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Garden Room Cost Calculator

A garden room in Dublin typically costs €20,000–€50,000, depending on size, insulation and finish. Rooms up to 25 square metres can often be built without planning permission.

  • Typical €20,000–€50,000
  • Sizes up to 25m² often exempt
  • Insulated, wired and finished
  • Free quotes
Estimate my cost Get free quotes Call 083 056 8710

Emergency Trade is independent and not part of SEAI or any council. Always confirm details with the official source before applying.

What's usually included

  • Base or foundations
  • Insulated walls, floor and roof
  • Doors and windows
  • Electrics and lighting
  • Internal finishes

Cost calculator

Get a guide range based on typical 2026 Dublin prices.

A guide only. Your quote will depend on your property, access and the specification you choose.

Planning

See planning permission for garden rooms. Exempt garden rooms can't be used as sleeping accommodation.

Frequently asked questions

How much does a garden room cost?

Typically €20,000–€50,000 in Dublin.

Do I need planning permission?

Often not, if it's no more than 25m² and meets the other conditions.

Can I use it as a home office?

Yes, generally, for your own use connected to the house.

Find vetted contractors for this work

By area:

  • Dublin 15: Blanchardstown, Castleknock, Mulhuddart, Ongar, Hansfield, Ashtown
  • West Dublin & Leixlip: Chapelizod, Palmerstown, Lucan, Leixlip, Adamstown, Clondalkin
  • Dublin North Coast: Raheny, Baldoyle, Donaghmede, Howth, Sutton, Portmarnock, Malahide
  • North Dublin City: Artane, Cabra, Clontarf, Coolock, Drumcondra, East Wall, Fairview, Glasnevin, Phibsborough, Stoneybatter
  • South Dublin City: Ballsbridge, Donnybrook, Sandymount, Ranelagh, Rathgar, Harold's Cross, Churchtown, Dundrum
  • Dún Laoghaire & South Coast: Blackrock, Booterstown, Monkstown, Dún Laoghaire, Dalkey, Killiney
  • Stillorgan, Sandyford & Foxrock: Mount Merrion, Stillorgan, Goatstown, Sandyford, Cherrywood, Cabinteely, Foxrock, Deansgrange
  • North County Dublin: Swords, Lusk, Rush, Skerries
  • South West Dublin: Tallaght, Citywest, Firhouse, Knocklyon, Ballyboden, Templeogue, Walkinstown, Kimmage, Rathfarnham, Terenure

Get free quotes from vetted contractors

Tell us what you're planning, where the property is and when you'd like to start. We'll match you with a vetted local contractor. For anything urgent, call 083 056 8710.

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For anything urgent, call 083 056 8710.