24/7 · Ickenham & West London
Residential Locksmith
New home, worn-out locks, or an insurer asking for BS3621? We fit insurance-approved locks to houses, flats and period doors, and explain what you actually need before you spend.
- 24/7 cover
- 30–60 min
- No call-out fee
- DBS-checked
- Insurance-approved
Residential Locksmith: The Short Answer
Open-in Security Services fits and upgrades locks on houses and flats across Ickenham, West London, Hertfordshire and South Bucks, within 25 miles of the UB10 base. The work is done by Kenny, the DBS-checked owner, who has been fitting domestic locks since 2006. Most home insurance policies expect a BS3621 five-lever mortice deadlock on timber final-exit doors and a TS007 3-star or Sold Secure Diamond anti-snap cylinder on uPVC and composite doors; both are stocked in the van. Guide prices: euro cylinder replacement from £65, anti-snap 3-star upgrade from £95, BS3621 deadlock fitted from £120, cylinder rekey from £45. Brands fitted include Ultion, Mul-T-Lock, Yale, ERA, Winkhaus and Fullex. Every price is fixed on the phone with no call-out charge, and most single-door upgrades are finished in one visit, with a straight cylinder swap taking about 20 minutes.
Last reviewed by Kenny
Which locks do home insurers ask for?
Most home insurance policies ask for a BS3621 five-lever mortice deadlock or night latch on final-exit doors, and increasingly for anti-snap (TS007 3-star or Sold Secure Diamond) cylinders on euro-profile locks. We fit hardware from Ultion, Mul-T-Lock, Yale, ERA, Winkhaus and Fullex, and hand you the standard your policy references so you can answer the question honestly.
How much does an anti-snap upgrade cost?
Lock snapping is the most common forced-entry method on uPVC and composite doors. A three-star Ultion or equivalent cylinder resists snapping, bumping and picking, and on most doors it is a 20-minute swap with no change to the door itself. Fitted, a three-star cylinder starts at £95 against £65 for a standard replacement, and the figure is fixed on the phone. If you are not sure what is fitted now, we will check and tell you whether it is worth upgrading.
Can you fit new locks to a period or hardwood door?
Older timber doors often carry five-lever mortice locks, rim night latches or original Bramah and Banham hardware. We match the fitting to the door, keeping the period look where it matters, rather than defaulting to a euro cylinder that does not suit it. If a lock is sound but the keys are unaccounted for, a rekey is often all you need.
| Standard | What it means | Where it applies |
|---|---|---|
| BS3621 | Kitemarked five-lever mortice deadlock or night latch, the British Standard most insurers name | Wooden final-exit doors |
| TS007 3-star | Anti-snap cylinder rated on its own, the highest single-part rating | Euro-cylinder uPVC and composite doors |
| TS007 1-star + 2-star | A 1-star cylinder paired with a 2-star security handle or escutcheon to reach 3-star protection | Doors keeping the existing cylinder |
| Sold Secure Diamond | Independent attack-tested rating, often quoted alongside TS007 3-star | High-risk doors and insurer requirements |
Guide Prices
Residential Locksmith: Starting Prices
| Euro cylinder replacement | from £65 |
|---|---|
| Anti-snap cylinder upgrade | from £95 |
| BS3621 mortice deadlock fitted | from £120 |
| Cylinder rekey | from £45 |
Starting prices including fitting. The exact figure depends on the door and the grade of lock your policy needs, and it is confirmed on the phone, not on the doorstep.
See the full price guide →Our Work
Residential Locksmith in the Field
FAQ
Residential Locksmith: Your Questions
What lock does my insurance need?
Most policies specify a BS3621 five-lever mortice deadlock on wooden final-exit doors, and anti-snap (TS007 3-star) cylinders on euro-profile locks. Read us the wording and we will fit exactly what it asks for.
Can you upgrade my locks without replacing the whole door?
Usually yes. An anti-snap cylinder or a new mortice case fits the existing door in most cases. We only recommend a new door or mechanism when the current one has actually failed.
Do you fit locks for landlords and new tenancies?
Yes, rekeys and cylinder swaps between tenancies are routine work. We can key several doors alike so one key runs the property.
Which lock brands do you fit?
Ultion, Mul-T-Lock, Yale, ERA, Winkhaus and Fullex, among others. We fit what suits the door and your insurance, not whatever we happen to carry.
What is the difference between TS007 3-star and a 1-star cylinder?
A TS007 3-star cylinder passes anti-snap, bump and pick testing on its own. A 1-star cylinder only reaches full protection when paired with a 2-star security handle or escutcheon. Both routes are valid; we fit whichever suits your door and budget.
How long does a lock upgrade take?
A euro-cylinder swap is usually 15–20 minutes. A new BS3621 mortice deadlock in a timber door takes longer as the pocket may need cutting. Most homes are done in a single visit.
Need Residential Locksmith?
Tell us the door and what your policy asks for, and the right lock is quoted before we arrive.