Lock Replacement Cost (2026 UK Guide)
Replacing a lock is often necessary after losing keys, moving house or upgrading security. Costs vary depending on the type of lock, security rating and whether emergency call-out is required.
This 2026 UK guide explains average lock replacement costs in the UK, what affects pricing, and when upgrading to high-security locks may be worthwhile.
Average Lock Replacement Cost
| Lock type | Replacement required | Average UK cost |
|---|---|---|
| Euro cylinder lock | Supply and fit cylinder | £90 – £220 |
| Mortice lock | Replace internal lock case | £120 – £300 |
| Night latch (Yale type) | Supply and fit new latch | £100 – £250 |
| Multi-point locking strip | Replace full mechanism | £180 – £450 |
| Anti-snap cylinder upgrade | Install high-security cylinder | £120 – £300 |
| Smart lock installation | Supply and fit smart lock | £200 – £500 |
For a full overview of related services, see our Security & Lock Repair Cost Guide.
When Should You Replace a Lock?
Lock replacement is recommended in several situations.
Common reasons include:
- Moving into a new property
- Lost or stolen keys
- After a burglary attempt
- Lock failure or jamming
- Upgrading to anti-snap security
- Worn internal components
Many homeowners choose to upgrade to anti-snap cylinders for improved security.
What Affects Lock Replacement Costs?
Several factors influence pricing.
Lock type
Standard cylinders are cheaper than multi-point or smart locks.
Security rating
British Standard and high-security locks cost more.
Emergency timing
Evening and weekend replacements increase labour fees.
Door type
uPVC and composite doors often require multi-point mechanisms.
Signs Your Lock May Need Replacing
Early replacement prevents lockouts.
Look out for:
- Key sticking repeatedly
- Visible rust or corrosion
- Lock spinning freely
- Broken internal mechanism
- Door not securing properly
- Previous break-in damage
If the lock no longer engages reliably, replacement is usually safer than repair.
DIY checks you can safely do
- Check lock for visible wear
- Test spare key
- Tighten handle screws
- Measure cylinder length before replacing
- Photograph lock type before requesting quotes
Avoid forcing a damaged lock.
When this is an emergency
- Lock has completely failed
- Property cannot be secured
- Keys have been stolen
- Break-in has occurred
- Lock mechanism has snapped internally
Urgent locksmith assistance may be required.
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