Landlords and Tenants: Changing Locks in Singapore

Rented flats and rooms are a big part of Singapore's housing, and they raise practical questions every locksmith hears: Can a tenant change the locks? Should a landlord keep a key? Who pays for a lockout? This guide sets out how it usually works and what Uncle Thomas looks for before doing a job in a rented home.

This is general information, not legal advice. Your tenancy agreement is the main document that sets out your rights and responsibilities — read it first, and get legal advice if you're in a dispute.

Start with the tenancy agreement

Most tenancy agreements in Singapore cover locks and keys somewhere — often in clauses about alterations, fixtures, access and the return of keys at the end of the tenancy. Look for:

• whether the tenant may change or add locks, and whether the landlord's written consent is needed;
• how many keys were handed over (this is often listed in the inventory);
• whether the landlord may enter the property, and how much notice is needed;
• who pays for lost keys, lockouts and lock replacements;
• what must be returned at the end of the tenancy.

If the agreement says nothing, the safest approach is to agree in writing — a simple WhatsApp message exchange is better than nothing.

For tenants

Can I change the locks?

In most cases, a tenant should get the landlord's written agreement before changing the main door or gate lock, because the locks are part of the landlord's property. Many landlords are happy to agree — especially if you've lost keys, or the old lock is worn — as long as they receive a copy of the new key or the new lock is handed back at the end of the tenancy.

I've lost my keys. What should I do?

Tell your landlord or agent as soon as possible, especially if anything with the address was lost too. Changing the cylinder is the only way to be sure the lost keys can't be used. Check your agreement to see who pays — commonly it's the tenant if the keys were lost through the tenant's fault.

I'm locked out. Can a locksmith help me?

Yes, if you can show you live there. A tenancy agreement with your name and the address, or a letter or bill addressed to you there, is usually enough. If those documents are inside, tell the locksmith; we can usually check them with you once the door is open. If you rent a room, a room door lockout works the same way.

Can I add a digital lock?

Adding a digital lock is an alteration to the door, so get the landlord's agreement first. Some landlords welcome it, especially if you agree to leave it behind at the end of the tenancy. Read our guide to digital vs traditional locks.

For landlords

Change the locks between tenants

Previous tenants, agents, cleaners and contractors may all have had keys. Replacing the main door cylinder between tenancies is a small cost that protects both you and your new tenant. Many landlords also change the letterbox lock.

Should I keep a key?

Many landlords keep a spare key for emergencies, and many tenancy agreements allow the landlord to enter with notice. Make sure the agreement states this clearly, and never enter without following it. If the tenant changes the lock with your agreement, ask for a copy of the new key if the agreement allows it.

Digital locks for rentals

Digital and smart locks are popular with landlords because codes can be changed between tenants instead of cutting new keys. Some smart locks also let you issue time-limited codes for agents, cleaners or contractors. If you use a smart lock, keep the admin details safe and remove old codes when a tenancy ends.

Lockouts and authorisation

If your tenant calls a locksmith, we'll ask the tenant for proof of residence. If you call us to open a flat that's currently rented out, we'll need to be satisfied that you have the right to enter — for example, proof of ownership and confirmation that the tenancy allows it. We won't open a tenanted home simply because the owner asks.

At the end of the tenancy

• Tenants: return every key and card listed in the inventory, including letterbox keys.
• If you changed a lock with permission, return the new keys — or reinstall the original lock if that's what you agreed.
• Landlords: check that every key is returned, and change the cylinder before the next tenant moves in.

Disputes

Lock disputes between landlords and tenants — for example, a landlord changing the locks to keep a tenant out — are serious and can have legal consequences. A locksmith is not the right person to settle them. If you're in a dispute, seek legal advice or mediation; Singapore has community mediation services and the Small Claims Tribunals for some disputes. Uncle Thomas will not change locks to exclude someone who lives at the property.

What it costs

With Uncle Thomas, main door and gate lock replacement starts from S$100 including supply and installation; letterbox lock replacement from S$60; and digital lock installation from S$120 for labour. Lockouts start from S$80 (9am–6pm) and S$120 after hours. Every replacement and installation comes with our no-expiry warranty, and we provide receipts for your records. See the price list.

Quick checklist

1. Read the tenancy agreement's clauses on locks, keys and access.
2. Agree any lock change in writing.
3. Keep receipts for lock changes and lost-key replacements.
4. Change cylinders between tenants.
5. Return all keys at the end of the tenancy.

Letterboxes, room doors and gates

Don't forget the smaller locks. In shared flats, each room may have its own lock — tenants should get a key for their room, and landlords should change room locks between tenants just as they would the main door. The letterbox key is also easy to forget at handover, and letterboxes hold bank letters and personal documents, so change the letterbox lock between tenancies too. If the gate and main door are keyed alike, make sure both are changed together.