Changing the Locks When You Move into a New Home

From the moment you receive the keys at completion, the clock is ticking. Estate agents typically hold at least one set throughout the sale process, and many sellers leave spares with trusted neighbours or under flowerpots for years without thinking twice about it. If you've bought a property that was previously let, your letting agent or landlord may have distributed keys to multiple tenants, contractors, and maintenance staff over the years. None of those copies are automatically cancelled when ownership transfers. Changing your locks — specifically the cylinders on uPVC doors and the mortice deadlock on timber doors — immediately closes that vulnerability. Insurance policies often quietly require it too. Many home insurers specify that front doors must be fitted with a British Standard BS3621 5-lever mortice deadlock, and if the lock fitted is old or unverified, a claim following a break-in can be complicated. Getting the locks changed properly on moving day satisfies both your personal security and your policy requirements in one visit.

There's also the question of peace of mind. It's genuinely difficult to settle into a new home when a nagging thought lingers about who might still have access. A professional lock change, carried out by an experienced locksmith Orpington homeowners can trust, resolves that completely. It's a one-off task that pays for itself in security and peace of mind from the first night you sleep under that roof.

The majority of homes built or renovated in the Orpington area over the past two to three decades have uPVC or composite front and back doors. These doors use a multipoint locking system operated by a euro cylinder — the oval-shaped barrel that your key turns. Euro cylinders are extremely convenient, but standard ones carry a well-documented weakness: cylinder snapping. A burglar can break a cheap cylinder in seconds with a pair of pliers, defeating the entire multipoint mechanism without making much noise at all. It's one of the most common methods of forced entry in the South East.

When we carry out a door lock replacement Orpington residents request, we strongly recommend upgrading to an anti-snap, anti-pick, anti-drill cylinder that meets the TS007 3-star standard or carries a Sold Secure Diamond rating. These are engineered specifically to resist snap attacks, with a sacrificial break point designed to protect the internal cam. Fitting a 3-star cylinder to your uPVC or composite door is one of the most effective single upgrades you can make to your home's security — and it looks identical to a standard cylinder from the outside. We carry a range of high-quality anti-snap cylinders suitable for all major multipoint lock systems, and we'll measure your existing cylinder and replace it in a single visit with no damage to the door or frame.

Older properties in areas like Chelsfield village, Green Street Green, and Farnborough commonly have traditional timber front doors fitted with two separate locks: a Yale-type nightlatch (the spring-loaded latch you pull shut when you leave) and a 5-lever mortice deadlock set into the body of the door itself. Both should be addressed when you move in, though for different reasons. The nightlatch is what most people use day-to-day, and it's also what most previous key-holders will have copies for. Replacing the nightlatch cylinder, or the entire unit if it's worn, is straightforward. For the mortice deadlock, our locksmith will check the lever count and confirm whether it meets the BS3621 standard your insurer is likely to require. A genuine 5-lever BS3621 mortice deadlock is a meaningful barrier — it's designed to resist picking, drilling, and manipulation — but only if it's in good working order and correctly fitted.

If you're wondering how to install a mortise lock in a new door, that's genuinely a task that benefits from a professional visit rather than a DIY attempt. The mortice pocket must be cut to precise dimensions, the striker plate must align correctly with the keep, and any error can result in a lock that feels secure but fails under pressure. Our team fits and upgrades mortice deadlocks regularly across Orpington and the surrounding areas, and we always check the door and frame condition at the same time — a solid lock fitted to a weak frame offers very little real protection.

A lock change visit is usually quicker than homeowners expect. For a standard euro cylinder swap on a uPVC door, our locksmith will remove the existing cylinder, measure it precisely (the measurement from the centre fixing screw to each end matters), select the correct size replacement, fit it, and check the multipoint mechanism operates smoothly throughout — all typically within 30 to 45 minutes. For a timber door with both a nightlatch and a mortice deadlock, we'll work through each in turn. We carry a range of cylinders and lock hardware in the van, so in most cases there's no waiting for parts to be ordered.

Before we arrive, it helps if you can locate all the keys you've been given for the property, including any tagged spares, and have them ready. If you've already moved furniture in front of the door, make sure there's clear access. When you call 020 3757 6199, we'll ask a few quick questions about your door type and the locks currently fitted — this lets us give you a clear, confirmed price before we travel, so there are no surprises on the day. The factors that shape your quote include the type and number of locks being changed, the parts required, and your location within our service area. We confirm everything up front before any work begins.

Even with fresh locks fitted, life happens. If you find yourself locked out of your house in the first days or weeks of living somewhere new, it can feel particularly stressful when you haven't yet established where the spare key lives or who to call. If you're wondering what to do when you're locked out of your house, the first sensible steps are: check whether any other door or window has been left on the latch, see if a family member or your removal company still has a key on them, and avoid attempting to force any entry yourself — this risks damaging the door, frame, or lock, and can void your insurance. If none of those options apply, calling an experienced locksmith is the right move. A skilled locksmith can gain entry to a deadlock through legitimate, non-destructive methods — protecting your door and lock in the process wherever possible — and will ask for proof of identity and residence before carrying out any work, as standard practice. As your local emergency locksmith Orpington, Chelsfield Locksmith responds to lockouts across the area day and night. We send a locksmith straight away and are usually with you in around 30 minutes. Call 020 3757 6199 any time — including evenings, weekends, and bank holidays.

If you're moving into a flat — particularly one in a block with a communal entrance on a road like Station Road or Homefield Rise — the picture is slightly more involved. Your flat will have its own front door lock, which you can and should change, but the communal entrance lock or entry system is managed by the freeholder, managing agent, or housing association, and you'll need their approval before making any changes there. For tenants in privately rented properties, you should always get written permission from your landlord before changing any lock, and your landlord is entitled to a copy of any new key. We're experienced in working with landlords and letting agents across Orpington and can advise on the right approach if you're unsure. For homeowners, there are no such restrictions — it's your property and your decision from the moment you complete.

Chelsfield Locksmith is a fully insured, mobile locksmith service operating across Orpington and the surrounding areas — including Chelsfield, Farnborough, Green Street Green, Petts Wood, St Mary Cray, Knockholt, and beyond. We carry out lock changes, cylinder upgrades, and uPVC door lock repair Orpington residents need, every day of the year. As a 24 hour locksmith Orpington homeowners rely on, we're available for planned lock change visits as well as emergency callouts, so whether you're booking in advance for moving day or you've found yourself locked out at 11pm, the number is the same: 020 3757 6199. We confirm an exact quote before travelling — no vague estimates, no unexpected costs on the doorstep. Our team is trained, experienced, and treats every home with care and respect.

Here is a full list of the specific services our mobile locksmith team provides across Orpington and surrounding areas: uPVC door euro cylinder replacement; anti-snap cylinder upgrade (TS007 3-star); composite door cylinder replacement; 5-lever mortice deadlock fitting (BS3621); Yale-type nightlatch replacement; multipoint lock mechanism repair; multipoint lock mechanism replacement; door lock replacement on front doors; door lock replacement on back doors; door lock replacement on French doors; uPVC door lock repair; door alignment and adjustment (drooping doors causing lock failure); door handle and gearbox replacement on uPVC doors; emergency lock change after a break-in; emergency lock change after a lost key; lock change on moving day; lock upgrade to meet home insurance requirements; non-destructive lock entry when locked out; wooden door lock fitting; flat front door lock change; communal door lock advice; lock cylinder measurement and sizing; anti-drill lock cylinder supply and fitting; anti-pick lock cylinder supply and fitting; deadlock (mortice deadlock) replacement; patio door lock repair; uPVC back door lock repair; letter box security upgrade; door reinforcement advice; and free security assessment during any lock change visit.