For securing our homes in Hammersmith and across West London, upgrading to an anti-snap 3-star cylinder lock is a wise move. These locks provide robust protection against break-ins, meeting UK insurance standards for enhanced protection. At Jaspe Locksmith, we fit them week in, week out, and the job is quicker than most people expect. Here's why this upgrade is essential and what happens during the installation.
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When moving into a new home in West London, altering the locks is essential to secure safety. We all know keys could be floating around with previous tenants, agents, or even contractors. Swapping the cylinder on the same day is a smart move.
Beyond new tenancies, there are several scenarios where changing locks becomes vital:
Each situation is efficiently handled with our guaranteed workmanship, providing security in just 15-25 minutes.

Fixed quote on the call — no callout fee. Insurance-grade locks fitted same day across Hammersmith, Fulham, Chiswick, Shepherd’s Bush and wider West London.
Understanding why people change locks highlights the significance of adhering to UK insurance standards. Every lock change we carry out meets these standards. BS3621 is vital for wood front doors, required by insurers for homes like those in Chiswick and Brackenbury Village. It certifies thief-resistant mortice deadlocks, protecting your property.
The TS007 3-Star Kitemark is essential for modern composite and UPVC doors, offering anti-snap, anti-bump, and anti-pick protection. Common in new builds along the Fulham Palace Road and Lower Mall, it's the gold standard for security.
For high-value properties, the SS312 Diamond Sold Secure certification adds an extra layer of defense often demanded by insurers. Here's a quick comparison:
| Standard | Use Case | Features |
|---|---|---|
| BS3621 | Wood front doors | Thief-resistant deadlocks |
| TS007 3-Star | Composite/UPVC doors | Anti-snap, bump, pick protection |
| SS312 Diamond | High-value properties | Independent attack resistance |
We keep you safe and compliant.
For a straight answer on cost, dial 020 3974 1701.
On the day we change your locks, our process is precise and efficient. We begin by measuring the cylinder length from each side of the center screw. Most West London doors fit 35/35, 40/35, or 40/40 mm cylinders, with longer sizes for thicker doors like those in Brackenbury Village and Chiswick.
Next, we select a matching anti-snap cylinder from our van's inventory. We remove the old cylinder via the center screw on the door edge, slide in the new one, and secure it with the screw. We then test the key turn from both sides to confirm smooth operation.
Once everything's perfect, we hand over three new keys, plus a registered restricted-key card if applicable. We file the old cylinder for your records.
Our entire process typically takes 15-25 minutes, though period doors may require additional time. We bring careful craftsmanship to every installation.

Most UK home insurers require a minimum of BS3621 mortice deadlock on timber doors and a TS007 3-Star-rated euro cylinder on UPVC or composite doors. We fit both and can provide documentation.
A cylinder swap is typically 20-30 minutes. A full BS3621 mortice change on a timber door runs 45-60 minutes. We carry common sizes in the van for a first-time fix.
No callout fee. Fixed quote on the phone before we arrive — nothing changes when we get there.
Yes — we stock TS007 3-Star anti-snap cylinders in common sizes for UPVC and composite doors across Hammersmith, Fulham and Chiswick. If your size isn't in the van we'll order same-day.
Yes — old cylinders, mortice cases, and hardware are taken away with us. You keep the new keys and we provide a receipt detailing the new lock brand and standard.
After efficiently handling cylinder replacements, we turn our attention to mortice deadlock replacement on period wood doors. These doors, with their historical charm, often require careful handling to maintain integrity while upgrading security.
We fit BS3621-rated mortice deadlocks, vital for insurance compliance and optimal protection.
Our process begins with a detailed assessment of your door's condition. We make certain the new lock fits cleanly, preserving the door's aesthetic and structural integrity.
In areas like Brackenbury Village and Chiswick, where Victorian and Edwardian architecture is cherished, this attention to detail is essential.
We prioritize using high-quality materials and precise craftsmanship, so each lock installation enhances security without compromising the door's period character.
Whether you're in a family home in Ravenscourt Park or a mansion flat in West Kensington, our team ensures your property remains secure and stylish.
Let's give you real reassurance with expertly fitted mortice deadlocks.
For replacing multipoint strips on UPVC and composite doors, we know the importance of precision and efficiency. These doors, common across West London's riverside apartments and suburban homes, rely on multipoint locking systems for maximum security.
If your door isn't locking smoothly or feels misaligned, it might be time for a multipoint strip replacement.
Our team is equipped with the four dominant multipoint gearbox brands: Mila Master, GU Ferco Secury, Fuhr Multisafe, and Yale Lockmaster. This means we're ready to perform first-time fixes on most standard calls, ensuring minimal disruption to your day.
We prioritize maintaining your door's integrity while enhancing its security. By choosing the right components and installing them with care, we help fortify your home against unauthorized access.
Let's enhance your door's functionality and security with a multipoint strip upgrade tailored for your specific needs.
Day or night, 020 3974 1701 gets you straight through to us.

Ensuring your property meets insurance standards is essential, especially in West London.
We know that BS3621 and 3-Star standards play a significant role in securing homes and ensuring compliance with insurance requirements.
BS3621-rated mortice deadlocks are a must for wooden front doors, as they're acknowledged by major insurers like Aviva and AXA for their thief-resistant qualities. This is especially relevant for properties in areas like Brackenbury Village and Chiswick.
For modern composite and UPVC doors, the TS007 3-Star Kitemark anti-snap euro cylinders are the gold standard, offering protection against snapping, bumping, and picking.
These are indispensable for new-build apartments along the Lower and Upper Mall riverside and other developments.
Every installation we undertake comes with a workmanship guarantee — our promise that the job is done right. We understand how important security is for your home, and that's why we promise reliability and quality in every lock installation.
This promise covers the full range of services, from fitting BS3621-rated mortice deadlocks to installing TS007 3-Star Kitemark anti-snap euro cylinders.
Our skilled technicians make sure each lock meets the highest standards, like BS EN 1303 and Sold Secure Diamond, providing security for your family and property. We aim for first-time fixes, stocking essential parts for immediate solutions on most calls.
Should any issues arise, you're covered — we come back and put it right. We're dedicated to maintaining your trust and confidence, addressing any concerns promptly.
With us, you're choosing top-tier service and craftsmanship that protects your home—every lock, every time. Let's secure West London together.
Our engineers are DBS-checked and we hold public liability cover — certificate available on request.
Need us now? Call 020 3974 1701.