Can a Landlord Change the Locks? A Guide for Tenants and Landlords

The short answer is: a landlord cannot change the locks on an occupied property without the tenant's knowledge and agreement. Doing so while a tenancy is in force — even if rent is overdue — is an unlawful eviction under the Protection from Eviction Act 1977. It carries serious legal consequences, including criminal charges and civil liability. No matter how difficult the situation, a landlord who wants a tenant to leave must follow the correct notice and court-order process. Using a lock change as a shortcut is never an option in law.

There is, however, a completely legitimate time for a landlord to change the lock or cylinder: at the start of a new tenancy, after the previous occupant has left and returned all keys. This is not only lawful — it is good practice. You can never be entirely certain how many copies of a key were made during a previous tenancy, and a fresh cylinder costs far less than the disruption caused by an unauthorised entry. Responsible letting agents in Lewisham routinely arrange a door lock replacement London-wide as a standard part of their between-tenancy checklist.

Tenants often ask whether they are allowed to change the lock themselves. The answer depends on the tenancy agreement. Most assured shorthold tenancy agreements (the standard type used across England) require the tenant to get written permission from the landlord or letting agent before altering any fixture — and locks count as fixtures. Changing them without permission could put the tenant in breach of contract, potentially affecting the return of the deposit.

That said, there is a narrow exception: if a tenant has genuine, documented safety concerns — for instance, following a domestic abuse situation — a court can authorise a lock change even without the landlord's consent, and certain local authority schemes exist to assist with this. Outside of that specific scenario, the practical route is to ask the landlord in writing, explain the reason, and agree that an extra key will be provided. Most reasonable landlords will agree, particularly if the tenant arranges and pays for a professional lock change using a suitable replacement cylinder that meets the building's insurance requirements, such as a BS3621-compliant 5-lever mortice deadlock or an anti-snap TS007 3-star euro cylinder on a uPVC door.

A lock change at the end or start of a tenancy is a straightforward job for a skilled locksmith, typically completed in under an hour on a standard front door. The most common scenario in Lewisham's mix of Victorian terraces, purpose-built flats, and uPVC-fronted properties involves replacing a euro cylinder on a multipoint lock — the type found on most modern composite and uPVC doors. A trained locksmith will remove the existing cylinder, fit a new anti-snap cylinder of the correct size, test the mechanism, and hand over the agreed number of keys. If the door still has an older Yale-type nightlatch alongside a 5-lever mortice deadlock, both may need attention to ensure the property is properly secured.

For landlords managing several properties, a lock change London service that operates around the clock is particularly useful — vacant properties between tenancies can be left in a vulnerable state if the job is delayed. Equally, a new tenant who moves in on a Friday evening and discovers the cylinder is stiff or the keys do not align properly benefits enormously from a 24 hour locksmith London that does not charge a premium simply for working outside office hours. At Lewisham Locksmith, we send a locksmith straight away and are usually with you in about 30 minutes. The price is confirmed with you on the phone before anyone sets off — it reflects factors such as the type of lock, the number of cylinders needed, and the time of day. Call us on 020 3757 5731 and we will give you a clear, up-front quote with no surprises.

Digital and combination locks are becoming more common in rental properties, particularly in house shares and short-let flats where handing physical keys to multiple occupants is impractical. If you have ever wondered how to change the code on a door lock — or more specifically, how to change the code on a Honeywell door lock or a similar branded digital lock — the process varies by manufacturer but usually involves holding a programming button, entering the current master code, then entering and confirming the new code. Many tenants ask how do I change the code on my door lock without calling anyone out; for most consumer-grade keypad locks, the instructions are in the manual or the manufacturer's website, and it takes only a few minutes.

However, there is a critical point for rented properties: if the digital lock is fitted to the main entrance door and was installed by the landlord, the landlord must be given the new code immediately — just as they would be entitled to a physical key. Changing the code without telling the landlord could be treated as the same kind of exclusion as a physical lock change without consent. If the lock is a combination padlock on an internal storage area or a communal bike shed, learning how to change the code on a combination lock is simpler still and usually does not fall under tenancy restrictions. If you are unsure whether a specific lock falls under your tenancy agreement, ask your letting agent in writing before making any change.

Lockouts happen to tenants and landlords alike — a key left inside, a lock that suddenly jams, or a cylinder that fails after years of use. If you find yourself locked out London-style (which is to say, in a hurry, possibly in the rain, and possibly late at night), the first steps are practical ones: check whether any other entrance to the property is accessible, contact a family member or housemate who may hold a spare key, and — if the property is managed — ring the emergency line for your letting agent. Do not attempt to force the door yourself, as this risks damaging the frame, the multipoint lock mechanism, or a uPVC door panel, all of which could leave the property insecure and result in a bill for damage.

If no spare key is available, calling a professional emergency locksmith London is the right move. A skilled locksmith can open the door using non-destructive methods wherever possible, meaning the lock and door remain intact. In cases where the cylinder has seized or been damaged — a known risk with older euro cylinders that have not been upgraded to anti-snap models — a upvc door lock repair London or full cylinder replacement may be necessary. Lewisham Locksmith covers SE13, SE4, SE8, SE14 and surrounding areas around the clock. We are available on evenings, weekends, and bank holidays. Call 020 3757 5731 and we will send someone straight out.

Whether you are a landlord fitting out a newly let flat near Lewisham station or a tenant who has been granted permission to upgrade your front door security, the choice of lock matters. Most home insurers in the UK require at minimum a 5-lever mortice deadlock that meets BS3621 on timber doors, and many also require a BS3621 nightlatch. For uPVC and composite doors, insurers increasingly ask for a 3-star TS007-rated anti-snap euro cylinder — a worthwhile upgrade in any area, including busy parts of south-east London where cylinder-snapping remains a known method of burglary.

A professional locksmith can advise on the right specification for the door type, assess whether the existing hardware is suitable, and carry out a full door lock replacement London where needed. Can a locksmith install a deadlock? Absolutely — fitting a mortice deadlock into a timber door, or upgrading a cylinder on a multipoint lock, is a core part of what a qualified locksmith does. The final cost depends on the type of lock specified, whether new hardware needs to be sourced, and when the work is carried out. We always confirm the price before starting, so there are no unexpected charges at the end of the job.