A tenant moves out, the keys are returned and the property looks ready for cleaning. But should landlords upgrade door locks before the next tenancy starts? In many cases, yes – although an upgrade does not always mean replacing every lock on every door. The sensible approach is to assess who may still have access, whether the existing locks work properly, and whether the door gives the level of security the property needs.
For a landlord, a lock problem can quickly become more than a minor maintenance job. A tenant locked out at night, a front door that will not secure, or a lock damaged after a break-in all need dealing with promptly. Sorting security between tenancies is usually calmer, cheaper and far less disruptive than responding to an emergency call-out once a new tenant has moved in.
Should landlords upgrade door locks at every change of tenant?
There is no one-size-fits-all answer. A lock that is modern, secure, operates smoothly and has never had keys distributed outside the tenancy may not need replacing. However, changing the cylinder or fitting a new lock between tenancies is often good practice, particularly where keys have been lost, copied, passed between occupiers or held by previous contractors.
Keys are easy to duplicate and hard to track. Even where a former tenant returns the expected set, a landlord cannot know for certain that no copies exist. Replacing a standard euro cylinder or rim cylinder is normally a straightforward job and can give the incoming tenant confidence that they are the only people with access, apart from the landlord or managing agent holding an agreed spare.
It is also the right time to deal with issues that were tolerated during the previous tenancy. A key that sticks, a loose handle, a nightlatch that occasionally fails to catch or a multi-point door lock that needs lifting hard to close should not be left for the next tenant to discover.
Start with the door, not just the keyhole
A better lock cannot compensate for a poorly aligned door or a weak frame. Before deciding on an upgrade, check how the door closes. Does the latch engage cleanly? Is the keep secure in the frame? Has the door dropped on its hinges? Can the handle be lifted and the multi-point mechanism operated without force?
This matters especially with uPVC and composite doors. When a multi-point lock becomes difficult to operate, the cause may be door alignment, worn hinges, a faulty gearbox or a failing cylinder. Replacing the cylinder alone may not resolve the underlying fault. Equally, replacing the full mechanism when a simple adjustment or targeted repair would do is an unnecessary expense.
A proper inspection identifies the fault before work starts. That is the difference between a fair repair and a costly guess.
Common rental-property issues
Older timber doors often have a nightlatch, sometimes with a separate mortise deadlock. Flats may have rim cylinders on communal-facing doors, while newer homes commonly use euro cylinders with multi-point locking systems. Each arrangement has different strengths and potential weak points.
A basic nightlatch may be convenient, but it is not always enough on its own for a main entrance door. A mortise deadlock can add useful security where suitable. On a door with a euro cylinder, landlords should consider whether the cylinder is of an appropriate security standard and whether it sits correctly in the handle. A cylinder that projects too far can be more vulnerable to attack.
The right recommendation depends on the door, its condition, the type of property and any insurance requirements. It should never be a blanket instruction to fit the most expensive option available.
When replacing locks makes the most sense
Changing locks is particularly sensible after a change of tenant where key control is uncertain. It is also worth doing after a relationship breakdown, an eviction, a lost key set, a burglary, or any situation where unauthorised access is a genuine concern.
Landlords should also act when the lock is visibly worn or unreliable. Warning signs include keys that need jiggling, a cylinder that turns loosely, handles that sag, bolts that do not throw fully, or a door that only locks if it is pushed or pulled into position. These faults tend to worsen, and they can leave a tenant unable to secure the property or unable to get in.
Where a lock has failed, speed matters. Tenants need a safe, working entrance door, not an instruction to keep trying the key. A local locksmith can diagnose whether the lock can be repaired, rekeyed or should be replaced, then explain the cost before carrying out the work.
Security upgrades that are worth considering
Not every tenancy change requires a major security overhaul. Often, the most useful improvement is a quality replacement cylinder with controlled keys, fitted correctly to an existing sound door. This can be a practical step for landlords who want better key control without replacing a complete lock case or door furniture.
For houses with rear or side access, do not overlook patio doors, garage-entry doors and gates. These are commonly used every day, and a faulty handle or worn lock can be missed because the front door still appears secure. Window locks should also be checked between tenancies, especially on accessible ground-floor windows.
For shared houses, security has to sit alongside safe escape. A lock arrangement must not prevent occupants from leaving quickly in an emergency. Fire doors, communal doors and doors in HMOs may have specific requirements, so avoid fitting thumbturns, double-keyed locks or additional bolts without considering the whole door and the property’s fire safety arrangements. A qualified locksmith can advise on the lock itself, while landlords should ensure wider fire safety obligations are properly addressed.
Balancing security with tenant access
Landlords understandably want control over their property, but tenants are entitled to feel secure in their home. Clear arrangements make a difference. At the start of a tenancy, record how many keys have been issued, keep any agreed spare securely, and make sure the tenant knows who to contact if a key is lost or a lock becomes faulty.
It is also wise to set expectations about lock changes. A tenant may want to fit their own cylinder for peace of mind. Depending on the tenancy agreement, that may be possible provided the original lock is retained and reinstated at the end of the tenancy. The key point is communication. A surprise lock change, missing spare key or unclear access arrangement creates mistrust when a simple conversation could avoid it.
Landlords should not enter a tenant’s home simply because they hold a key. Access still needs to be arranged appropriately, except in a genuine emergency. Good security and respectful property management go together.
A practical plan between tenancies
The handover period is the best time to inspect locks properly. Test every external door from both sides, check that keys operate smoothly, and look for damage to handles, keeps, hinges and frames. Confirm all issued keys have been returned, including keys for sheds, garages, patios and communal entrances.
If the keys cannot be accounted for, change the relevant cylinder or lock. If the door is difficult to operate, have the fault diagnosed before the next tenant collects keys. Finally, keep a simple record of the work completed and the number of new keys supplied. It helps with future handovers and shows that security has been treated responsibly.
Trying to save a small amount by leaving a tired lock in place can lead to an avoidable out-of-hours problem later. On the other hand, replacing perfectly serviceable locks without a reason is not automatically good management. The best decision is based on condition, key control and the real risks at that particular property.
If you are unsure what a door needs, an experienced locksmith can assess it without pushing unnecessary work. Key to the Door provides straightforward advice on repairs, replacement locks and sensible security improvements, with the aim of leaving both landlord and tenant confident that the property is properly secured.
