You’ve just moved into a rented house or apartment. The letting agent hands you two keys — and you have no idea how many other copies exist, or who has them. The previous tenants? A builder? An old flatmate of the previous tenants? It’s one of the most common calls we take at Dyno-Locks, and it always comes with the same question: am I actually allowed to change the locks in a rented home in Ireland?

The short answer: usually yes, with your landlord’s consent — and in most cases that consent shouldn’t be hard to get if you go about it properly. The longer answer involves your lease, the Residential Tenancies Act, and a few rules about landlord access that every renter in Ireland should know. Here’s the full picture.

What Irish law actually says about tenants and locks

There is no line in Irish tenancy law that says “a tenant may not change the locks.” What the law does say — under the Residential Tenancies Act 2004, the legislation the RTB (Residential Tenancies Board) enforces — is two things that pull in opposite directions:

• Tenants have exclusive occupation: you have the right to peaceful and exclusive occupation of your home. It’s your home for the duration of the tenancy, not the landlord’s to wander into.
• Tenants can’t alter the property without consent: tenants must not alter or improve the property without the landlord’s consent — and a lock change is generally treated as an alteration.

So the legal position sits in the middle: the property is exclusively yours to occupy, but the doors and their hardware belong to the landlord. In practice, that means the answer to “can I change the locks?” lives in your lease — and in how you ask.

Check your lease first — this is where the real answer is

Most Irish tenancy agreements contain a clause covering locks and keys. The typical wording says the tenant must not change, alter or add locks without the landlord’s prior written consent, and that where consent is given, the tenant must provide the landlord with a key for the new lock and return all keys when the tenancy ends.

If your lease has a clause like that, follow it. Changing a lock without consent when your lease forbids it is a breach of your tenancy obligations — and it’s an entirely avoidable one, because a reasonable landlord has little reason to refuse a request that improves the security of their own property. If your lease is silent on locks, you’re in greyer territory: consent is still the safe route, because of the no-alterations rule above.

How to change the locks in a rented home the right way

Whether you’re worried about stray keys from previous tenants, you’ve had a break-in, or an ex-partner or former flatmate still has a key, this is the process we recommend to every renter who calls us:

1. Ask the landlord in writing. Text or email is fine — you want a written record, not just a phone call. Explain why: “I’d like to replace the front door cylinder as I’ve no way of knowing who holds copies of the current keys.”
2. Agree what’s being changed. On most modern doors, a lock change is actually a cylinder swap — the euro cylinder in a uPVC or composite door can be changed in minutes without touching the door or the multipoint mechanism. That’s not structural, and it’s easily reversed.
3. Offer the landlord a key. If your lease requires it (most do), hand over a copy of the new key. Remember: holding a key does not give your landlord the right to let themselves in — more on that below.
4. Keep the old cylinder. Put the original cylinder in a drawer. When you move out, you can refit it and take your new cylinder with you — leaving the property exactly as you found it and your deposit untouched.
5. Use a licensed locksmith. A PSA-licensed locksmith will fit the correct size cylinder, advise on anti-snap upgrades, and leave no damage. In Ireland, locksmiths are required to hold a PSA (Private Security Authority) licence — always check for one.

Your landlord cannot enter without your agreement — key or no key

This is the part of Irish tenancy law that surprises the most people, on both sides. Because you have the right to exclusive occupation, your landlord can only enter the property by arrangement with you. That covers inspections, viewings, repairs — everything. The one exception is a genuine emergency: a fire, a burst pipe, gas — situations where waiting for permission would cause serious harm or damage.

A landlord who lets themselves in without agreement is breaching your tenancy rights, and repeated unannounced entry can be raised as a dispute with the RTB. If that’s happening to you, keep a written record of dates and communications — and note that a lock change (with consent, as above) is often the practical fix while the dispute process runs.

What about the landlord holding a key?

There’s no law requiring your landlord to hold a key to your home. Many do, and many leases require it after a lock change — that’s a contractual matter between you. But the key changes nothing about access rights: entry still requires your agreement, emergency aside. A key in the landlord’s drawer is for emergencies and agreed visits, not casual access.

When the locks are changed against you: illegal eviction

The reverse situation is far more serious. If a landlord changes the locks to keep a tenant out — over rent arrears, a dispute, or an attempt to force the tenant to leave without proper notice — that is an illegal eviction. It doesn’t matter what the tenant is alleged to have done; there is a legal process for ending a tenancy, and changing the locks isn’t part of it.

A tenant locked out this way can bring an urgent dispute to the RTB, which can direct the landlord to restore access and award damages against them. If you’ve been illegally locked out, contact the RTB and keep evidence of everything: photos, texts, witness details. And for clarity on our side of it: a reputable locksmith will not open or change the locks on an occupied rented dwelling for a landlord trying to exclude a tenant — expect to be asked for proof of who you are and your right to the property.

Who pays for a lock change in a rental?

A question with a genuinely fair answer on both sides:

• If the lock has simply failed or worn out — normal wear and tear is the landlord’s responsibility. Landlords must keep the structure and fittings of the property in repair, and door locks are part of that.
• If you lost the keys or damaged the lock — that cost generally falls to you as the tenant. Most leases say so explicitly.
• If it’s a security preference — like clearing out unknown key-holders after moving in — agree it before anyone is called out. In our experience, a landlord who is told “I’ll pay for the cylinder swap myself and give you a key” almost never says no.

The bottom line for Irish renters

Frequently Asked Questions

can a tenant change the locks in Ireland?

Irish tenancy law doesn’t expressly ban it, but most leases treat a lock change as an alteration requiring the landlord’s written consent. Check your lease, get consent in writing, keep the original cylinder and refit it at the end of the tenancy.

Can my landlord enter without permission?

No. You have the right to peaceful and exclusive occupation. A landlord may only enter by arrangement with you, except in a genuine emergency such as a fire or burst pipe.

Does my landlord have to hold a key?

No law requires it, but many leases require you to provide one after a lock change. Holding a key does not give the landlord any right of entry without your agreement.

Can a landlord change the locks on a tenant?

No — locking a tenant out is an illegal eviction. The tenant can bring an urgent dispute to the RTB, which can order access restored and award damages.

Who pays for a lock change in a rented property?

Wear and tear is the landlord’s repair responsibility; lost keys or tenant damage is usually the tenant’s cost; a security-preference change is typically paid by whoever requests it. Agree it in writing first.

Disclaimer: this article is general information, not legal advice. For advice on a specific tenancy dispute, contact the RTB, Threshold, or a solicitor.