Changing the Locks When You Move into a New Home

Think about the lifecycle of a typical set of house keys before they reach you. The previous owner may have lived there for a decade, lending keys to family members, cleaners, dog-walkers, and tradespeople. If the property was rented, there could be multiple former tenants, and each one may have had a key cut without telling the letting agent. Even a diligent estate agent cannot account for every copy made informally over the years. The moment you complete on a property, you are legally responsible for it — and legally entitled to change every lock without notice to anyone.

There is also a practical insurance angle. Many home contents and buildings insurance policies in the UK require front doors to be fitted with locks that meet BS3621 — the British Standard for thief-resistant locks. If your locks are old, damaged, or simply unknown in specification, your insurer may not pay out in the event of a break-in. Arranging a door lock replacement London insurers recognise as compliant is not just peace of mind — it can be a policy condition. Our team will tell you exactly what standard your new locks meet before any work begins.

Most traditional timber front doors in Bermondsey and across south-east London have two locks: a Yale-style nightlatch near the top of the door, and a 5-lever mortice deadlock set into the body of the door further down. These work together — the nightlatch handles the everyday in-and-out, while the mortice deadlock provides the serious security when you go to bed or leave the house for any length of time. When we carry out a lock change London homeowners with timber doors need, we typically replace both, ensuring the new 5-lever mortice deadlock carries the BS3621 kite mark.

[7] The process involves removing the old lock bodies and fitting new ones, which also means issuing you with a fresh set of keys. In the UK, changing the cylinder or the whole lock unit is the standard approach, and it gives you a clean, documented start with hardware that has a known history. If you have a back door — common in Bermondsey terraces with garden access — we will assess that at the same time, since a strong front door means little if the rear remains vulnerable.

uPVC and composite doors — now extremely common in Bermondsey's newer conversions and housing association properties — work differently. They use a multipoint locking system: when you lift the handle and turn the key, multiple bolts shoot into the frame at different points along the door's height. The key itself operates through a euro cylinder, which is the small barrel visible in the middle of the lock. This cylinder is the component that gets changed during a uPVC door lock repair London job, and it is also the component that attracts the most attention from opportunist burglars.

Cylinder snapping is a well-documented method of attack in which a burglar snaps the euro cylinder in two using a tool, exposing the internal cam and opening the door in seconds. If your uPVC door has a standard euro cylinder — particularly one that protrudes more than a few millimetres beyond the door plate — it is at genuine risk. When we carry out a door lock replacement London residents with uPVC doors need, we fit anti-snap, anti-pick, anti-drill cylinders, ideally rated to TS007 3-star. These are designed so that if an attempt is made to snap the cylinder, the internal mechanism disengages rather than surrendering. It is one of the most cost-effective security upgrades available to any homeowner, and we carry the right sizes to fit most standard uPVC and composite door configurations.

When you call Bermondsey Locksmith to arrange a lock change, we ask a few straightforward questions: what type of door is it, how many locks need changing, and whereabouts in the area are you — whether that's SE1, SE16, or the surrounding postcodes. We confirm an exact, up-front quote on the phone before anyone travels to you, so there are no surprises when the job is done. The factors that influence the final quote include the type of lock, the number of doors, the specific cylinder size needed for uPVC doors, and the time of day — evening, weekend, and bank holiday call-outs are priced differently from standard hours, and we are transparent about that before we begin.

On arrival, our locksmith will assess each door, confirm the right hardware, and carry out the replacement — usually within an hour for a standard two-lock timber door job, or slightly less for a single euro cylinder swap. You receive all new keys, and we can advise on whether your existing locks meet BS3621 or TS007 standards if you need to confirm compliance for your insurer. If you are moving into a flat in a block, bear in mind that your front door is your own to change, but the communal entrance door may be managed by a managing agent or housing association — we can advise on who to contact for that. If you have any concerns about security on the day of your move, do not hesitate to call us on 020 7871 2569 — we operate as a 24 hour locksmith London homeowners and tenants can reach at any time.

Even the most organised move can go sideways. Knowing what to do when you're locked out of your house — especially on moving day, when stress levels are high and keys are being passed between removal teams and family members — is worth thinking about in advance. The first sensible steps are always the same: check whether anyone else has a key, check whether a window or back door has been left unlocked, and confirm you are at the right address (it sounds obvious, but it happens on moving day). If none of those options apply, the right call is to contact a professional locksmith rather than attempt to force entry yourself, which risks damaging the door, the frame, or the lock — and potentially invalidating your buildings insurance.

[8] A skilled locksmith can open most standard residential locks without damage to the door, using legitimate, non-destructive methods. Can a locksmith get into a deadlock or a uPVC multipoint lock? In the vast majority of cases, yes — experienced locksmiths carry the tools and have the trained knowledge to open timber door mortice locks and uPVC multipoint systems without drilling or forcing. If the lock cannot be opened non-destructively, we will explain clearly before proceeding with any alternative approach, and replacement parts are fitted on the same visit. We cover Bermondsey and the wider SE1 and SE16 postcode districts, and we send a locksmith straight away — we are usually with you in about 30 minutes. If you are asking what to do when you get locked out of your house on moving day, the short answer is: stay calm, check your options, and call 020 7871 2569.

Bermondsey Locksmith is a fully insured, mobile locksmith service operating across Bermondsey, London Bridge, Rotherhithe, Borough, and the surrounding area. We work as an emergency locksmith London residents can reach at any hour — including evenings, weekends, and bank holidays — and we carry out planned lock changes just as readily as urgent call-outs. Our services include: 5-lever mortice deadlock supply and fitting; Yale nightlatch replacement; euro cylinder replacement for uPVC doors; anti-snap cylinder upgrades to TS007 3-star; multipoint lock repair and replacement on uPVC and composite doors; BS3621 compliant lock fitting for insurance purposes; front door lock change on timber doors; back door lock replacement; communal flat door lock assessment and advice; non-destructive lock opening for lockouts; timber door lock-out assistance; uPVC door lock-out assistance; composite door lock-out assistance; lock change after a break-in; emergency boarding if a door cannot be secured after a forced entry; lock change after lost or stolen keys; lock change on moving day; nightlatch and deadlock combination fitting; sash lock fitting and repair; door furniture and handle replacement when linked to a lock fault; uPVC door handle replacement when the multipoint mechanism has failed; door alignment and lock engagement checks; security assessment for newly purchased properties; lock upgrade advice in line with current insurer requirements; and same-day lock change appointments across SE1 and SE16.