Changing the Locks When You Move into a New Home

When you complete on a property purchase, the solicitor hands over a set of keys — but that set rarely represents every copy ever cut. Estate agents routinely hold spares during viewings. Builders and tradespeople carry keys during renovation work. Previous tenants (if the property was ever let) may have handed copies to friends or family. Even the most trustworthy vendor cannot account for every key that left their possession over the years. The only way to be certain that nobody else has access is to change the cylinder or the lock entirely, so that any existing key becomes useless overnight.

There is also an insurance angle worth knowing about. Many home contents and buildings insurers require that front doors meet BS3621 — the British Standard for insurance-rated security locks. If your door does not already have a compliant lock in place, changing it on arrival is a practical necessity rather than just a preference. A skilled locksmith London can confirm whether your existing lock meets the standard and, if not, fit one that does while you are still unloading the removal van.

The term 'changing the locks' can mean two different things depending on the type of door you have, and it is worth understanding the distinction. On a uPVC or composite door, the operative part is the euro cylinder — the oval barrel that your key turns. Replacing the cylinder takes roughly fifteen to twenty minutes per door, causes no damage to the door or frame, and leaves everything looking exactly as it did before. On a traditional timber door with a 5-lever mortice deadlock, the locksmith removes the entire lock body from inside the door and fits a new one, then adjusts the keep in the frame if needed. This takes a little longer but is still a straightforward job for an experienced locksmith.

If you have a Yale-type nightlatch on your front door as well as a mortice deadlock — which is common on older Camberwell terraces — both should be addressed at the same time. Leaving one unchanged defeats the purpose of the other. A good locksmith will assess both locks and give you a clear up-front quote before any work begins, with no surprises when the job is done.

Camberwell has a large and growing stock of uPVC and composite front doors, particularly in converted flats and more recently built properties. These doors use a multipoint locking system operated by a euro cylinder, and they are genuinely secure — but only if the cylinder itself is up to standard. Standard euro cylinders are vulnerable to a technique called cylinder snapping, where the visible part of the barrel is broken off with a bump or snap tool, exposing the mechanism and allowing the door to be opened in seconds without a key.

The solution is straightforward: fit an anti-snap, anti-pick, anti-drill cylinder that carries a TS007 3-star rating. These cylinders are engineered to shear internally if force is applied, leaving the lock engaged rather than defeated. When we carry out a door lock replacement London, we always recommend and stock TS007 3-star cylinders for uPVC and composite doors — they are the most practical upgrade a new homeowner can make, and they satisfy most insurers' requirements. If you are not sure whether your current cylinder is anti-snap rated, it is worth checking before you assume you are protected. Call us on 020 3757 5826 and we can advise you over the phone before you book anything.

Many of Camberwell's older properties — particularly the period terraces around Camberwell Church Street and the streets running off Peckham Road — still have traditional timber front doors with a 5-lever mortice deadlock let into the door stile. The 5-lever standard matters because it is the minimum required by most insurers; a 2-lever lock, which looks almost identical from the outside, offers very little resistance to a determined attack and will often void a home insurance claim if a break-in occurs.

When we carry out a lock change London on a timber door, we fit a BS3621-rated 5-lever mortice deadlock and check that the box keep in the frame is correctly aligned and in good condition. We also look at the condition of the door itself — a solid lock in a weak frame offers limited protection. If there are signs that the frame needs reinforcing, we will tell you honestly rather than simply fitting the lock and leaving. It is also worth noting that if you are moving into a leasehold flat in a Camberwell block of flats, you may need to check with your managing agent or housing association before changing the communal entrance lock, though your own flat's front door is generally yours to secure as you see fit.

Moving day is chaotic, and it is one of the more common occasions when people find themselves locked out of their house — keys buried in a box, left on the old property, or simply lost in the confusion of the day. If you find yourself locked out London on moving day or at any other point, the first sensible steps are to check whether anyone else has a spare key, look at whether a back door or ground-floor window has been left on the latch, and confirm you are at the right address (it happens). If none of those options resolve the situation, calling a professional locksmith is the right move — do not attempt to force entry yourself, as you risk damaging the door, the frame, or injuring yourself, and you may alert neighbours unnecessarily.

What to do when you are locked out of your house is a question we answer regularly for Camberwell residents. Our team operates as a 24 hour locksmith London, covering the SE5 district and the surrounding area around the clock, including evenings, weekends and bank holidays. We send a locksmith straight away and are usually with you in about 30 minutes. We will ask you to verify that the property is yours — this is standard practice for any responsible locksmith and something you should expect and welcome — and then we will get you back inside without unnecessary damage to your door. If you are ever unsure what to do when you get locked out of your house, the short answer is: check the obvious alternatives first, then call us on 020 3757 5826 rather than attempting anything that could make the situation worse or more expensive to fix.

Before your locksmith arrives, it helps to know roughly what you have on each door so the visit goes smoothly. For a uPVC or composite front door, check whether you can see the oval euro cylinder profile around your keyhole — if so, it is almost certainly a cylinder replacement job. For a timber door, look at the edge of the door when it is open: a mortice lock will have a rectangular case set into the door stile, with a bolt that shoots out when you turn the key. If you have a nightlatch (a Yale-type lock with a small spring latch and a round cylinder on the face of the door), that is an additional lock to address. Write down what you can see before you call, and our team can confirm on the phone what will be needed and give you an exact quote — the factors that affect the final price include the type of lock, the number of doors, the parts required, and when you need the work done.

As an emergency locksmith London, we are set up to respond quickly, but we also offer planned lock changes for new homeowners who want to book in advance. There is no difference in the quality of the work — the same trained, experienced locksmiths attend both emergency call-outs and pre-arranged appointments. We are fully insured, and we confirm an exact up-front price before any work begins, so you always know where you stand. If you are moving into a new home in Camberwell or anywhere in the SE5 area and want to get the locks sorted properly from day one, call us on 020 3757 5826 — we are available 24/7 and happy to talk through your options before you commit to anything.