Lock Change After a Break-In
A break-in is a deeply unsettling experience. Whether your front door has been forced on a quiet Cambridge side street off Mill Road, or a would-be intruder has damaged the euro cylinder on a uPVC door at the back of a property in Chesterton, the priority is the same: get the property secured again today, not tomorrow. Chesterton Locksmith is a mobile lock change service operating across Cambridge and the surrounding area, 24 hours a day, every day of the year — evenings, weekends and bank holidays included. Our trained, insured technicians carry a wide selection of replacement cylinders, 5-lever mortice deadlocks and multipoint lock components in the van, so the work is usually completed in a single visit.
Open 24 hours, 7 days a week · Fully insured
This page explains what happens when we attend after a burglary or attempted entry, which parts are typically replaced and why, what factors shape the final quote, and how to ensure the new locks you receive meet your insurer's requirements. If you need help right now, call 01223 912859 and we will send a locksmith straight away — we are usually with you within about 30 minutes.
What we do
Available 24/7
Day, night, weekends and bank holidays — a real local locksmith answers and sends a fully-stocked van.
We come straight away
Based in Cambridge, we send a locksmith straight away — we're usually with you in about 30 minutes.
Fully insured
Vetted locksmiths, a clear price on the phone, and no surprise add-ons when we arrive.
Damage-free entry
We pick and bypass locks the right way, so most lockouts are solved without drilling anything.
What a Lock Change After a Break-In Actually Involves
The term lock change covers several different operations depending on how your door is constructed and how the intruder gained, or attempted to gain, entry. On a traditional timber front door you will usually find a Yale-type nightlatch and a 5-lever mortice deadlock. If a burglar has forced or levered the door, the mortice lock body itself can be damaged beyond adjustment, and the nightlatch faceplate or striking plate may be bent or pulled away from the frame. In that case our technician will remove both mechanisms and fit new ones. Where the door frame has been split or the keep (the metal plate in the frame that the bolt engages with) has been ripped out, we reinforce the fixing before the new lock goes in — a new lock fitted to a weakened frame offers little real security.
On uPVC and composite doors — now the most common front and back door type across Cambridge's newer builds and converted flats — the euro cylinder is the most vulnerable point. Cylinder snapping is a well-documented method of attack: an intruder snaps the outer portion of the cylinder, then turns the remaining stub with a screwdriver. If your door has been attacked this way, the damaged cylinder must be removed and replaced with an anti-snap, TS007 3-star rated cylinder. We stock these as standard. The multipoint locking mechanism itself — the long gearbox running up the edge of the door — is sometimes damaged during a forced entry and may also need replacement. We assess the full door on arrival, not just the most visible damage, so nothing is missed.
Emergency Lock Change Cambridge: Same-Day Security After a Burglary
When police have finished at the scene and the immediate shock has settled, the question becomes: is the property safe to stay in tonight? For many householders and tenants in Cambridge — from student houses near Hills Road to Victorian terraces in Romsey — the answer depends entirely on whether the locks have been changed. Our emergency lock change service is designed specifically for this moment. We come to you, we work around any other trades (boarding contractors, glaziers) already on site, and we do not leave until the door operates correctly and the property is secure.
One call to 01223 912859 is all it takes to get the process started. We will ask a few quick questions about the door type, what damage is visible, and your location, so we can confirm which parts to bring. We also confirm the exact price before anyone travels — there are no surprise additions when the job is done. The factors that determine the final quote include the type of lock and cylinder required, the extent of any damage to the frame or mechanism, the time of day (out-of-hours call-outs carry a different call-out charge, which is always stated clearly upfront), and travel distance within our Cambridge coverage area.
Choosing the Right Replacement Locks and Cylinders
Not every lock that comes off after a break-in should be replaced with an identical product. If the original lock was a standard euro cylinder, this is an opportunity to upgrade to an anti-snap, anti-pick, anti-drill cylinder rated to TS007 3-star. Many home insurance policies specifically require that external doors are fitted with locks meeting BS3621 — this applies to mortice deadlocks on timber doors. If your insurer has this requirement and the existing locks did not meet it, fitting compliant locks now may be essential for your claim and for future cover. Our technicians can confirm whether a replacement lock or cylinder carries the relevant British Standard rating, and we will note this clearly on any paperwork we leave with you.
For landlords, letting agents and housing associations managing properties across Cambridge — including blocks of flats where a communal entrance and individual flat doors are both involved — a lock change after a break-in may need to cover both the communal door and the tenant's own door. We handle both in the same visit wherever possible. We also carry out commercial lock change work: offices, retail units and business premises on and around Newmarket Road or the Science Park can require a rapid response when a door has been targeted overnight. The same principles apply — assess the damage fully, fit to the correct standard, confirm the building is secure before we leave.
After the Locksmith Leaves: Practical Next Steps
A door lock replacement Cambridge residents often overlook is the back door. After a break-in through the front, it is worth having the rear door checked too — not because it was targeted, but because the event is a prompt to audit the whole property. uPVC patio doors and French doors at the rear are frequently fitted with standard cylinders that offer little resistance to snapping. If you are already having a technician on site, it makes sense to ask them to inspect every external door while they are there.
It is also worth reviewing your insurance position promptly. Contact your insurer or broker the same day, let them know what locks have been fitted and request confirmation that the replacements meet policy requirements. Keep the paperwork we provide — it details the make, standard and specification of every component fitted. If you are a tenant, inform your letting agent or landlord immediately; they have a legal responsibility to ensure the property is secure, and our team can liaise with them directly if that helps move things along. For anything else or to book a follow-up visit, call 01223 912859 — we answer 24 hours a day.
Frequently asked questions
How quickly can you get to me after a break-in in Cambridge?
We send a locksmith straight away and are usually with you in about 30 minutes, though this can vary depending on where in Cambridge you are and how busy the roads are at the time. We cover the whole Cambridge area, including CB1 through to the outskirts, so please call 01223 912859 as soon as you need us and we will confirm an estimated arrival time for your specific location.
Will the new locks meet my home insurance requirements?
Many insurers require external door locks to comply with BS3621, which applies to 5-lever mortice deadlocks on timber doors. For uPVC and composite doors, insurers increasingly ask for anti-snap euro cylinders, ideally rated to TS007 3-star. We fit locks that meet these standards and will confirm the specification on the paperwork we leave with you. It is always worth reading your policy wording or speaking to your insurer directly to check their exact requirements, particularly if you are making a claim.
What factors affect the price of an emergency lock change?
The final quote depends on several things: the type of lock or cylinder needed (a standard mortice replacement differs in cost from a multipoint gearbox on a uPVC door), the extent of any damage to the door frame or mechanism, the time of day (evenings, weekends and bank holidays carry a call-out charge that differs from standard hours), and your location within our Cambridge service area. We always confirm an exact price before any work begins, so there are no unexpected additions when the job is complete.
Can you replace locks on a uPVC door that has had the cylinder snapped?
Yes. Cylinder snapping is one of the most common methods of attack on uPVC and composite doors, and it is something we deal with regularly across Cambridge. We remove the damaged cylinder and fit an anti-snap, anti-pick, anti-drill replacement rated to TS007 3-star. If the snapping attempt has also damaged the multipoint locking mechanism inside the door edge, we assess that too and replace it if necessary. The goal is to leave the door both secure and fully operational.
I am a tenant — do I need my landlord's permission to change the locks after a break-in?
In most cases, yes — a landlord's consent is required before changing locks on a rented property, even after a break-in. However, if the property is immediately insecure and you cannot reach your landlord or letting agent, the priority is safety. We can attend and secure the door, provide full documentation of the work, and supply an additional set of keys so your landlord retains access. We would always recommend notifying your landlord or letting agent as quickly as possible and keeping a record of your attempts to do so.
Do you handle commercial lock change jobs, not just houses?
Yes. We carry out commercial lock change work on offices, retail units, workshops and other business premises across Cambridge and the surrounding area. The approach is the same as for a residential property: we assess the damage, confirm which locks or cylinders need replacing, agree the price before starting, and ensure the building is fully secure when we leave. If a break-in has occurred overnight and you need the premises secured before staff arrive in the morning, call 01223 912859 — we operate 24 hours a day.