Building projects we take on in County Londonderry
House extensions
- Single-storey extensions in County Londonderry
- Double-storey extensions in County Londonderry
- Side extensions in County Londonderry
- Side return extensions in County Londonderry
- Wraparound extensions in County Londonderry
- Kitchen extensions in County Londonderry
- Orangeries in County Londonderry
- Glazed and contemporary extensions in County Londonderry
- Porches in County Londonderry
Loft conversions
- Dormer loft conversions in County Londonderry
- Hip-to-gable loft conversions in County Londonderry
- Mansard loft conversions in County Londonderry
- Rooflight loft conversions in County Londonderry
- Bungalow loft conversions in County Londonderry
Garage, basement and barn conversions
- Garage conversions in County Londonderry
- Basement conversions in County Londonderry
- Barn conversions in County Londonderry
- Garden annexes in County Londonderry
New build homes
Renovations and structural work
- House renovations in County Londonderry
- Structural alterations and knock-throughs in County Londonderry
Design and approvals
Guide prices in County Londonderry
| 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) |
That range is adjusted for Northern Ireland, where domestic building work typically costs around 14% below the national average.
Planning and building control in County Londonderry
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 Londonderry
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 Londonderry
Do you cover all of County Londonderry?
Yes. We take on projects across County Londonderry, including Derry, Coleraine, Limavady and Magherafelt.
How much does an extension cost in County Londonderry?
A single-storey extension in County Londonderry typically costs £1,700–£2,500 per m² of floor area, including VAT.
Do I need planning permission in County Londonderry?
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 Londonderry?
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.