Sound familiar?London
- The call
- The keys the seller handed over came in a sandwich bag: six unlabelled copies for two locks of different makes from different decades. You have no idea how many more copies exist or who is holding them.

Someone tried the back door while you were away. The jamb is splintered around the strike, the bolt is bent, and the knob turns with a grinding feel.
When people say upgrade they usually mean a heavier lock, and there is a real scale behind that word. Builders hardware in North America is graded to ANSI/BHMA standards, with Grade 1 the highest and Grade 3 the lightest, and residential products carry a separate label scoring security, durability and finish. A higher grade certifies stronger performance on the standard's own tests, and moving up often brings a longer hardened bolt, a sturdier housing, pins that resist picking and a strike built to anchor into the framing, though the exact features depend on the model. The locksmith explains which grade fits which door.
Sound familiar?London
Lock Replacement & Upgrade · London

Scene 1
The first check is about the person, not the door. An owner can change any lock on their home. A tenant who wants new hardware on the unit door needs the landlord's agreement, and a landlord who changes a lock while a tenant lives there hands over new keys. The locksmith asks which situation applies and, where paperwork helps, looks at identification, a deed, a lease or a property-management note. It takes a minute and it means the new lock goes on with everyone who has a stake in the door knowing about it, which is exactly how a lock should start its working life.
Scene 2
A smart lock is fitted like any deadbolt, then brought to life. The bolt and exterior keypad go on first, the interior module with its battery pack after, and the door is closed so the lock can learn where the bolt sits; a bolt that meets resistance in the strike is corrected before pairing, because a straining motor drains batteries and fails early. Codes are programmed for each person, auto-lock and sound settings are set to your liking, any phone or hub pairing is completed, and the mechanical override cylinder is tested with its key. Fresh batteries go in last.
Scene 3
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.
What shapes the quoteCalamity Corners Locksmith Co.
FeesSame any hour
The lock hardware is the same; the door construction changes the method. Steel and fibreglass doors have a wooden or composite block inside the lock stile, and existing bores are used wherever possible. Where a new deadbolt must be added, the locksmith drills with a jig and bits suited to the skin so the hole is clean and square, and fits an edge plate designed for that door. Insulated doors also move less with humidity, so alignment tends to hold well.
Photographs of each lock from outside and inside, plus one of the door edge showing the latch plate and one of the strike on the frame, tell the locksmith most of what they need. Add the door thickness if you can measure it, whether the door is wood, steel or fibreglass, the finish you want to match, how many doors are involved and whether you want them all on one key.
Usually, yes. Most residential doors are prepared to standard sizes, a 54 millimetre cross bore and a backset of 60 or 70 millimetres, and most modern hardware adjusts between those backsets. The locksmith measures before choosing, so the new lock is matched to the door rather than the other way around. Where an older mortise lock or an unusual bore is found, filler plates, extension kits or a carefully jigged new bore bring the door to standard.
MiddlesexOntario
Lock Replacement & Upgrade · Lucan Biddulph, Middlesex Centre, Broughdale, Calamity Corners, Masonville, Orchard Park, Sherwood Forest, Stoneybrook, University Heights, White Hills, Northcrest
Every square is one home in a hundred.
On-site assessment
Someone tried the back door while you were away.
(226) 271-6061, open 24/7.
On-site assessment preferred · (226) 271-6061, open 24/7