Lock replacement
Lock Replacement in Lancing for Front, Back and Internal Doors
Call with your postcode for a current arrival estimate.
- 24-hour emergency cover
- No call-out charge
- Price agreed before work starts
Need a Door Lock Replaced in Lancing?
L.M.N Locksmiths Lancing supplies and fits replacement locks for front doors, back doors, internal doors and communal entrances across Lancing, usually in a single visit. People usually ask for one after moving into a new home, losing keys or having them stolen, or finding a lock has worn out or been damaged.
There is no call-out charge. If the lock has failed and you are shut out tonight, the emergency locksmith service answers around the clock.
Which Part of the Lock Actually Needs to Be Replaced?
Most lock problems involve one component, not all of them, because the lock on a typical door is really a collection of separate parts. Knowing which part is at fault is the difference between a targeted replacement and an unnecessary one.
Cylinder, or barrel
Take the lock case first. Located within the door, it houses the components that operate the lock. Timber doors may use a mortice lock case; uPVC and composite doors may use a gearbox tied to a multipoint locking strip. A new mechanism means more work than a new cylinder, and it may be required when the components inside have failed yet the cylinder can still be used.
Lock case or mechanism
The cylinder is the part that takes your key and works with it, and many people call it the barrel. A uPVC, composite or aluminium door typically has a euro cylinder fitted. A cylinder change gives you new keys while leaving the working mechanism and all other door hardware unchanged. Keyed-alike and thumb-turn versions may be available for some doors and products.
The whole of the lockset
Where the cylinder, internal mechanism, handles and fittings are replaced as one, that is a full lockset. It may be the right choice when several components are damaged, compatible parts are no longer produced, or security on the door needs raising.
Our assessment identifies the failed part so that components which remain safe and serviceable are kept. More on our uPVC door lock service and.
Replace a Lock Rather Than Repair It: When Should You?
Should you replace or repair? The honest answer is that a faulty lock does not always need replacing, and a repair, adjustment or minor component change can sometimes get it working reliably again. Before recommending either, we assess the lock and the door, because the choice turns on the failed component, the scale of any damage and whether the lock remains secure.
Usually, replacement is the right call
Replacement tends to be right when keys have gone missing or been stolen and are unaccounted for, or when you have moved into a new home and want earlier keys shut out. It also fits where inspection shows the cylinder or internal parts are worn beyond a dependable repair, where forced entry has damaged the lock past fixing, or where your insurer specifies a lock standard the current one does not meet. You receive new keys when either the key-operated cylinder or the entire keyed lock is replaced.
Repair is often enough here
Repair is worth considering if the lock behaves with the door open but resists once it closes, if the handle is loose while the mechanism still operates, if the key is stiff but the cylinder proves serviceable, or if the door has dropped and no longer meets the frame properly. These can indicate alignment, handle or repair problems rather than a full replacement, though inspection is still needed to identify the cause.
Lock Types Found on Lancing Homes and Businesses
Door types have their own locking systems, so the replacement depends on the door, its current hardware and the component that failed.
Euro cylinders
Swap the euro cylinder on a uPVC, composite or aluminium door and you get new keys, with the rest of the mechanism unchanged. Size it wrongly and the extra projection can reduce security. Depending on door and product, keyed-alike or thumb-turn cylinders may be possible.
Internal door locks
Internal timber doors may carry mortice latches, sashlocks or privacy locks, reflecting the room's use and whether a key, handle or privacy function is needed.
Mortice locks
A mortice lock goes into a timber door's edge, its case housed within the door rather than on top. Some timber final-exit doors use five-lever mortice locks certified to BS 3621. The standard required can differ, so check your insurance policy.
Nightlatches
Surface-mounted inside many timber doors, a nightlatch is what people call a "Yale lock", though Yale is a brand and not a generic name. The rim cylinder may be replaceable without a whole new nightlatch, condition allowing.
Composite door locks
Typically a euro cylinder working with a multipoint mechanism. Replacing the cylinder may not mean replacing the longer mechanism; the existing hardware, its dimensions and the failed component decide.
Multipoint mechanisms
The long locking strip in a uPVC or composite door edge secures it at several points. A complete mechanism is more work to replace than its cylinder and must suit the hardware already fitted.
Changing the Locks After Moving to a New Home
A change of home is a change of keyholders, or at least it should be. On moving into a new home, you may not know how many copies of the current keys are out there, or whether a previous owner, earlier tenants, agents or contractors still have access through them.
Replacing the external cylinders means none of those old keys will work again and the new set is under your control. Where the doors use compatible locks, keyed-alike cylinders may be available, letting one key open several entrances in place of a ring of different keys. Few homeowners know to ask for it, which is a shame, because keyed alike is one of the main reasons to replace every external cylinder in the same visit after moving house.
Locksmith pricing
What Affects the Cost of a Lock Replacement
The cost of replacing a lock comes down to the details, so the most useful thing you can do is describe them when you call. You get a price on that call from what you have told us, and there is no charge for the call-out. The details that count are:
- Whether the cylinder, the lock case or the full mechanism is being replaced
- Which security rating you choose for the new part
- What kind of door it is
- How many doors are being done at once
- The time of day of the visit
You pay for the work carried out, any parts needed, and VAT. Rates outside Monday to Friday, 7am to 6pm, are higher, but the call-out itself is never charged.
What affects the cost?
Service required, time of attendance, lock and door type, labour and parts.
After Lost or Stolen Keys: Replacing Locks
Lost keys are a security question first and a convenience question second. Not every lost key calls for a replacement lock: the answer depends on where it was lost, whether theft was involved and whether the finder could tie it to your address.
Think about what the missing keys can still do. If they cannot be accounted for, they may still open your door, and cutting a duplicate changes nothing about that, because the old lock will carry on accepting them. A cylinder change may be all that is required for doors with a separate replaceable cylinder. The old keys stop working the moment it is changed, a new set is provided, and serviceable handles and hardware remain on the door. For Lancing households, that is usually the most direct way to close the gap.
Locksmith pricing
The Job and How It Works
Three steps take you from a faulty lock to a working one with fresh keys:
- Start by telling us the type of door and what has gone wrong, and if you cannot tell what lock it is, send us a picture.
- We identify the part that needs replacing and quote you a price for the job.
- You receive every key from the new set.
Single lock replacements are usually finished in one visit.
What affects the cost?
Service required, time of attendance, lock and door type, labour and parts.
The Security Standards Your Insurer May Expect
Before you choose a replacement lock, look at your insurance documents. Some home insurance policies specify the type or security standard of lock required on external doors, and what they ask for varies by insurer, policy and door type. If the wording is unclear, ask your insurer directly.
On timber doors, the standard usually discussed is BS 3621. A policy may specify a mortice lock or nightlatch certified to BS 3621 for a suitable timber final-exit door. Note that a five-lever lock is not automatically BS 3621 certified, so check the lock for the relevant marking rather than relying on the number of levers.
Many doors made from uPVC, composite or aluminium have euro cylinders fitted. The recognised anti-snap ratings for these include TS 007 3-star and SS312 Diamond, though the appropriate choice depends on the door, handles and locking system already in place.
Be wary of "insurance approved" as a label. It does not mean every insurer accepts the same lock: certification shows a product meets a recognised standard, and your insurer decides what its policy requires. We can identify the existing lock and its visible security markings, but your insurer should confirm whether a standard meets your conditions. See BS 3621 door locks and anti-snap door locks.
Lock Replacement Across Lancing
Replacement work is booked as an appointment rather than rushed, and we fit locks for homeowners, landlords, letting agents and business premises in Lancing.
Visits can be arranged in North Lancing, South Lancing and Lower Cokeham, anywhere in BN15, and in the parts of BN43 around Lancing, plus Sompting, which has its own page. About 23,000 usual residents live in the area (Census 2021, ONS, output areas approximated to the built-up area).
Local housing affects what we expect to find on a door. In Lancing 37.7% of households are in semi-detached homes, 21.1% in flats, 20.1% in detached homes and 19.4% in terraces (Census 2021 TS044, ONS), and North Lancing is mostly houses. Homes from 1945 to 1982 make up 48.5% of the stock and those from 1900 to 1939 another 32.4%, with 11.4% built from 1983 to 2008, 5.9% since 2009 and 1.8% before 1900 (VOA council tax property stock, 31 March 2026). Doors on homes of that age are often replaced over time, so the lock now fitted may not match the age of the house.
Tenure matters for who orders the work: 73.7% of households own their home and 15.4% rent privately (Census 2021 TS054), so landlords change locks between tenants regularly.
North Lancing is a conservation area (planning.data.gov.uk, designated 1975). A new lock does not alter a door's appearance, but if you plan to replace the whole door, ask the council first; the national data records no Article 4 direction on doors or windows, though that dataset has gaps and the position is unknown.
See all areas we cover.
Emergency and planned locksmith services
Book a Lock Replacement in Lancing
Call 01903 377061 to book a time that suits you, Monday to Friday, 7am to 6pm. There is no call-out charge, and the price is agreed on the call before work starts.
- Phone: 01903 377061
- Booked work: Monday to Friday, 7am to 6pm
01903 377061
Frequently Asked Questions
Do I need a whole new lock or just a new barrel?
Just the barrel, more often than not. People tend to ask for a whole new lock when the euro cylinder is the only part at fault. On uPVC, composite and most aluminium doors, that cylinder can be replaced separately, and you end up with a working lock and new keys. The full mechanism needs replacing only if the gearbox or lock case inside the door has failed, a less common and larger job. We quote on the call from your description; only a different job on site can change it, and you are told before work starts.
How long does it take to replace a door lock?
An estimate needs to reflect the particular lock and the work required. The condition of your door and access to a compatible replacement influence the timing. Of these jobs, a cylinder swap is usually smaller than replacing either a multipoint mechanism or the case of a mortice lock.
Should I change the locks when I move house?
It is worth doing. You cannot know how many keys exist for a new home or who still holds them: previous owners, tradespeople, letting agents and former tenants may all have had copies. Replacing the external cylinders retires every one of those keys at once, and it is usually a quick job. The price is agreed on the call before we attend, with no call-out charge.
I have lost my keys. Do I need the lock replaced or just new keys cut?
For keys that are genuinely lost away from home, or stolen, a new cylinder is the safer choice. Cutting another key restores your access but does nothing about the missing keys, which will still operate the existing lock. Replacing the cylinder retires every old key at once and gives you a new set. Whether it is needed depends on where the keys went and whether anyone could connect them with your address.
Will a new lock meet my home insurance requirements?
The honest answer is that it depends on your policy. Some home insurance policies specify a British Standard BS 3621 lock on suitable timber final-exit doors, or a properly rated cylinder on uPVC and composite doors. With requirements varying by insurer, door type and policy, check your wording or ask your insurer. "Insurance approved" is shorthand: the standard is certified by BSI, but the requirement is set by the insurer.
What is an anti-snap lock and do I need one?
An anti-snap lock resists lock snapping, a way of breaking in by snapping the barrel in two. Its cylinder will usually carry a recognised UK rating such as TS 007 3-star or SS312 Diamond. Whether it is necessary depends on the door and on your insurer. It is one of the more worthwhile upgrades for uPVC and composite front doors and can be fitted in a routine cylinder replacement.
How much does it cost to replace a door lock in Lancing?
It depends on which part is being replaced, the security rating you choose, the door type, how many doors there are and the time of day. A cylinder is the least expensive replacement; a full multipoint mechanism is the most. Tell us about the door when you ring and you get a price on the call, which holds unless the job on site turns out different, in which case you are told before work begins.
Can you replace locks on a rental property between tenancies?
Yes. Changing the external cylinders between tenancies is routine and can normally be booked around a changeover date, on a weekday between 7am and 6pm, rather than treated as urgent. Landlords and letting agents managing several Lancing properties can arrange the work across multiple addresses together. The price for all of them is agreed before work starts, and there is no call-out charge.
Still have a question or need urgent assistance? Call 01903 377061, tell us what has happened and receive a current arrival estimate.