About this service
BS3621 is the British Standard for thief-resistant mortice locks and the specification almost every UK home insurer requires on external timber doors. We supply and fit BS3621 5-lever mortice deadlocks and sashlocks from Union, ERA, Yale, Chubb and Mul-T-Lock — all Kitemarked, all insurance-approved, all fitted with a 12-month parts and labour guarantee. If your existing lock isn't BS3621 stamped, your insurance claim could be refused after a burglary; we'll tell you on the call whether you're compliant or not.
What's included
- BS3621 5-lever mortice deadlocks and sashlocks supplied and fitted
- Union, ERA, Yale, Chubb and Mul-T-Lock all stocked on the van
- Kitemarked, insurance-approved hardware as standard
- Free compliance check on every external timber door
- 12-month parts and labour guarantee
Our process
Check
We confirm whether your existing lock carries the BS3621 Kitemark.
Recommend
If non-compliant, we quote a like-for-like BS3621 upgrade.
Fit
Mortice lock fitting typically 45–60 minutes per door.
Certify
Written confirmation of BS3621 compliance for your insurer.
Where we cover
We provide bs3621 locks across West London, Berkshire and Buckinghamshire, including: