Smart locks and tenancies: what each side needs to check

Smart locks in rented homes rarely go wrong technically. They go wrong because nobody agreed in advance who is allowed to change the lock, who holds the master account, and what happens at the end of the tenancy.

Most tenancy agreements treat the lock as part of the property and prohibit alterations without consent. In practice landlords often say yes, because a keyless lock removes the lost-key problem they end up paying for — but get it in writing, and agree up front whether you reinstate the original lock when you leave. Keep the old cylinder in a drawer; it is the difference between a clean handover and a deduction.

Prefer a lock that fits the existing hardware without new holes. Anything that requires drilling a fresh cutout is much harder to reverse and much harder to get agreed.

A smart lock does not change the fundamentals: your tenant has exclusive possession, and you still need notice to enter. A lock that lets you see comings and goings, or revoke access remotely, is not a route around that — using one to restrict access can amount to harassment or unlawful eviction, which is a criminal matter, not a tenancy dispute.

Audit logs deserve the same care. Records of when a person came and went are personal data, and keeping them because the lock happens to generate them is not a reason under UK GDPR. Decide what you actually need, and tell the tenant.

This is where a straightforward job becomes a specialist one. A fire door's certification depends on the door, frame and hardware as a tested assembly; fitting a lock that was not part of that assessment can invalidate it. Communal entrances in blocks add the freeholder, the managing agent and often a leaseholder consent process on top.

None of that means it cannot be done. It means it is not a decision for one flat's tenant, and a general guide is not the place to settle it — get advice on the specific building.

The most-missed question. Whoever owns the admin account can issue and revoke every code, and handing a property over without transferring it leaves the previous holder with access long after they should have it. At the end of a tenancy, changing the codes is not enough — check who is still on the account, and remove them.