Landlord & Tenant Lock Changes

A tenancy changeover is a moment of genuine security risk. Keys issued during a previous tenancy may have been copied and passed on without anyone's knowledge — to a former partner, a friend, or a tradesperson who was never asked to return them. Unless the cylinder or lock mechanism is physically changed, there is no way to know exactly how many people still have working access to the property. This is true whether the door is fitted with a traditional Yale-type nightlatch and a 5-lever mortice deadlock, or a modern uPVC or composite door with a multipoint lock and a euro cylinder. A lock change at the end of each tenancy removes that uncertainty entirely and gives the incoming tenant confidence from day one.

For landlords, the step also makes practical sense from an insurance perspective. Many home insurance and landlord insurance policies ask that external doors are secured with locks that meet BS3621. If the existing hardware is old, worn, or simply not up to that standard, a tenancy changeover is the ideal moment to upgrade rather than carry out a piecemeal repair later. Our team can advise on the right specification for your door type while we are on site, so you leave with hardware that works and that your insurer is likely to accept.

For a typical Lewisham terraced house or maisonette, a lock change at tenancy changeover usually means replacing the euro cylinder on the front door multipoint lock, or swapping out the nightlatch cylinder and the 5-lever mortice deadlock. On uPVC and composite doors — common across the borough's newer builds and converted flats — euro cylinder replacement is the standard approach. Where a property has rear access through a uPVC patio door or French doors, we change those cylinders at the same time so that the whole property is secured in one visit.

One of the most important things we do before starting any work is assess whether the existing cylinder shows signs of wear or, more seriously, vulnerability to cylinder snapping. Snap attacks — where the euro cylinder is physically broken to expose the cam and open the lock — have affected properties across south-east London. If the current cylinder is not anti-snap rated, we will recommend a TS007 3-star anti-snap replacement, which is a meaningful security upgrade rather than a like-for-like swap. All of this is explained clearly on site, and you confirm an exact up-front price before any work begins — the final quote accounts for the lock type, any parts needed, the time of day, and travel to your postcode district.

Tenants often assume that because a landlord says the locks were changed before they moved in, the property is secure. In practice, it is worth asking your landlord or letting agent to confirm that the cylinder has been physically replaced — not just that the previous tenants returned all their keys. If you have recently moved into a flat or house in Lewisham and have any doubt about the lock history, our team can carry out a door lock replacement London tenants can arrange independently. We are happy to work with tenants directly, and we always advise checking your tenancy agreement first, as some agreements require the landlord's written permission before alterations to locks are made.

If you have locked yourself out of your new home — especially in the first few days when spare keys have not yet been cut — do not attempt to force entry yourself. Check whether a window is accessible from a safe height, ask a neighbour whether a spare key was left with them, or contact your letting agent if they hold one. If none of those options are available, call us on 020 3757 5731 and we will send a technician straight away; we are usually with you in about 30 minutes. Our approach is damage-free wherever the existing lock and door condition allows, which protects both the door and the tenant's deposit.

Tenancy changeovers do not always happen at convenient times. A landlord in Lewisham might find out late on a Friday evening that a tenant has vacated unexpectedly, leaving the property unsecured over the weekend. A letting agent managing multiple properties in SE13 or SE6 may need a lock changed before a new tenant collects keys on a Saturday morning. As a 24 hour locksmith London landlords and agents can call at any hour, we treat out-of-hours jobs with the same care and professionalism as a standard weekday visit — our technicians are trained and insured, and they carry a range of cylinders and lock hardware in their vans so that most jobs are completed in a single call-out.

We also cover situations where a landlord needs to legally re-enter a property that has been abandoned. This is a specific area where the correct process matters enormously — a landlord cannot simply change the locks on an occupied tenancy without following the proper legal route, as doing so constitutes an unlawful eviction. If you are unsure of your legal position, we will carry out the physical work once you are satisfied you have the right to proceed; we are not in a position to advise on tenancy law, so we always recommend speaking with a solicitor or your local council's private rented sector team before instructing us in those circumstances. For standard end-of-tenancy lock changes where vacant possession has been confirmed, call 020 3757 5731 — we answer 24/7.

Lewisham has a large and varied private rented sector, with significant concentrations of houses in multiple occupation around Deptford, Catford, and Lee, as well as a growing number of purpose-built flats near Lewisham station and along the DLR corridor. We work regularly with individual landlords who self-manage their properties, with letting agents based in and around the town centre, and with housing associations responsible for communal blocks. For letting agents managing a portfolio of properties, we can be added to your preferred contractor list and respond to lock-change requests across your managed stock without the need for repeat quoting processes — just one call and we are on our way.

Our mobile operation means there is no call to a distant office and no waiting for a part to be ordered. The technician who answers your call is the same person driving to your property with the parts already in the van. That matters when a Lewisham postcode needs to be secured before 9am on a Monday morning or when a tenant calls on a bank holiday Sunday having lost their only key. We cover the full Lewisham borough and surrounding SE and BR postcode districts, and we keep the process straightforward so that managing a tenancy changeover does not become a logistical problem.