Quick answer
Yes, it's sensible. You can't know how many keys the previous owners, tenants, builders or agents still have. Changing the cylinder is usually quick and is a good moment to fit anti-snap locks.
Why it's worth doing
Keys get lent to neighbours, cleaners, tradespeople and family. Changing the locks means only you know who holds a key.
Some home insurance policies also expect locks to be in good order and to meet a set standard, so check your policy wording.
What usually needs changing
On uPVC and composite doors it's normally just the euro cylinder, which can be swapped without replacing the whole mechanism. Timber doors may have a mortice deadlock and a nightlatch, which can be rekeyed or replaced.
Upgrade while you're at it
Moving in is a good time to fit anti-snap cylinders and BS3621 deadlocks, and to check back doors, side gates and garage doors too.
If you rent
Ask your landlord or letting agent before changing any lock and give them a copy of the new key if your tenancy requires it.
Related services
- Lock Changes — New home, lost keys or a tenant moving out? Change your locks.
- Euro Cylinder Replacement — Worn or vulnerable euro cylinders swapped for anti-snap models.
- Anti-Snap Locks — Protect uPVC and composite doors from lock snapping.