Foundations · power · heat
Foundations, power and heat
Ground screws are published from €90 to €110 a m², and the power cable from €15 a metre (Loghouse.ie). Electrical work in your home must, by law, be done by a Registered Electrical Contractor, who gives you a completion certificate (CRU).
- €15,950for an insulated, fitted 4 m × 3 m room, incl. VAT and installation, from a Kilcoole firm's own price list (East Coast Carpentry)
- 30 m²the planning-exempt total for garden structures since 27 July 2026, up from 25 m² (S.I. 338 of 2026)
- 59%of people at work in Greystones-Delgany said they work from home (CSO Census 2022)
- 33 pricesfrom 5 sources, read 3 November 2026: the cost guide
FreeNo obligationOne company rings you, not fiveNothing agreed until you accept a written price
The base
Three kinds of base
- Ground screws: steel screws wound into the ground, a frame on top. Quick, little digging, good on a slope.
- A concrete slab: dug, shuttered and poured. Takes the most load, so it suits a gym. Needs days to cure.
- Pads and a timber frame: concrete pads at the corners and along the sides.
| Extra | Published price | VAT | Source |
|---|---|---|---|
| Ground screw foundation, a m² (from) | €90 to €110 | VAT not stated | Loghouse.ie |
Inovo lists a concrete or ground-screw base in its price. Ask any firm which base is included.
Power
Getting power to the room
An armoured cable runs underground from the house's fuse board to a small board in the room. Loghouse.ie lists the connection from €15 a metre, and East Coast Carpentry quotes the main cable separately from the room, so the distance from the house matters. By law, a Registered Electrical Contractor does the work and gives you a completion certificate (CRU).
Heat and water
Heating, water and a toilet
| Extra | Published price | VAT | Source |
|---|---|---|---|
| Heating | €1,000 to €5,000 | VAT not stated | Loghouse.ie |
| Flooring and heating package (from) | €580 to €1,500 | VAT not stated | Loghouse.ie |
| Plumbing | €1,000 to €2,500 | VAT not stated | Loghouse.ie |
| External and internal painting | €1,000 to €1,800 | VAT not stated | Loghouse.ie |
A panel heater is the usual heat. Water and a toilet mean a pipe and a drain connection, which add cost and, with a shower, make the room look more like somewhere to live. Under Class 3 it can't be lived in.
See it first
A garden room in your own garden
Take a photo from the back door, pick the cladding and the front, and see a room at the end of your garden before anyone quotes. Free, in under a minute.
- Upload a photo, or answer 4 questions.
- We pass it to one company that covers your part of Wicklow.
- They ring you with a written price.
Preview of your photo, not a guarantee. Your photo goes to Google's Gemini service to make the picture and isn't kept.
Before you choose a spot
- Measure the garden. At least 25 m² of it has to stay open for the room to be exempt.
- Check how far the spot is from the house: the power cable runs that distance, and it's priced separately.
- Look at side access. Panels and a base have to get through.
- On a sloping hillside garden, ask about the base before anything else.
Free quote
Get a price in 4 taps
Tap what you need and leave your number. It goes to one garden room company that covers your part of Wicklow, and they ring you back to arrange a look at the garden and a written price.
FAQ
Questions people ask
Does a garden room need foundations?
Yes, a level, stable base: ground screws, a slab or pads. A cabin on soft ground moves, and doors stop closing.
How much is it to run electricity to a garden room?
Loghouse.ie lists the connection from €15 a metre; the contractor prices the board, sockets and lights on top.
Can I put a toilet in a garden room?
Loghouse.ie lists plumbing at €1,000 to €2,500. Drainage depends on where the house's drains run.
Keep reading
Related guides
- Garden room cost in WicklowWicklow and Irish firms' published prices side by side, checked November 2026.
- Garden gymsFloor, height, ventilation and what a gym room costs.
- Insulated garden roomsWhat 'insulated' should mean, and what a fitted room includes.
- Planning permission in WicklowThe 30 m² rule since July 2026, and Wicklow's €80 section 5 check.
Where these numbers come from (3 public sources, checked 3 November 2026)
Sources (3)
Prices and facts on this page were checked against these published pages. We are not connected to these businesses.
- Loghouse.ie: loghouse.ie
- East Coast Carpentry: eastcoastcarpentry.ie
- Inovo: inovohomeimprovements.ie