Lost Your Keys? Here’s When You MUST Change Your Locks
Locksmiths • January 27, 2026
Losing your keys can feel like a minor inconvenience but it can be a real security risk.
When you must change your locks
You should always consider changing your locks when:
- You’ve lost your keys and you’re unsure where they are
- Keys are stolen
- You’ve moved into a new home
- Someone with access is no longer trusted (e.g., former tenants)
- The locks are old or worn
Rekeying vs changing
- Rekeying – the lock stays the same, but the internal mechanism is reset so old keys no longer work.
- Changing locks – the entire lock (plus keys) is replaced.
A locksmith can advise which option is best for you based on cost, security, and convenience.
Pro tip
Upgrading to British Standard anti-snap and anti-bump locks increases protection and helps meet many insurance requirements.
SMS Locksmith can replace your locks with high-security options tailored to your home or business.
This is one of the top questions people ask before calling a locksmith. Rekeying what it means Rekeying resets the lock’s internal mechanism, so only new keys work. It’s cheaper and fast. Good for: Lost keys (but lock itself is fine) Moving house (if the existing locks are in good condition) Replacing when it’s better Changing the whole lock is best when: Locks are old or damaged You want stronger security You’re upgrading to smarter or multi-point systems A locksmith will recommend the best option after inspecting your hardware.
People searching for a locksmith often worry about cost before they call. So let’s break it down clearly. Typical locksmith pricing Costs depend on: Whether it’s an emergency call-out The time of day Type of service (e.g., unlock, change lock, install new security lock) Parts required Example ballpark figures Emergency opening (no lock change): £60–£150 Lock change (cylinder replacement): £80–£200+ UPVC multi-point lock repair: £100–£250+ High-security lock fitting: £150–£350+ These are typical ranges a local locksmith will confirm before work starts. Tips to avoid surprises Ask for a firm quote before work Confirm whether VAT is included Check if emergency call-outs cost extra Request parts costs upfront SMS Locksmith gives transparent quotes up front , so you’re never left guessing.
