f you are thinking about changing or replacing door locks (or window) on a house/apartment/flat/bungalow or business, a locksmith vetted by the MLA will be able to fit a replacement lock.

If you have just moved into a new home, the first thing to do is change your door locks.

You may also want to upgrade your locks to comply with insurance standards or need to replace the locks due to damage.

Door Lock Replacement

A local MLA locksmith can fit, replace and change all types of locks such as:

  • uPVC door locks – on front and back doors
  • Garage door locks
  • Euro lock cylinders – anti snap – on front and back doors
  • Mortice Locks – deadlock / sashlock
  • Yale Locks (Night Latches) – on front and back doors
  • Rim cylinders for Night Latches easily replaced
  • Patio door locks

we also tell you how long the job will take to complete.

Changing & Replacing Door Locks

Common Reasons For This

A locksmith can help change & replace house lock if you have lost your keys, the lock is faulty, or are you are locked out of the house.

The most common reasons a new lock will need to be fitted range from the following:

  • Moved into a new home – Moved into a new home/flat/apartment or changed business address and need to retain key authority.
  • Upgrade locks to BS 3621 – Locks require upgrading for insurance reasons (for example your insurance may stipulate that locks have to be British Standard 3621) or for peace of mind.
  • Lost keys – You have lost your house keys, or someone has a key that should not.
  • The lock is faulty or damaged – the lock is beginning to be unreliable and can be hard to operate. (Usually either worn or faulty.)
  • Keyed Alike – changing your locks to keyed alike so multiple locks are opened with one key

How to tell if my locks are British Standard?

To find out if your current locks are to British Standard, look for the BSI kitemark symbol on the faceplate of the lock, this is the part you cannot see when the door is closed.

What type of door are BS3621 standards locks found on?

The type of door is another factor, normally BS3621 locks are found on doors where the frameand door are made of timber.

  • Ground floor exteriors doors usually have BS3621 Standard Locks 
  • Can be fitted on interior doors.

Doors above ground floor are tested to BS8621 which is the same security level and would also carry a BSI kitemark symbol.

Locks that must meet BS3621 Standard

  • Mortice Lock & Cylinder Rim Locks can be required to meet BS3621 or BS8621.

Door Lock Types to Replace and Change

The most common lock types usually found on residential/commercial properties are the below three types of door locks:

1.  Night Latch (often referred to as a Yale type lock)

There are many different types of nightlatches with sizes, which are mostly used on front and back doors.

Nigh latches a locksmith can change:

A locksmith can replace all types of night types and even upgrade your existing rim lock, such as below:

  • Standard Traditional Night Latch
  • Deadlocking night latch
  • Auto dead locking night latch
  • Double locking night latches

About Night Latches

  • How it operates: Pull or ‘slam’ door shut (the door is latch locked) and requires a key to open from outside
  • On the inside:  the latch part of the lock is retracted usually by operating a small lever or handle.
  • Should NOT be the only lock on the door
  • Standards: to meet BS3621 & BS 8621
  • Door types: Used on front/back and other entrance doors and mainly wooden doors

Leading manufacturers of Nightlatch locks:

  • Yale
  • Ingersoll
  • Era

2.  Mortice Locks

This type of lock is normally fitted inside the door, they are difficult to pick open as the lock mechanism is fitted in the door frame.

There are only two sizes available.

  • Security usually ranges between 2 lever and 5 lever British Standard – the more levers usually means the more secure the lock is.
  • Insurance companies prefer this standard as it means the lock has been tested against popular types of attack for a certain period of time.
  • Should ensure your property or business is secure if attacked.
  • Standards: to meet BS3621 & BS8621
  • Door Types: Mortice locks are commonly found on wooden doors & sometimes aluminium

Leading manufacturers of Mortice locks:

  • Union (formally Chubb)
  • Yale
  • Era
  • Asec
  • Securefast

Can you change the lock without a Key?

Key is usually needed

A key is sometimes required to change a euro profile cylinder lock because the cam on the lock needs to be in line with the euro lock body to remove from the door.

Change the lock with no key

If you have no keys and the euro cylinder retaining screw is removed in the usual way, then the euro lock will NOT slide out as the cam is in the wrong position stopping the euro lock from being removed.

A locksmith will be able to attend site and change the euro lock even if no key is available.

Remove the lock non-destructively – They will use an array of specialist tools and knowledge to align the cam in the correct position to remove the euro profile cylinder lock without damaging the door.

KEYS CUT FOR NEW LOCK – Don’t forget when you have changed your locks to have a new set of keys cut.


Can I Fit The Lock Myself?

Fitting and changing any type of lock yourself is a risky thing to do.

You could be putting your property at risk of burglary if you fit the wrong lock or fit the right lock incorrectly, you could be at the risk of lock snapping by fitting the wrong size lock.

1. Lock Standards

There are many standards of locks ( EN1303, BS3621, BS8621, BS10621, TS0071 & 3-star, Kitemark, PAS3621, SS312 Diamond.

You need to know:-

  • What these lock standards mean
  • What minimum requirement your insurance requires
  • Whether to for a higher level for peace of mind

2. Lock Sizes

There are many different sizes of locks, fitting an incorrectly sized euro cylinder can lead to lock snapping.

3. Wrongly Fitted Lock Can Lead to Lock Snapping

Fitting a Euro Cylinder incorrectly can lead to your lock being vulnerable to ‘lock snapping’.

We recommend finding out the most secure lock cylinder to prevent becoming a victim of this crime.


Garage Door Locks – Fitting and Replacements

Locksmiths can even install and replace garage door locks, they can also help with if you need a replacement lock fitting and changing.

If you have an up and over garage door or a roller lock, the lock or handle can easily be changed and replaced.


How much does it cost to change the locks??

For estimated costs please call us – The price a locksmith charges will vary between various locksmiths due to there being no governing body for locksmiths, so there is no price structure that locksmiths have to follow.

The cost to change locks depends on:

1. Where you live
2. The time of day you need the job completing
3. The manufacturer of lock/cylinder you require changing.

We recommend getting a range of quotes from a MLA locksmith in your area.