Building projects we take on in County Antrim
House extensions
- Single-storey extensions in County Antrim
- Double-storey extensions in County Antrim
- Side extensions in County Antrim
- Side return extensions in County Antrim
- Wraparound extensions in County Antrim
- Kitchen extensions in County Antrim
- Orangeries in County Antrim
- Glazed and contemporary extensions in County Antrim
- Porches in County Antrim
Loft conversions
- Dormer loft conversions in County Antrim
- Hip-to-gable loft conversions in County Antrim
- Mansard loft conversions in County Antrim
- Rooflight loft conversions in County Antrim
- Bungalow loft conversions in County Antrim
Garage, basement and barn conversions
- Garage conversions in County Antrim
- Basement conversions in County Antrim
- Barn conversions in County Antrim
- Garden annexes in County Antrim
New build homes
Renovations and structural work
Design and approvals
Guide prices in County Antrim
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £1,700–£2,500 per m² of floor area |
| Double-storey extensions | £1,400–£2,150 per m² of floor area (both floors) |
| Dormer loft conversions | £41,500–£58,500 for a typical rear dormer with en-suite |
| Garage conversions | £15,500–£26,000 for a single integral garage |
| House renovations | £750–£1,550 per m² for a medium to full renovation |
| New build homes | £1,700–£2,750 per m² of floor area (build cost) |
We start from a UK-wide guide and adjust it for Northern Ireland, where labour and materials are typically about 14% below average.
Planning and building control in County Antrim
In Northern Ireland the Planning (General Permitted Development) Order (Northern Ireland) 2015 allows single-storey rear extensions of up to 3 metres on attached houses and 4 metres on detached houses, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary. Houses with removed rights need planning permission, listed buildings need consent, and in conservation areas extensions must stay single-storey and must not come forward of the front or side walls.
In Northern Ireland a rear dormer can be permitted development if it does not face a road, sits no higher than the ridge and is set back at least 0.5 metres from the ridge, eaves, party wall and verges. Roof enlargements are not permitted development in conservation areas.
In Northern Ireland building control approval comes from the council, usually through a full plans application or a building notice, with inspections during the work and a completion certificate at the end.
Building in County Antrim
Northern Ireland has many detached and semi-detached homes on generous plots, which suits single-storey rear extensions and garage conversions.
Questions about building in County Antrim
Do you cover all of County Antrim?
Yes. We take on projects across County Antrim, including Belfast, Lisburn, Newtownabbey, Carrickfergus and Ballymena.
How much does an extension cost in County Antrim?
A single-storey extension in County Antrim typically costs £1,700–£2,500 per m² of floor area, including VAT.
Do I need planning permission in County Antrim?
In Northern Ireland the Planning (General Permitted Development) Order (Northern Ireland) 2015 allows single-storey rear extensions of up to 3 metres on attached houses and 4 metres on detached houses, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary. Houses with removed rights need planning permission, listed buildings need consent, and in conservation areas extensions must stay single-storey and must not come forward of the front or side walls.
Who approves building work in County Antrim?
In Northern Ireland building control approval comes from the council, usually through a full plans application or a building notice, with inspections during the work and a completion certificate at the end.