The cost to replace a standard lock in the UK starts from around £40 for the lock and fitting would be around the same price. Over 50% of people who buy a house do not change the locks, which is very surprising because of the low cost and increased security.
The Yale front door lock is one of the most common locks in the UK and provide reasonable security with their self locking mechanism, however their are much more secure locks on the market.
It is possible to fit locks yourself if you have the correct tools, however for piece of mind it is well worth employing a professional locksmith to replace the locks. For more information on lock replacement click here for full details.
For additional security it pays to install an additional deadlock which provides increased security. These range from between £25 to £100 depending on type and make of lock. If you are in the UK it is recommended that you have a deadlock fitted that complies with British Standards. One of the most secure is The British Standard BS3621 5 lever deadlock which is insurance approved and offers the maximum security level. This type of lock is recommended by insurance companies and the police.
Many insurance companies will not cover your property unless the final exit door is fitted with a mortice deadlock with at least 5 levers or is fitted with a lock conforming to BS3621 or to a higher specification.
When you are taking out home insurance do not lie, if you have not got a 5 lever or BS 3621 lock on your front door, do not say you have, as making a false statement could invalidate your insurance.
If you are unsure ask a qualified locksmith who will be able to advise you and fit the required lock to meet these standards.
How to fit a mortice lock
Nightlatches should only be used as secondary locks and must not be used as the sole lock on the door. A mortice deadlock will require a key to both lock and unlock it and should carry the kitemark and be manufactured to BS3621