Whether you’ve just moved in, lost a key, or are tightening up security after a tenant turnover, the cost to rekey a house Ontario wide is one of the most affordable ways to secure a property without replacing hardware. At Masterkey Locksmith Glass & Doors, we get asked about pricing on nearly every call, so this guide breaks down real 2026 numbers for residential rekeys, a master key system for business, smart lock installation Waterloo pricing, commercial locksmith Cambridge rates, and what to expect from an emergency locksmith Kitchener call-out.
How Much Does It Cost to Rekey a House in Ontario? Quick Answer
For most homes in the region, rekeying runs $25 to $45 per lock, with a full home rekey (typically 3 to 5 exterior locks) landing between $100 and $220 including the service call. In the wider GTA, per-lock pricing runs slightly higher, often $35 to $65 per lock, since labour rates in Toronto tend to sit above Kitchener-Waterloo. It’s almost always cheaper than replacing locks outright, since the existing hardware stays in place and only the internal pins change.
Rekeying Cost Breakdown
Rekeying changes the pins inside your existing lock cylinder so old keys stop working, without replacing the lock itself. Here’s what that typically looks like:
- Single lock rekey: $25 to $45
- Full home rekey (3–5 exterior doors): $100 to $220, including the service call
- Mailbox and secondary locks: Often bundled at a discount when done during the same visit
- New keys per lock: Usually included, with extra copies priced separately
A few things move the price within that range:
- Lock brand and complexity. A standard Kwikset or Schlage pin-tumbler is quick to rekey. A high-security cylinder takes more time and parts.
- Number of doors. Locksmiths often reduce the per-lock rate once you’re doing three or more locks in the same visit.
- Timing. Daytime, weekday appointments cost less than evening or weekend calls.
- Access. Detached homes with straightforward door hardware are quicker jobs than older doors needing strike plate or hinge adjustments.
Rekeying is the right call after moving into a resale home, following a lost key, or after a breakup or roommate departure. If your locks are damaged, outdated, or you want a security upgrade, full replacement makes more sense, and typically runs $80 to $250+ per lock depending on hardware.
Master Key System for Business
A master key system for business lets one key open every door in a building, while individual staff keys only open the areas they need. It’s the most budget-friendly way to control access before jumping to a full electronic system, and it’s especially useful for offices, retail units with stockrooms, restaurants, and multi-tenant buildings.
Pricing depends on the number of doors and access tiers involved:
- Master-keyed cylinder pinning: roughly $30 to $50 per cylinder, plus a standard service call
- Small system (10–15 doors, 2–3 access tiers): $600 to $1,500 total for planning, pinning, and keys
- Larger commercial system (30+ doors, multiple hierarchy levels): $2,500 to $10,000 or more, depending on cylinder brand and complexity
The bulk of the cost isn’t the hardware, it’s the planning. A locksmith needs to map out which keys open which doors before pinning a single cylinder, so that a cleaning crew, for example, can access common areas without getting into private offices. Once a system is properly documented, adding a new door or department later is far cheaper than starting from scratch, which is why it’s worth having a locksmith set it up properly the first time rather than piecing it together as you grow.
Smart Lock Installation Waterloo Pricing
Smart lock installation Waterloo homeowners and businesses request typically runs $150 to $300 including the lock hardware and labour, though pricing depends heavily on the model you choose.
- Basic keypad or Bluetooth deadbolt: $150 to $250 installed
- Wi-Fi enabled smart lock with app control: $200 to $300 installed
- Biometric or fully integrated smart-home lock: $400 to $800+, especially when tied into an existing security system
Professional installation usually takes 20 to 60 minutes depending on your door’s existing hardware. Older doors sometimes need minor adjustments to the strike plate or frame before a smart lock will seat properly, which a locksmith will flag before starting the job rather than after.
Commercial Locksmith Cambridge Pricing
Commercial locksmith Cambridge businesses typically work with a base dispatch fee plus an hourly labour rate, since commercial jobs vary so much by hardware type. A realistic starting point:
- Base dispatch/service call: around $45 plus tax
- Commercial labour rate: $85 per hour and up
- Cylinder rekey (commercial-grade): $30 to $50 per cylinder
- Panic bars, mortise cylinders, and automated door hardware: priced after an on-site assessment, since these vary widely by manufacturer
Because commercial buildings often use Grade 1 hardware, mortise locks, or automatic door operators instead of standard residential cylinders, a firm quote almost always requires a technician to see the hardware in person before pricing the job.
Emergency Locksmith Kitchener Costs
Lock problems don’t wait for business hours, and an emergency locksmith Kitchener call-out reflects that. Emergency and after-hours rates commonly run 20 to 50 percent higher than a standard daytime appointment, and late-night, holiday, or peak-demand calls can run close to double the regular rate.
- Standard business-hours lockout: $100 to $160
- Evening or weekend lockout: roughly 20–30% above daytime rates
- Late-night or holiday emergency: can approach double the standard rate
Most reputable locksmiths in the Kitchener-Waterloo-Cambridge area aim for a response time under 30 minutes for genuine emergencies. It’s worth confirming the total price before the technician starts, since Ontario consumer protection rules limit how much a locksmith can charge above a given estimate without your agreement.
What Affects Your Final Locksmith Quote
Across every service above, four factors move your price the most:
- Number of locks or doors involved in the job
- Lock type and brand, since high-security and commercial-grade cylinders take longer to service
- Timing, with evening, weekend, and holiday calls costing more
- Access and hardware condition, since older doors and frames sometimes need adjustment before a new lock or cylinder will seat properly
Frequently Asked Questions
How much does it cost to rekey a house in Ontario?
Most homes pay $100 to $220 for a full rekey of 3 to 5 exterior locks, or $25 to $65 per lock individually depending on your location within the province.
Is rekeying cheaper than replacing locks?
Yes. Rekeying reuses your existing hardware and only changes the internal pins, so it typically costs less than half of full lock replacement.
How much does a master key system cost for a small business?
A small system covering 10 to 15 doors with a couple of access tiers typically costs $600 to $1,500, including planning, pinning, and keys.
Do smart locks need professional installation?
It isn’t strictly required, but professional installation ensures proper alignment and full functionality, especially on older doors that may need minor adjustments first.
How much extra does an emergency locksmith call-out cost?
Expect to pay 20 to 50 percent more than a standard daytime rate, with late-night or holiday emergencies sometimes approaching double the regular price.
Get a Straight Answer from Masterkey Locksmith Glass & Doors
Every property and lock setup is a little different, so the ranges above are meant to help you plan, not replace an actual quote. Masterkey Locksmith Glass & Doors serves Kitchener, Waterloo, and Cambridge with residential rekeying, master key systems, smart lock installation, and 24/7 emergency service. Call us for a transparent estimate before any work begins.
