24/7 · SO14 · DBS checked engineers
Lock Installation Service in Southampton
Lock Installation throughout Southampton and nearby Eastleigh, 24/7, any day of the year — average response 22 minutes. Free call-out with every job — fixed price agreed before any work starts.
Other locksmith services in Southampton need lock changes, repairs, upgrades or commercial help instead?
All services in Southampton →For HMO and student properties the key matrix distinction is between the external access-point doors (insurance-schedule spec) and the internal room doors (access-control grade, lighter spec). Match each door type to the relevant column before calling to keep the quote conversation focused.
Fit reference
Southampton doors × lock families — fit reference
The four door types we see most across Southampton and the SO14 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 Southampton.
- 35 / 35 70 mm symmetrical
- Flush both sides. Common on Southampton 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 Southampton installs
On multi-let properties the pricing decision is whether to use a restricted keyway on common-area cylinders. Restricted cylinders carry a higher hardware cost per unit but reduce the per-tenancy changeover cost over the lifetime of the installation — the matrix notes where a restricted keyway is the more economical choice across multiple access points. 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 Southampton — FAQ
Common questions about lock installation in Southampton.
Can you install a lock on a brand-new door?
On multi-let properties the installation brief usually involves a restricted-keyway decision: common-area cylinder on a master scheme, individual rooms on separate pins — or simpler individual cylinders that can be rekeyed independently. Yes — this is one of our most common installation jobs in Southampton. 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.
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.
Do you install locks on gates and outbuildings?
Yes — weather-rated padlocks, BS-grade hasps, garden gate locks, and shed/garage door hardware are all regular installation work across Southampton. We match the lock to the exposure (weatherproofing matters outdoors) and fit on the same visit.
Will a new lock invalidate my door warranty?
Not normally. Most door manufacturers specify that lock installations must be done by a competent locksmith — we are, and we fit to manufacturer-approved positions and dimensions. If in doubt, mention the door brand when you call and we'll confirm compatibility before attending.
Also nearby
Areas near Southampton
we also cover
Our engineers don't just cover Southampton — we serve the surrounding towns and neighbourhoods too. If you're just outside Southampton, we can still reach you fast.
- Eastleigh 5.4 mi
- Romsey 8.5 mi
- Fareham 11.2 mi
- Winchester 12.8 mi
- Portsmouth 21.8 mi
Ready when you are
Need lock installation in Southampton now?
24/7 dispatch across Southampton and the SO14 area. Fixed quote before work starts. Free call-out with every completed job.