LOCKSMITH & SECURITY ADVICE · REVIEWED 13 NOVEMBER 2026
Lost or stolen house keys
Getting a new key restores access; it does not stop a missing key from working.
Think about continued access
If keys were stolen or can be linked to your address, arrange a security assessment promptly. Ask whether changing the relevant cylinder or lock will prevent use of the missing keys; replacing the whole door is not automatically necessary.
- Report theft through the police non-emergency route unless there is immediate danger or a crime in progress, when you should call 999.
- For rented homes, communal entrances or a master-key system, contact the landlord, managing agent or system owner.
- If a fob is missing, ask the system manager about revoking it.
Agree the replacement
Check insurance before commissioning work if safe. Confirm the estimated call-out cost before booking, the work estimate before starting and any extra charges before agreeing them.
- List which doors the missing keys open, including sheds and garages.
- Ask how many new keys are included and whether existing spare keys will still work.
- Store replacement spares securely without a label identifying the property.
Sources & review
Original directory guidance based on the sources below, checked13November2026. It is general information; confirm your own equipment, policy, access rights and circumstances.