Why Landlord and Tenant Lock Changes Matter at Every Tenancy Handover
Legally, a landlord cannot change the locks on an occupied property without the tenant's consent — doing so is treated as unlawful eviction. Equally, a tenant has no right to change the locks during a tenancy without the landlord's written permission. The safe, correct moment for a lock change is at the formal handover: when keys are returned, the inventory is signed off, and the previous tenant has vacated. At that point, changing the cylinder or the whole lock mechanism is not just sensible — many buildings insurance policies and landlord insurance products now expect it. If you are unsure whether your policy requires a BS3621-rated 5-lever mortice deadlock or a TS007 3-star anti-snap euro cylinder on a uPVC door, our technicians can advise on the spot and fit a compliant replacement.
For tenants moving in, the concern is straightforward: you do not know how many copies of the existing key are in circulation. Former occupants, previous maintenance contractors, or even earlier tenants from years back may still hold a copy. A fresh cylinder costs very little relative to the security it restores, and it means you start your tenancy knowing with certainty that you hold all the keys. We work directly with tenants, landlords and letting agents — whoever contacts us is who we deal with — and we confirm ownership or authorisation before any work begins.