Changing the Locks When You Move into a New Home

Think about the full chain of people who may have held a key to your new home before you arrived. The previous owners, their family members, a cleaner, a dog-walker, a neighbour who had a spare, a letting agent if the property was ever rented, contractors who carried out work during a sale, estate agents with a keysafe code — the list grows quickly. Conveyancing solicitors hand over keys on completion day, but they cannot account for every copy made over the years. In a busy area like Abbey Wood, where the housing stock ranges from purpose-built flats in managed blocks to older converted houses, that chain can be surprisingly long. Changing the locks the moment you take ownership means you start with a clean slate: you know exactly who has access to your home, because you control the keys from that point forward.

There is also an insurance angle worth considering. Many home contents and buildings policies require that front doors are fitted with a British Standard 5-lever mortice deadlock — specifically one that meets BS3621 — and that any euro cylinder on a uPVC or composite door is anti-snap rated. If a lock on your new home does not meet those standards when you move in, a claim could be complicated. Sorting it on day one removes that uncertainty entirely.

[9] Most front doors in the Abbey Wood area fall into one of two categories, and the approach to changing the locks is different for each. The first is the traditional timber door, still common in the older terraces and semis around Knee Hill and the streets backing onto Bostall Heath. These typically have two locks: a Yale-type nightlatch on the upper part of the door and a 5-lever mortice deadlock lower down. Changing the nightlatch means fitting a new rim cylinder and the accompanying keep on the frame. Changing the mortice deadlock means either fitting an entirely new BS3621 lock body into the door — which is what 'how to install a mortise lock in a new door' searches are really asking about — or, if the existing lock body is already up to standard, simply having a locksmith change the cylinder. In the UK we tend to refer to this as changing the cylinder or changing the lock; the effect is the same: old keys stop working and new ones are cut to the fresh mechanism.

The second category is the uPVC or composite door, which you will find on the majority of properties built from the 1990s onwards and on most replacement front doors fitted in recent decades. These use a multipoint locking system — a long faceplate running the height of the door with multiple hooks, bolts or rollers that engage when you lift the handle and turn the key. The key-operated part is a euro cylinder, the oval-shaped barrel that sits in the centre of the door. Replacing the euro cylinder on a uPVC door is a straightforward job for a trained locksmith, but the choice of cylinder matters enormously. Standard euro cylinders are vulnerable to a technique called cylinder snapping, where the visible part of the barrel is broken off to expose the internal cam. Anti-snap cylinders — ideally rated to TS007 3-star — are engineered to sacrifice the outer section cleanly while keeping the locking mechanism intact. If your new home has a uPVC front door, fitting a TS007 3-star anti-snap cylinder is the single most effective security upgrade you can make on moving-in day.

A lock change is also a natural moment to consider whether the existing hardware is worth keeping at all. On timber doors, if the mortice deadlock is old, poorly fitted, or has a damaged case, full door lock replacement London-wide is a routine job for our team — we carry common BS3621 lock bodies and can fit them while you wait. On uPVC doors, if the multipoint mechanism itself is stiff, drops when you lift the handle, or fails to engage all the locking points cleanly, the gearbox inside the door may need attention alongside the cylinder. This is what most people mean when they search for uPVC door lock repair London — it usually involves the gearbox, the handle spindle, or the alignment of the door in its frame, rather than the cylinder alone. If we spot a problem beyond the cylinder during a lock change visit, we will tell you clearly what it is and confirm an exact price before carrying out any additional work. No surprises.

Back doors deserve attention too. Patio doors, French doors and uPVC back doors all use euro cylinders or multi-point mechanisms and carry the same snapping risk as the front. If you are having the front door done, it is worth having the rear checked at the same time. For flats — particularly those in the managed blocks near Abbey Wood station or in the newer developments off Harrow Manorway — there is usually a communal entrance door as well as your own flat's front door. Both deserve attention, though changes to the communal entrance will generally need to be agreed with the managing agent or housing association before work is carried out. If you are unsure, our team can advise you on what falls within your own remit and what requires permission.

[10] While we are focused on lock changes today, it is worth addressing something many new homeowners worry about once they have fresh locks fitted: what to do when you're locked out of your house. It happens — keys left inside, a door that swings shut in the wind, a lock that is stiffer than expected on a cold morning. The practical steps are straightforward and safe. First, check whether any other entrance to the property is accessible — a back gate left unlocked, a window left on the vent. Second, call someone who may hold a spare key: a family member, a trusted neighbour you have already given a copy to. Third, if neither of those applies and you need to get in, call a professional locksmith rather than attempting anything yourself. What to do when you get locked out of your house is not a situation where improvisation helps — an untrained attempt to force entry can damage the door, the frame, and the lock mechanism, turning a quick job into an expensive repair. Can a locksmith open a mortice deadlock? Yes — a skilled locksmith can open a correctly fitted 5-lever mortice deadlock by manipulation or by other non-destructive means in most cases, without damaging the lock. If non-destructive entry is not possible, they will tell you before doing anything that cannot be undone.

If you are locked out and need help now, call us on 020 3757 6072. We are available around the clock — evenings, weekends and bank holidays — and we aim to have a locksmith with you in around 30 minutes. We will confirm an exact price before any work begins, so you know where you stand before we touch the door.

Abbey Wood and the wider SE2 area is well served for emergency locksmith London coverage, but it pays to know what to look for. When you call a locksmith for a lock change — or for any other job — a trustworthy tradesperson will give you a clear, confirmed price on the phone before they set off. The final quote will depend on factors including the type of lock involved, the door material, whether parts need to be sourced, and the time of day — late-night and bank-holiday call-outs carry a higher call-out charge than daytime weekday visits. What it should never do is change substantially when the locksmith arrives. Our team is fully insured, trained on the full range of residential door locks found in this part of London, and experienced specifically in the housing types you find in Abbey Wood, Thamesmead, Plumstead, and the surrounding neighbourhoods. We carry anti-snap TS007 cylinders, BS3621 mortice locks, and the gearbox components most commonly needed for uPVC and composite doors in the area, so a lock change is typically completed in a single visit with no need to order parts. As a 24 hour locksmith London, we do not keep office hours — if moving day runs late, if completion is delayed to the afternoon, or if you simply want the peace of mind that comes with fresh locks before your first night, call us on 020 3757 6072 and we will come straight to you.

Abbey Wood Locksmith offers a comprehensive range of residential locksmith services across Abbey Wood, Thamesmead, Plumstead, Belvedere, and the wider SE2 and DA17 areas. Every job is handled by an experienced, fully insured mobile locksmith. Our services include: emergency lockout assistance for houses and flats; non-destructive entry as the first approach on all call-outs; lock change London for timber and uPVC front doors; euro cylinder replacement on uPVC and composite doors; anti-snap TS007 3-star cylinder upgrades; TS007 3-star cylinder fitting on new installations; BS3621 5-lever mortice deadlock supply and fitting; Yale nightlatch replacement and upgrade; multipoint lock mechanism repair and replacement; uPVC door lock repair London for stiff or failed gearboxes; uPVC door handle and spindle replacement; composite door lock and cylinder servicing; French door and patio door lock repair; back door lock change and security upgrade; door frame and keep repair following a forced entry; full door lock replacement London where the existing hardware is beyond repair; lock upgrade consultations for home insurance compliance; new-build lock change on moving-in day; rental property re-let lock changes for landlords and letting agents; lock change after a relationship breakdown or change of tenancy; communal entrance lock advice for flat residents; sash window lock fitting; door reinforcement and anti-jemmy plate fitting; letter box restrictor fitting; 24 hour locksmith London availability including bank holidays; and same-day lock change bookings.

We cover Abbey Wood (SE2), Thamesmead, Plumstead, Belvedere, Erith, Woolwich, Bexleyheath, Welling, Sidcup, Eltham, Greenwich, and neighbouring postcodes. Whether you are on a quiet residential street in DA17 or in one of the new flat developments that have sprung up near Abbey Wood station since the Elizabeth line arrived, we know the area and we know the door types you are likely to have. Lock change London is our most requested residential service, and we carry the parts to handle it in a single visit in the vast majority of cases.