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Lock Installation Service in Maidstone
Need lock installation in Maidstone? We dispatch around the clock, seven days a week and aim to reach you within 28 minutes. Fixed quote before work begins.
Other locksmith services in Maidstone need lock changes, repairs, upgrades or commercial help instead?
All services in Maidstone →Council-built and post-war estate properties span a wide age range — some have had no door changes since the 1960s, others have been through multiple replacement cycles. The matrix handles both: original timber frames use the timber column and the door-condition check; any UPVC or composite replacement uses the UPVC/composite column with the standard backset guide.
Fit reference
Maidstone doors × lock families — fit reference
The four door types we see most across Maidstone and the ME14 area, mapped to the lock families we fit against each. Cells marked with ⬥ meet BS3621 or an insurance-grade equivalent.
| Door | Primary lock | Secondary / supplementary | Add-on security |
|---|---|---|---|
| Timber front door | ⬥ 5-lever mortice deadlock | Night-latch (supplementary) | ⬥ Rim deadlock (belt-and-braces) |
| UPVC / composite front | ⬥ Euro cylinder — TS007 3-star | Multipoint gearbox with hook | Sash jammers / shoot-bolts |
| New-build composite | ⬥ EN1303 grade 6 euro cylinder | PAS 24 compliant multipoint | Anti-snap + anti-bump as standard |
| Aluminium back/side | Adams Rite 1850 / 4710 | Mortice deadlock with cylinder | Hook-bolt for sliding variants |
⬥ BS3621 or equivalent (TS007 3-star, EN1303 grade 6)
Euro cylinder sizing
Sizing — three references + how to measure your own
Getting the cylinder length right matters: too proud and it's vulnerable to snapping; too short and the key won't fully engage. Three common sizes, plus a four-step self-measure so we can quote without a site visit on straightforward jobs in Maidstone.
- 35 / 35 70 mm symmetrical
- Flush both sides. Common on Maidstone new-build composites where the frame uses a matched profile.
- 40 / 45 85 mm offset
- More common on UPVC front doors with a thicker external profile. The longer end faces outside.
- 45 / 55 100 mm (rarer)
- Used where the door is thicker than standard — some older composite doors and certain fire-rated frames.
Compliance
BS3621 & insurance — the short reference for Maidstone installs
The total cost on a post-war property depends on whether the door is being treated as a standard installation or a remedial installation. Standard: the door is plumb, the frame is square, and the hardware goes in directly. Remedial: door drop or frame settlement needs addressing first — quoted as a separate prep item before the lock installation cost. From £59.
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Timber doors
BS3621 5-lever mortice deadlock
The original BS3621 reference. Kitemarked body, anti-drill, anti-pick, minimum 1000 key differs. Fitted to most insured timber front and back doors.
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UPVC / composite
TS007 3-star euro cylinder + PAS 24 multipoint
"Equivalent" for euro-cylinder doors. 3-star cylinder carries anti-snap, anti-bump, anti-drill. Paired with a PAS 24 door/frame assembly it satisfies most standard clauses.
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High-risk / restricted
EN1303 grade 6 — restricted keyway
Top of the range for cylinders. Keys can only be cut against a signed card. Specified where the risk assessment calls for a registered-key system or multi-property estate control.
Lock Installation in Maidstone — FAQ
Common questions about lock installation in Maidstone.
Can you install a lock on a brand-new door?
Post-war housing generates mixed-door installation queries because the same property can have a 1960s timber internal door alongside an 80s UPVC front door alongside a modern composite back door. Each door is treated as a separate column entry in the matrix — there is no single-spec answer that covers all three. Yes — this is one of our most common installation jobs in Maidstone. Carpenters and joiners often hang the door and leave lock fitting to specialists. We measure the rebate, chisel for a BS3621 mortice case, fit the strike plate, and test through a full key cycle. Finished work looks factory-fit.
Do I need BS3621 on a new installation?
For external doors on Maidstone homes with standard insurance — yes, almost certainly. BS3621 is the minimum most UK home insurers specify on final-exit wooden doors. We fit BS3621 as standard and issue written paperwork confirming the standard for your insurance file.
Can you keyed-alike multiple new locks?
Yes — if you want one key to open your front and rear doors, we supply keyed-alike cylinders on the most common profiles. Arrange at the survey stage so we bring matching parts. This works cleanly on UPVC euro cylinders and on certain mortice profiles.
We've just moved into a new-build in Maidstone — do the locks already meet insurance standards?
Not always. Many Maidstone new-builds come with entry-level euro cylinders on UPVC or composite doors that lack the TS007 3-star anti-snap rating, and sometimes a mortice case that predates BS3621 on the side door. We survey the whole property, identify any hardware gaps, and upgrade to compliant standards on the same visit — with a compliance pack for your insurer.
Also nearby
Areas near Maidstone
we also cover
Our engineers don't just cover Maidstone — we serve the surrounding towns and neighbourhoods too. If you're just outside Maidstone, we can still reach you fast.
- Medway 8.2 mi
- Tonbridge 11.2 mi
- Sittingbourne 10.4 mi
- Sevenoaks 14.5 mi
- Canterbury 17.8 mi
Ready when you are
Need lock installation in Maidstone now?
24/7 dispatch across Maidstone and the ME14 area. Fixed quote before work starts. Free call-out with every completed job.