacant units by building section and schedule the locksmith to work through them in order during the make-ready window. Most experienced commercial locksmiths can rekey 15 to 25 cylinders per hour. Coordinate with your make-ready crew so the locksmith does not need to wait for other trades on each unit. Should I use the same locksmith for all my properties? A single vendor relationship provides pricing consistency, hardware standardization, and a unified key log format. Ensure the bitting list is part of your records rather than the vendor's proprietary data to mitigate dependency risk if the relationship ends. How do I reduce rekey costs without compromising security? Standardize to one cylinder brand across the portfolio, negotiate an annual contract for volume pricing, use keyed-alike cylinders within each unit to reduce count, and upgrade to restricted keyways in high-turnover units to reduce the frequency of rekey cycles caused by unauthorized copies. Related guides /index.php" class="related-strip__card"> Commercial Lock Changes: Full Guide The complete resource on commercial lock change strategies for businesses and property managers. /guides/commercial-lock-change-checklist.php" class="related-strip__card"> Lock Change Checklist Audit, scope, and document a commercial lock change from start to finish. /guides/key-control-systems.php" class="related-strip__card"> Key Control Systems Restricted keyways and key management platforms for auditable control over every copy. --- # About ChangeLocks.net URL: https://changelocks.net/about Last Updated: 2026-06-03 "> "> "> "> "> "> "> "> "> /images/favicon.ico"> /images/icon-192.png"> /llms.txt"> /llms-full.txt"> /images/hero-about.jpg')"> /">Home › About About ChangeLocks.net Independent research for commercial lock security decisions — written for property managers, not locksmiths /images/content/editorial-research.jpg" alt="Commercial security researcher reviewing lock specifications and property documentation" width="600" height="400" loading="lazy"> Our Mission Practical commercial security guidance — without the sales pitch Property managers and business owners face lock change decisions at a scale that most consumer guides never address. When you need to rekey a 120-unit apartment complex after a master key goes missing, or redesign access control for a growing office, you need answers from someone who understands the operational and financial side of the decision — not just the locksmith's quote sheet. ChangeLocks.net exists to fill that gap. Every guide on this site is written with one question in mind: what does a facilities manager or property owner actually need to know to make the right call and get a fair price? Coverage Areas What ChangeLocks.net covers We focus exclusively on commercial and multi-unit residential scenarios. This is not a site for homeowners changing a single door lock. Commercial Lock Changes Office buildings, retail spaces, and business locations — the full decision framework for timing, hardware selection, and vendor management. Multi-Unit Rekey Strategy Volume pricing, scheduling, and coordination strategies for property managers overseeing 10 to 500+ units. Master Key Systems How hierarchical key systems work, when they make sense, and how to avoid the common design mistakes that create security vulnerabilities. Key Control Systems Restricted keyways, electronic key cabinets, and key management platforms — the full spectrum from mechanical control to cloud-based access management. Employee Turnover Protocols The access revocation checklist and lock change triggers that protect commercial properties when staff changes happen. Cost Benchmarks Volume pricing tables, quote comparison frameworks, and the red flags that signal an overpriced estimate — based on aggregated real-world vendor data. /images/content/property-manager-rekey.jpg" alt="Property manager reviewing commercial lock change specifications with vendor documentation" width="600" height="400" loading="lazy"> How We Research Our research methodology Every guide on ChangeLocks.net is built from the same process: collecting real vendor quotes, reviewing commercial locksmith trade literature, and cross-referencing published pricing data from property management industry sources. We do not accept payment from locksmith vendors or hardware manufacturers for placement, recommendations, or reviews. Brand comparisons — such as our Medeco vs. Mul-T-Lock vs. ASSA Abloy scorecard — are based on published specification sheets, independent security test results, and aggregated cost data. Where costs are cited, they reflect the range found in real quotes collected from commercial locksmith vendors across multiple U.S. markets. Individual quotes will vary by region, hardware specification, and project scale — we flag these sources of variance explicitly in each guide. Editorial Standards What we will and will not do What we do Cite specific cost ranges with the number of sources and markets used Flag when vendor pricing or product specs could not be independently verified Update guides when industry pricing or best practices shift materially Note conflicts of interest when any affiliate or partner relationship exists Cover both sides of hardware debates (e.g., rekeying vs. full replacement) Link to primary sources: ANSI/BHMA standards, ALOA certification criteria, state licensing board requirements What we do not do Accept sponsored placement in recommendations or comparison tables Recommend specific vendors by name for work in your area Provide the equivalent of professional security consulting for a specific property Cite cost data older than 24 months without flagging the age Make claims about specific product security ratings without linking to the test source Audience Who this site is written for These guides are designed for people making commercial and multi-unit lock decisions — not for residential homeowners. 01 Property Managers Managing multi-unit residential properties, HOA portfolios, or commercial real estate — anyone who deals with lock changes at volume and needs a consistent framework for vendor management and cost control. 02 Facilities Directors Corporate facilities teams responsible for physical access control across one or multiple buildings — from key issuance policy to post-employee-termination lock change protocols. 03 Business Owners Small and mid-size business owners making their first master key system decision, dealing with an employee separation security event, or evaluating the step up to restricted keyways. 04 Office Managers Office managers and operations leads who own the physical security checklist but may not have a dedicated facilities team to draw on for guidance. Get in Touch Questions, corrections, or feedback? If you find outdated pricing data, a factual error, or a commercial lock scenario we have not covered, we want to hear about it. /contact" class="btn-cta">Contact Us --- # Contact ChangeLocks.net URL: https://changelocks.net/contact Last Updated: 2026-06-03 "> "> "> "> "> "> /images/favicon.ico"> /images/icon-192.png"> /llms.txt"> /llms-full.txt"> /images/hero-contact.jpg')"> /">Home › Contact Contact Us Questions, corrections, or a commercial lock scenario you want us to cover Editorial Inquiries What to reach out about Factual corrections If pricing data, a product specification, or a regulatory reference is outdated or wrong, we want to fix it. Include the guide URL and the correct source. Topic requests Commercial lock scenario we have not covered yet? Let us know the specific situation and we will consider it for a future guide. Industry expertise Commercial locksmith professionals, security consultants, or property management experts who want to contribute data or methodology improvements. General questions Questions about methodology, data sources, or how a specific guide applies to your property management situation. We respond to most inquiries within 2 business days. We do not provide specific vendor referrals or quotes for individual projects. Send a message Name * Email * Subject Select a topic (optional) Factual correction Topic / guide request Industry expertise contribution Methodology question General question Message * Send Message