About Lock Change Locksmith Services
Changing your locks is one of the most common locksmith services in London, whether you have moved into a new property, lost a set of keys, ended a tenancy, or simply want to upgrade your security. It is also one of the areas where pricing varies most dramatically between legitimate locksmiths and rogue operators.
A standard lock change on a residential front door involves replacing the cylinder (the part the key goes into) rather than the entire lock mechanism. For a mortice deadlock, this means a new cylinder and set of keys. For a UPVC door, it means a new euro cylinder. In both cases, BS3621 British Standard locks should be fitted as standard to meet insurance requirements.
All locksmiths listed on LockFind carry BS3621 compliant locks and will fit them as part of any standard lock change. Many also stock higher security options from brands like ABS, Avocet, Ultion, and Brisant, which offer additional protection against lock snapping, picking, and bumping.
A full front and back door lock change to BS3621 standard typically costs £150 to £300 in London including parts and labour. Individual cylinder replacements start from around £65 plus the cost of the lock.