Kitchen and house extensions in Kildare
A single-storey kitchen extension in Kildare costs €1,800 to €2,500 per m² to build, including VAT. A 25 m² extension with a new kitchen and fees comes to €55,000 to €98,000 all in, standard to mid-range. Up to 45 m² at the back needs no planning permission if it meets the conditions.
Builders covering Naas, Newbridge, Maynooth, Celbridge, Leixlip, Kildare town. What it costs here, the housing, and the council.
Free, no obligation. One local builder prices it, not five.
- €1,800–€2,500per m² in Kildare, incl. VAT
- €55,000–€98,00025 m² with a kitchen, all in
- 70 m²average extension given permission in Kildare, Meath, Wicklow and Louth, 2025
- 82,543households in Kildare (Census 2022)
Extending a house in Kildare
Kildare is semi-detached country: 38% of households live in a semi-detached house, the highest share of these seven counties, and 38% detached (Census 2022).
It's young housing: 28% of homes were built between 2001 and 2010 and 13% since 2011. Newer estates in Naas, Maynooth, Celbridge and Newbridge sometimes carry a planning condition removing exempted development rights, so check before you rely on the 45 m².
In 2025, councils in Kildare, Meath, Wicklow and Louth granted 959 permissions to extend homes, averaging 70 m² (CSO).
As a commuter county, Kildare is priced like Dublin: €1,800 to €2,500 per m² for a single-storey extension, including VAT.
- 38%detached
- 38%semi-detached
- 14%terraced
- 22%built 1946 to 1980
What an extension costs in Kildare
| Type | Build cost in Kildare |
|---|---|
| Single-storey rear | €1,800 to €2,500 per m² |
| Side return | €2,000 to €2,700 per m² |
| Wraparound | €2,500 to €3,500 per m² |
| Two-storey | €2,200 to €2,800 per m² |
| High spec or glazed | €3,000 to €4,000 per m² |
- 20 m² single-storey rear, mid-range, with a kitchen: €58,000 to €85,000
- 30 m² single-storey rear, mid-range, with a kitchen: €80,000 to €110,000
- 40 m² wraparound, mid-range, with a kitchen: €135,000 to €175,000
All in means build, design and engineer's fees, and a mid-range kitchen, including VAT. Keep 12% to 15% aside.
Plan your extension and see the cost
Nine quick taps. You see your plan build up as you go: the price range, what moves it, the planning position and the build time. Your number is only asked for at the end, if you want a real price.
A 25 m² single-storey rear extension in Kildare, mid-range, with wide glass doors and a new kitchen: €69,000 to €98,000 all in, including VAT and fees.
How this is worked out
We start from what single-storey extensions cost to build per square metre in each part of Ireland, including VAT at 13.5%, and the rates for side, wraparound, two-storey and heavily glazed extensions. Standard finishes take the lower half of the range, mid-range the upper half, and high spec or a wall of glass the glazed rate. Then we add professional fees (design, engineer, BER) and, if you want one, a new kitchen at your level of finish. Totals are rounded to the nearest €1,000. It's an estimate to plan with, never a quote: the builder prices your house after seeing it.
Planning in Kildare
The rules are national: up to 45 m² at the back with no planning permission, if it meets the conditions, since 27 July 2026. Planning applications in Kildare go to Kildare County Council. The fee for a house extension is €34, and a section 5 declaration on whether your extension is exempt is €80.
The exemption doesn't apply if the house's own planning permission has a condition that takes exempted development away (common on newer estates), if the house is a protected structure and the work would affect its character, or if the extension would obstruct a public right of way or a road. The full rules.
Every kind of kitchen extension
The costs, the rules and what to ask for, a page each.
Single-storey rearAcross the back of the house, usually with roof windows and wide glass to the garden.
Side returnThe narrow passage beside a terrace's back return, filled in and lit from above.
WraparoundAn L round the back and down the side, for one big kitchen, dining and living room.
Two-storeyA bigger kitchen below and a bedroom above, on one set of foundations.
Roof windows and lanternsFlat with roof windows, pitched, or a glazed lantern over the middle of the room.
Bifold or sliding doorsThe back wall opens to the garden. Which opens better, which seals better.Kitchen extensions by county
Each county page has its own housing figures, council and costs.
Kildare questions
How much does a kitchen extension cost in Kildare?
A single-storey kitchen extension in Kildare costs €1,800 to €2,500 per m² to build, including VAT. A 25 m² extension with a new kitchen and fees comes to €55,000 to €98,000 all in, standard to mid-range. Up to 45 m² at the back needs no planning permission if it meets the conditions.
Do I need planning permission for an extension in Kildare?
No planning permission is needed for a rear extension of up to 45 m², counting any earlier extensions built since 1964, if it meets the conditions: no higher than the house, at least 25 m² of private open space left, ground-floor windows at least 1 m from the boundary they face, and upstairs no more than 12 m² on a semi or terrace (20 m² detached). The limit rose from 40 m² on 27 July 2026. Applications go to Kildare County Council.
Do you cover all of Kildare?
Yes. Your request goes to one vetted builder who covers your county, including Naas, Newbridge, Maynooth, Celbridge, Leixlip, Kildare town.
How big are extensions in Kildare?
Those that needed planning permission in Kildare, Meath, Wicklow and Louth averaged 70 m² in 2025 (CSO). Exempt extensions are up to 45 m².
Who will ring me?
One vetted builder who covers Kildare. Not a list. Nothing is agreed until you accept a written price.
Get a free quote for your extension
Plan it in under a minute, see the cost, and one vetted builder who covers your county rings you with a proper price.