A changed lock can involve security, privacy, domestic abuse or a contract dispute. Establish the reason and the legal position before demanding entry or replacing it again.
Establish the circumstances
- Ask whether the old lock failed, keys were stolen or someone posed a threat.
- Check whether other lawful occupiers are affected.
- Keep sensitive safety information restricted and ask which contact method is safe.
Check the property and contract
- Read the applicable terms and obtain advice if the tenant's right to change locks or provide a key is disputed.
- Check fire-door performance, communal access and any master-key arrangement.
- Separate routine inspection access from a genuine emergency.
Resolve proportionately
- Agree suitable security and access arrangements where possible.
- Use the lawful access route for necessary work if agreement fails.
- Record costs and responsibility only after the facts and payment rules are checked.
Example: the tenant fears an abusive former partner
A fictional tenant changes a lock after a threat. Check safety and occupancy rights before giving the former partner a replacement key or insisting on the old arrangement. A routine key-management policy must not override the actual risk.
What to do
- Ask for the reason and check immediate safety concerns.
- Review the contract, door requirements and lawful access rights.
- Agree a documented solution or obtain advice.
Evidence to keep
- Tenant report, relevant contract terms and lock specification.
- Access proposals and any agreed arrangement.
Sources and guidance
- Harassment and illegal evictionUK Government · checked 20 October 2026
- Standard occupation contracts: guidance on the termsWelsh Government · checked 20 October 2026
- Access for repairs and inspectionsScottish Government · checked 20 October 2026