Master Key & Rekeying
Quick answer: Master key and rekeying services allow businesses to organize multiple locks into a structured hierarchy so one master key opens all doors while individual keys access only designated areas. Low Rate Locksmith, a licensed and bonded 24/7 mobile locksmith, provides commercial master key system design and rekeying for offices, rental properties, and facilities needing efficient, cost-effective access control without full lock replacement.
Master Key & Rekeying is one of the most requested commercial locksmith services for businesses, property managers, and facility operators who need structured access control across multiple doors and lock cylinders. Whether you’re reorganizing tenant access, onboarding new management, or building a hierarchical key system from scratch, Master Key & Rekeying gives you a single framework to manage who opens what — without replacing every piece of hardware on the property. This page covers what the service includes, what drives the quote, what to have ready, and how to confirm it’s the right path before you call.
What Master Key & Rekeying IS — and What It Is NOT
What it is: This service covers the repinning or rekeying of compatible commercial lock cylinders so they operate under a master key system — a hierarchy where individual change keys open specific doors and one or more master keys open defined groups (or all) of those doors. It also covers standalone rekeying of commercial cylinders when you simply need to void old keys without changing hardware. Work may include master system charting, pin configuration, key cutting, construction master setup, and integration of interchangeable-core (IC) platforms where appropriate.
What it is NOT:
- It is not a lock installation or hardware replacement service. If your cylinders or locksets are physically damaged, worn out, or incompatible with master pinning, new hardware may be required — that falls under Lock Installation & Repair.
- It does not include electronic access control programming, card readers, or smart-lock credential management. If your building uses electronic systems, see Access Control.
- It does not cover safe combination changes or vault lock rekeying. For those, see Safe & Vault Services.
- Standard brass keys are not automatically included at no charge. Key cutting is quoted separately per key — the number of change keys and master keys you need will be part of the on-site quote.
- It does not guarantee that every existing cylinder on your property can be master-keyed. Some proprietary, restricted, or heavily worn cylinders may need replacement hardware to participate in a master system.
Who Master Key & Rekeying Is FOR — and Who It Is NOT For
This service fits you if:
- You manage a multi-door commercial property (office building, retail strip, warehouse, school, church, HOA common area) and need structured key hierarchy.
- You’ve experienced staff turnover, a lost key event, or a tenant changeover and need to void previous keys across the property.
- You’re a property manager overseeing multiple units and need one master to access all doors while each tenant retains a unique key. For ongoing property needs, Property Management Locksmith services may also apply.
- You’re a general contractor needing a construction master key that can be voided at project handoff — provided your existing cylinders or specified hardware support a construction master platform (e.g., Schlage MCK, SFIC construction cores). If they don’t, new hardware may be required and will be quoted before work begins.
This service is NOT for you if:
- You need a single residential rekey with no master hierarchy — a standard residential rekey service is a better fit.
- Your primary concern is broken locks, damaged door hardware, or exit device repair. Start with Door Hardware & Exit Devices instead.
- You’re locked out right now and need immediate entry. That’s a Business Lockout call — rekeying or master work can follow once you’re back inside.
- You need high-volume key copies without any repinning or system changes. See Key Duplication & Key Management.
How We Do It: The On-Site Process
- Authorization & Verification. The technician verifies your identity and legal authority over the property before any work begins. Business ID, lease documentation, or property-management credentials may be required.
- Site Assessment & Cylinder Audit. Every door and cylinder is inspected for brand, keyway, condition, and compatibility with master pinning. Cylinders that are worn, proprietary, or restricted-keyway are flagged. IC (interchangeable core) systems are checked for control key availability — if no control key exists, additional steps such as picking, decoding, or drilling may be necessary, adding cost and potentially requiring core replacement.
- Master System Design & Charting. For new or expanded master systems, the technician charts the key hierarchy — accounting for Maximum Adjacent Cut Specification (MACS) rules, cross-keying avoidance, and future expansion capacity. This step is critical: poorly planned systems create security vulnerabilities and operational headaches. Complex multi-level systems (grand master, sub-master, change keys) require more charting time and are quoted explicitly.
- On-Site Quote. Before any pins are touched, you receive a written breakdown: service call fee, per-cylinder labor, master pins and parts, key cutting charges, and any additional costs for high-security cores, IC decoding, or hardware replacement. You approve before work starts.
- Repinning & Key Cutting. Cylinders are repinned to the approved chart. Master pins are installed at the correct chambers. Keys are cut and tested door by door.
- System Verification & Handoff. Every key is tested in every assigned cylinder. The master key is verified across the full group. You receive the key chart, all cut keys, and operational notes.
How Our Pricing Works for Master Key & Rekeying
Every service call follows the same transparent structure:
- $45 Service Call Fee — covers travel and dispatch to your location. This applies to every visit; travel is never free.
- Per-Cylinder Labor — quoted on site based on cylinder type, number of master pin levels, and system complexity. Standard commercial cylinders during business hours typically fall in the $95–$250 range for the overall job depending on scope. After-hours or emergency calls typically range $145–$325+.
- Parts & Keys — master pins, springs, key blanks, and any replacement cylinders are itemized separately. Keys are charged per key cut, not included by default.
- SFIC/LFIC Core Work — billed per core at rates that typically exceed standard cylinder repinning. Control key decoding, core swaps, and replacement cores carry separate line items and are quoted before work.
- Master System Charting — for new or large-scale systems, charting time is quoted as a separate line item reflecting system size and hierarchy depth.
- Complex / High-Security / Large-Scope Work — any job involving restricted keyways, multi-level grand master systems, construction master platforms, or more than a handful of cylinders is assessed and quoted explicitly before work begins. No flat total is assumed.
Key pricing drivers: number of cylinders, number of master levels, cylinder brand/platform, IC vs. standard, after-hours timing, and whether new hardware is needed.
Real-World Scenarios: Master Key & Rekeying in Action
1. Office Building Tenant Turnover. A property manager has three outgoing tenants in a 12-suite office building. Each suite rekey needs to void the old tenant’s key while keeping the building master intact. The technician audits each suite’s cylinders, repins them to new change keys, and verifies the existing master still operates across the entire building. For properties with frequent turnover, a Maintenance Plan can simplify recurring rekey scheduling and budgeting.
2. New Warehouse with No Key Control. A distribution company just leased a 40,000-square-foot warehouse and has no idea how many copies of the old keys exist. The entire facility — roll-up access doors, office entries, electrical rooms — is rekeyed to a new master system. The scope assessment identifies two damaged cylinders that need Lock Installation & Repair before they can participate in the master system.
3. Church with Sub-Master Hierarchy. A church needs the head pastor’s key to open every door, department heads to open only their wing, and volunteers to access only the fellowship hall and kitchen. A three-level master chart is designed, accounting for MACS rules and future expansion as new rooms are added. Each level is tested and documented at handoff.
4. Retail Chain Rekeying After Employee Theft. A retail store discovers missing inventory and suspects a former employee retained a key. Every exterior and stockroom cylinder is rekeyed immediately. The store manager also requests a Security Assessment to evaluate whether additional measures — like upgrading to restricted-keyway cylinders — would reduce future risk. Related damage from a break-in may fall under Burglary Repair & Security Upgrades.
5. Construction Master for a Commercial Build-Out. A general contractor needs temporary access to all doors during a tenant improvement project, with a planned void-out at final handoff to the building owner. The technician confirms the specified hardware supports a construction master platform (such as Schlage MCK or SFIC construction cores). If existing cylinders are incompatible, replacement hardware is quoted before work proceeds. Once the owner takes possession, the construction master is voided and permanent keys are issued.
6. Medical Office with IC Cores and a Lost Control Key. A medical practice uses small-format interchangeable cores (SFIC) across 18 doors but the facility manager has lost the control key. Without a control key, cores cannot be pulled normally — the technician may need to pick, decode, or drill individual cores, with added labor and potential core replacement costs. Each core is quoted individually, and the practice is set up with new control keys and a documented Key Duplication & Key Management protocol going forward.
7. HOA Common-Area Rekey After Board Change. A homeowner association board replaces its management company and needs all common-area locks — pool gate, clubhouse, maintenance closet, mailroom — rekeyed so old management keys no longer work. The technician designs a simple two-level master: one board master, and individual change keys for the pool attendant and maintenance contractor. Cylinders are audited for compatibility before any repinning begins.
When to Call for This Service — and When to Stop
Call when:
- You need to void old keys across a commercial property.
- You want to create, expand, or restructure a master key hierarchy.
- You’re onboarding a new tenant, manager, or contractor and need controlled key access.
- You need a construction master set up or voided at project handoff.
Stop — this may not be us if:
- USPS / federal mailbox locks: Master keys for US Postal Service cluster box units (CBUs) and certain federal locks are restricted to authorized postal or government personnel. We cannot rekey, duplicate, or master-key these locks.
- Patented / restricted keyway systems under dealer-only agreements: Some high-security platforms (e.g., Medeco M4, Abloy Protec2, Mul-T-Lock MT5+) require factory-authorized dealer service. If your cylinders carry a restricted keyway, confirm with us by phone first — we’ll tell you honestly if a dealer referral is the right path.
- Fire-code / egress compliance work: Master keying does not override code requirements for panic hardware, fire-rated doors, or egress paths. If your project involves door hardware changes on rated openings, a code-compliant assessment may be needed first. See Door Hardware & Exit Devices.
- Very large campus-scale systems (100+ cylinders, 4+ master levels): These projects typically require a dedicated site survey, keying-system engineering, and phased implementation. We can often handle them, but they are not a standard mobile call — phone consultation and a site visit for scoping come first.
- Electronic credential changes without mechanical cylinders: If your building is fully electronic with no keyed cylinders, you need Access Control service, not rekeying.
Related from Low Rate Locksmith: High-Security Locks, Lock Installation & Repair, Industrial & Institutional Locksmith, Safe & Vault Services, Burglary Repair & Security Upgrades, Maintenance Plans, Fleet Vehicle Locksmith, Property Management Locksmith.
Frequently Asked Questions
What does this service cover?
It covers the repinning of compatible commercial lock cylinders to new key combinations, the design and implementation of master key hierarchies (single master, sub-master, grand master, construction master), key cutting, IC core work where applicable, and system charting and documentation. Hardware replacement, electronic access control, and safe or vault locks are separate services.
What affects the quote?
The primary drivers are the number of cylinders, the number of master levels in your hierarchy, cylinder type (standard vs. SFIC/LFIC vs. high-security), whether a control key is available for IC systems, the number of keys to be cut, whether new hardware is needed, and whether the call is during business hours or after hours. Every quote is built on site after a full assessment — the $45 service call fee applies regardless of scope.
What should I have ready?
Have proof of authorization for the property (business license, lease, property management agreement), any existing keys including master and control keys, a list of doors you want included, and a rough idea of who needs access to what. If you have an existing key chart or bitting list from a previous locksmith, bring that — it saves significant time. For IC core systems, having the control key available avoids added labor and cost.
How do I confirm the right service path?
Call and describe the number of doors, the type of locks you see (brand name on the face of the cylinder helps), whether you have existing master or control keys, and what access structure you need. The dispatcher can help you determine whether a standard mobile visit covers your scope or whether a site survey is the better first step. If your needs are purely electronic, you’ll be directed to access control services instead.
Call Low Rate Locksmith: (833) 439-8636
24/7 mobile dispatch is available for commercial rekeying and master key system work. A $45 service call fee applies to every visit — this covers dispatch and travel to your location. Labor and parts are quoted on site before work begins, and you approve the full breakdown before anything is touched. No time promises, no hidden fees. Call (833) 439-8636 to describe your project and confirm the right service path.