You get the keys, step through the door, and suddenly the place is yours – at least on paper. What you do not know is how many other keys are still out there. That is exactly why so many people decide to change locks after moving house, and in most cases it is a sensible step rather than an overreaction.
The previous owner may have handed over every key they had. They may also have forgotten about the spare given to a relative, a cleaner, a neighbour, a tradesperson or a former tenant years ago. If you have moved into a rental property, the same concern applies. You are not being difficult by asking questions about lock security. You are protecting your home, your family and your belongings from the first day.
Should you change locks after moving house?
In simple terms, yes – if you cannot be fully certain who has access, changing the locks is usually the safest option. A lock is only as secure as the control over the keys. Even a high-quality cylinder loses part of its value if multiple unknown copies are in circulation.
That said, it does depend on the property and the circumstances. If you have moved into a new-build with documented key control and no prior occupants, the urgency may be lower. If you have bought an older home, moved into an ex-rental, or taken over a property with a lot of recent work done, the case for replacing or rekeying locks becomes much stronger.
There is also the issue of insurance. Some policies expect visible signs of forced entry before a claim is considered. If someone enters using a legitimate key that was never recovered, the situation can become more complicated. Changing locks early removes that risk and gives you a clear starting point for your own security.
Why change locks after moving house if the old locks still work?
Because working and secure are not always the same thing. A lock can turn perfectly well and still be outdated, poorly fitted, damaged internally or below modern standards.
Many people move in and focus on obvious jobs first – unpacking, broadband, utilities, decorating. Locks tend to sit low on the list because they appear fine. The problem is that the weaknesses are not always visible. Older euro cylinders can be vulnerable to snapping. Some timber door locks may have worn components. A uPVC door may look secure from the outside while the mechanism is already starting to fail.
Replacing locks after a move is not just about unknown key holders. It is also a chance to check whether your front door, back door, patio door, garage access and windows are properly protected. For landlords and business owners, it is part of taking control of the property from the outset.
The main situations where changing locks makes sense
If you have bought a property, changing the external door locks is usually the cleanest way to start. It gives you certainty and lets you choose a lock that suits your needs, whether that is better anti-snap protection, a thumb-turn option for convenience, or a matched set of cylinders using fewer keys.
If you are a tenant, it depends on your tenancy agreement and the landlord’s approval, but security concerns are still valid. Some landlords will arrange a lock change between tenancies. Some will not. If nothing has been changed and you are unsure who had access before you, it is worth raising the issue straight away.
If you are a landlord, changing locks between tenants can prevent disputes and reduce risk. It also shows a proper duty of care. This matters even more if keys were not returned at the end of the tenancy or if there were contractors regularly coming and going.
If you have moved into commercial premises, the stakes can be higher. Former staff, delivery contacts, cleaners or maintenance teams may still have keys or access codes. In that setting, reviewing all entry points is not optional. It is basic site security.
What locks should be changed first?
Start with the doors that provide direct access into the property. The front door is the obvious first priority, followed by the back door and any side entrance. After that, look at patio doors, garage doors that connect into the house, and ground-floor windows with locks that are worn, damaged or missing keys.
Not every lock needs replacing on day one. If your budget is tight, prioritise the most exposed points of entry first. A good locksmith will normally advise you where the risk is highest and where an upgrade will make the most difference.
For many homes in Birmingham and the wider West Midlands, the front and rear door cylinders are the most important place to start. On uPVC and composite doors, upgrading to a tested anti-snap cylinder can be a practical improvement. On wooden doors, the right mortice lock and proper alignment matter just as much as the lock brand itself.
Repair, rekey or replace?
People often assume a full replacement is the only answer, but that is not always true. Sometimes the lock body can stay in place and only the cylinder needs changing. In other cases, the issue is poor fitting, a faulty mechanism or a door that has dropped out of alignment.
Rekeying can be a good option in some lock types, especially when the hardware itself is in good condition and the main concern is old keys still working. Full replacement makes more sense when the lock is damaged, outdated or not providing the security level you need.
This is where honest advice matters. You do not want to pay for unnecessary work, but you also do not want to leave an avoidable weakness in place. A proper inspection should look at the lock, the door, the frame and how everything closes together.
How much does it cost to change locks after moving house?
The cost depends on the number of locks, the type of door, the level of security you want and whether any mechanism repairs are needed. A simple cylinder change is usually more affordable than replacing a complete multipoint locking system, but the cheapest option is not always the best value if it leaves you upgrading again later.
It is also worth thinking about the wider cost of doing nothing. If you move in and later discover missing keys, a failed lock or a security issue after an incident, the disruption is often worse than dealing with it early. Most customers prefer a clear price, straightforward advice and work that is guaranteed, rather than guessing what standard they currently have.
Signs the existing locks need attention now
Some warning signs should not be ignored. If the key sticks, the lock feels stiff, the handle is loose, the door catches badly, or the cylinder sits exposed from the face of the door, it is worth getting it checked. These problems are not just irritating. They can point to wear, poor installation or a lock that may fail at the wrong moment.
If the property has recently been burgled, or there are signs of attempted forced entry, lock changes should be immediate. The same applies if you suspect keys have gone missing during the sale, letting or renovation process.
Choosing the right locksmith for the job
Moving house comes with enough stress already. You want a locksmith who explains the options clearly, turns up when promised and fits locks properly without pushing work you do not need.
A local locksmith is often the better choice because quick attendance matters if you are moving in, waiting for contractors or trying to secure the property before your first night there. If you are based in Birmingham or nearby, using an established local service such as Locksmith4City can also make it easier to get practical advice on common door types, security upgrades and urgent attendance when something is not right.
Look for straightforward pricing, non-destructive methods where possible, and a guarantee on the work. Those details matter more than flashy claims.
A sensible first step after the boxes come in
Changing locks is not the most exciting part of moving, but it is one of the few jobs that gives immediate peace of mind. You cannot control who had access before you arrived. You can control who has access from today.
If the locks are old, the keys are unaccounted for, or the door security is not where it should be, dealing with it early is the practical choice. Once that is sorted, the house starts to feel like your home in the way that matters most – secure, private and under your control.