Landlord Lock Change Checklist for New Tenancies

A change of tenant is the best time to take control of property security. This landlord lock change checklist helps you deal with more than just swapping a cylinder and handing over a fresh set of keys. It is a chance to check every entrance, account for every key, and catch a worn door or failing mechanism before it becomes an out-of-hours call.

Changing locks between tenancies is not a blanket legal requirement in every situation, but it is often the sensible and responsible choice. You cannot be certain how many copies of old keys exist, or who may have had access during the previous tenancy. A straightforward lock change gives both you and your new tenant a clean starting point.

Start before the previous tenant leaves

Do not wait until moving day to find out what keys are in circulation. Ask the outgoing tenant to return all keys, fobs, window keys, garage remotes and communal-entry passes named in the tenancy agreement. Compare them with the number issued at check-in.

Even where every item comes back, consider whether the lock should still be changed. Previous tenants may have lent keys to family, cleaners, dog walkers, tradespeople or former housemates. A returned key proves that one key has come back, not that no copies were made.

Record what has been returned as part of the check-out paperwork. It avoids arguments over deposits and gives you a useful record if there is a later security issue.

Landlord lock change checklist: every access point

Walk around the property rather than focusing only on the front door. A ground-floor window that does not lock properly can be as significant as a tired night latch. Check each point below while the property is empty and there is time to put things right.

• Front and rear doors: test the main lock, any deadlock, night latch, thumbturn and letterbox. Make sure the door closes cleanly without being lifted, pushed or slammed.

• Patio, French and bifold doors: lock and unlock them several times, checking that the handles, hooks, shootbolts and cylinders operate smoothly.

• UPVC doors and windows: test the handle, lock and hinges. A handle that feels loose or a door that needs force to lock may point to a faulty gearbox, worn mechanism or poor alignment.

• Windows, garages, sheds and gates: confirm that locks work, keys are available and the fitting itself has not become loose or damaged.

• Communal access: collect and record fobs, keys and entry codes where you control them. If a code has been widely shared, arrange for it to be changed through the managing agent.

Do not assume a lock is fine simply because a key turns. Check whether the door is secure when locked, whether the key can be removed correctly, and whether there is excessive movement in the cylinder or handle. Small faults tend to get worse quickly when a property is in daily use.

Decide what actually needs changing

The quickest option is often to replace the cylinder rather than the whole lock. On many modern doors, including UPVC and composite doors, the cylinder can be changed while retaining the existing multi-point mechanism. This is usually tidy, cost-effective and gives you a new set of keys.

That said, a cylinder change is not the answer to every problem. If a multi-point lock is stiff, the door has dropped on its hinges, or the handle and mechanism are worn, replacing only the cylinder may leave the real fault behind. The new tenant could then be locked out, or unable to secure the property, within weeks.

Older timber doors may need a different approach. Check the condition of the mortice lock, night latch, keeps, hinges and door frame. A good lock fitted to a weak, split frame will not offer the security you expect. After an attempted break-in, inspect the frame and strike area carefully before fitting replacement locks.

Think about the level of security as well as whether the lock works. A basic replacement may suit a low-risk internal door, but an external door may benefit from a quality anti-snap cylinder, appropriate security hardware and proper fitting. The right choice depends on the door, the property and the existing arrangement, not on a one-size-fits-all upgrade.

Check fire safety before changing anything

Security and fire safety must work together. This matters particularly in flats, shared houses and HMOs, where the front door may be a fire door and escape routes are critical.

A lock on an escape door should allow occupants to leave without needing to search for a key. Do not fit a lock that could trap someone inside during an emergency. On communal doors, do not alter the locking arrangement without checking the building rules and the requirements of the managing agent or freeholder.

If a fire door is not closing fully, has a damaged closer, or has gaps and damage around the frame, do not treat it as a simple lock job. Get the door and its hardware assessed properly. The lock, latch, hinges and closer all need to work as a set.

Give the new tenant a clear key handover

Once the work is finished, issue keys only when you are ready for the new tenancy to begin. Count each key, fob and remote, then write down what has been supplied. A simple handover record is useful for everyone.

Explain which key operates which door if the property has several entrances, a shared rear access or a separate bin store. If a key is stiff, do not tell the tenant to force it. Stiff operation is a reason to investigate alignment or mechanism problems, not a normal feature of the property.

For managed properties, keep a secure record of the lock type and any spare keys held. Avoid labelling keys with the full address. If a set is lost, an address label turns an inconvenience into a potential security risk.

It is also worth deciding how you will handle future key requests. Tenants may need an extra copy for a partner or carer. Agreeing the process upfront helps you retain an accurate record of access without making day-to-day life difficult for the tenant.

Do not ignore signs of a failing door

Many emergency lockouts begin with warnings that were easy to miss during a rushed changeover. A key that catches, a handle that will not spring back, a UPVC door that needs lifting, or a bifold door that will not line up properly all deserve attention before the tenant moves in.

Forcing a key can snap it in the cylinder. Forcing a handle can damage the gearbox or lock case. In both cases, a planned repair between tenancies is normally far less disruptive than an emergency visit when the property cannot be secured.

If the lock has been damaged during a burglary or there are marks around the cylinder, letterbox, frame or hinges, replace and reinforce rather than merely covering the damage. The aim is not only to make the door close again, but to leave the next tenant with a properly secure home.

Keep the paperwork with the property file

Save the invoice, key record and details of any lock upgrade. Note the date of change and what was fitted. This makes future maintenance easier, particularly where more than one person manages the property.

It also helps when tenants report a fault. You can establish whether they are dealing with a recent lock, an older door mechanism or a matching issue caused by the door moving over time. Clear records support faster decisions and avoid replacing parts that are not actually at fault.

A proper changeover does not have to be complicated. Test every entrance, change locks where key control is uncertain, repair faults before they become lockouts, and hand over a property that closes and locks as it should. If a door, UPVC mechanism or bifold lock is already playing up, deal with it while the property is empty - it is one less problem for you and your new tenant to face later.