
Change or rekey · Markham
Lock Replacement & Upgrade in Markham
Every morning the front door key needs the same little dance: push in, lift, wiggle, turn. It has been getting worse for a year, and this week it took three tries in the cold before the deadbolt finally gave.
Call now · open 24/7(289) 306-0409In plain words
A replacement lock has to fit holes that already exist, and that is where the visit begins. The locksmith measures the backset, the distance from the door edge to the centre of the bore, which on most doors is 60 or 70 millimetres, checks the cross-bore diameter and edge-bore size, notes door thickness and handing, and looks at the strike cut-out. Most residential hardware is made to these standard preparations, so the new lock usually drops into place with no new drilling. Where a mortise lock or a thick door departs from the norm, filler plates, extension kits or a careful new bore bring the door up to standard.
How the visit goesEvery morning the front door key needs the same little dance: push in, lift, wiggle, turn. It has been getting worse for a year, and this week it took three tries in the cold before the deadbolt finally gave.
Lock Replacement & Upgrade · Markham
How the visit goes

- 1
The door and frame around the lock
A new lock inherits whatever the door and frame are doing, so both get a look. The locksmith checks whether the door has dropped on its hinges, whether weatherstrip is pushing it out of square, and whether the bolt lands squarely in the strike pocket or rubs its edge. The pocket depth matters as well: a bolt that reaches the back of a shallow pocket is not fully thrown. Hinge screws, a jamb split from an old forced entry and a strike held by short screws are all noted, because the visit will tidy them up so the new hardware works as designed.
- 2
Keying the new locks to one key
New cylinders arrive on random keys, so the locksmith pins them alike on site when you want one key for the house. Each cylinder is removed, the plug slid out on a follower so the springs stay put, and the bottom pins replaced to match a single new key. Existing cylinders that are staying are repinned the same way. Every key is then cut from the new combination, tried in every lock it should open, and any that drag are recut rather than handed over. The result is one key for the front, back and garage doors, and a clear count of how many exist.
- 3
A smart lock with its backup arranged
A keypad or smart deadbolt leaves the visit with codes set for each person, auto-lock and alerts configured, and any phone pairing confirmed while the locksmith is there to check it. You are shown the low-battery signal so you recognise it, and the type of battery the maker calls for. The mechanical override key is the piece to look after: keep it on a keyring or with a neighbour rather than inside the home it opens. A second person's code is set up before the locksmith leaves, so a flat phone or a forgotten code is never a reason to stand on the porch.
In the van
- Handleset with matching deadbolt
- Filler plates and thick-door extension kits
- Manufacturer-approved cylinder lubricant
- Adjustable latch or bolt
- Boring jig and hole saws
What affects the quote
- 1
Grade of hardware
A light Grade 3 knob set, a residential deadbolt with a strong label rating and a Grade 1 commercial-style deadbolt are different products at different levels, and the quote follows the grade you choose for each door.
- 2
Older and mortise hardware
Servicing an original mortise case, sourcing a compatible cylinder or fitting a conversion plate on a century door involves more assessment and fitting time than a standard cylindrical replacement.
- 3
Finish and style
Standard satin nickel or brass is one line; specialty finishes, matched suites across several doors and designer handlesets are others. The finish you choose for exposure and looks is priced as the maker prices it.
Same fees day, night or weekend.
Lock Replacement & Upgrade: questions
Is it possible to upgrade just the exterior locks now and handle interior doors later?
Yes, and it is a common way to spread the work out. Exterior doors carry the security load, so starting there with a graded deadbolt and a reinforced strike covers the part that matters most first. Interior locks, passage sets, privacy locks on bathrooms and bedrooms, can be scheduled for a later visit without affecting anything already done, and the locksmith can note what was fitted so the second visit matches it.
Do I have to prove I own the home before you change a lock?
The locksmith will ask, and it is a sign of a careful trade. Photo identification with the address, a deed or property tax notice, or a mortgage or insurance document is plenty for an owner. Tenants show a lease and the landlord's consent; landlords show ownership and confirm the tenant will receive keys. It is a short step that protects everyone with a right to that door.
Can you replace the lock on a sliding patio door or French doors?
Yes. Sliding doors take a replacement mortise hook lock sized to the rail, often with a keyed exterior, and benefit from a secondary foot bolt or a pin through the frames. French doors are secured by treating the inactive leaf properly with flush bolts into the head and sill, then fitting a deadbolt to the active leaf with a strike into that reinforced edge. Both are routine parts of a residential upgrade.
Lock Replacement & Upgrade near you
York, Ontario
Markham information
- Town
- Markham, York, Ontario
- In business
- 33 years
- Hours
- Open 24/7 · nights, weekends and holidays, same fees
- Phone
- (289) 306-0409
- Visits
- On-site assessment preferred. Request a visit or call.
What the census means at the door
19%
Newer homes. About 19% of homes in Markham were built in 1980 or earlier, according to the 2021 Census.
Recent builds often have steel or fibreglass entry doors rather than solid wood. They resist warping and take hardware well, and a locksmith fitting a deadbolt or reinforced strike works with the door's construction so screws bite into something solid.
56%
A mix of homes. Single-detached houses make up about 56% of homes in Markham (2021 Census).
Where housing types are mixed, the same lost-key call means different things. In a house, rekey every door on the property. In an apartment, rekey the suite door and check with management about the common entrance. The locksmith asks which it is first.
Open 24/7
Request a visit
Every morning the front door key needs the same little dance: push in, lift, wiggle, turn.
Call now · open 24/7(289) 306-0409- On-site assessment preferred
- Same fees day, night or weekend
- 33 years in business




