Fresh Lock Installation in Harrow
New door, a second lock for extra security, or a lock where there wasn’t one before? I fit fresh locks properly and to standard across Harrow and the surrounding areas, measured, aligned and warranty-backed. Lock installation from £89 labour, no call-out fee.
Getting a lock installation right matters more than most people realise. It’s not just about choosing the right lock — it’s about fitting it correctly. The wrong size cylinder, a mortice seated too shallow, a nightlatch that doesn’t sit flush: any of these creates a weak point a burglar will find before you do.
I measure before I drill. Every lock I fit is aligned properly, tested on the door, and backed by a 12-month warranty. No shortcuts, no guesswork.
Whether it’s a new door that needs its first lock, a second lock for extra peace of mind, or an upgrade to a BS3621 British Standard mortice your insurer has asked for — I’ll tell you exactly what’s needed and why before I start. The video shows a real installation in Harrow, start to finish.
Watch a real lock installation in Harrow — start to finish.
What I install
- New cylinder and mortice locks
- Second / additional locks and deadbolts
- Nightlatches (Yale-type)
- Locks on new or replacement doors
- Insurance-specified locks
Mortice lock fitting & British Standard locks
Mortice lock fitting: wooden doors take a mortice lock cut into the door edge. I fit and upgrade BS3621 British Standard mortice locks, the standard most home insurers ask for on a final-exit door. If your timber door has only a nightlatch and no mortice deadlock, it’s likely below what your policy expects; I can put that right. I fit British Standard cylinders and nightlatches too, from leading manufacturers, and suggest the right lock for your door and budget.
How I fit a mortice lock — a real Harrow job
1. Morticing the door
Cutting the pocket for the new lock.
2. Chiselling it square
Cleaning the mortice so the lock seats.
3. Fitting the new lock
Seated, aligned and tested.
Independent locksmith, Harrow-based
I work independently and can assess your needs by phone as well as in person. No call-out fee, 5-star rated, covering Harrow and the surrounding areas. Replacing an old lock instead? That’s a lock change. See my prices.