Building services in Belfast
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Belfast
| 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 |
| Hip-to-gable loft conversions | £47,500–£67,000 for a hip-to-gable with rear dormer |
| Garage conversions | £15,500–£26,000 for a single integral garage |
| House renovations | £750–£1,550 per m² for a medium to full renovation |
Prices across Northern Ireland are typically 14% below the UK average for this kind of work, which is reflected in the range for Belfast.
Planning permission in Belfast
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 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.
About building in Belfast
Across Northern Ireland, bungalows and chalet bungalows are common, so loft conversions and rear extensions are popular projects.
From BT1 outwards, we take on projects throughout Belfast and the surrounding parts of County Antrim. Belfast has a population of around 350,000.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions from homeowners in Belfast
How much does a loft conversion cost in Belfast?
A rear dormer loft conversion in Belfast typically costs £41,500–£58,500 for a typical rear dormer with en-suite, including VAT.
Do I need planning permission for an extension in Belfast?
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.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
How much does an extension cost in Belfast?
A single-storey extension in Belfast typically costs £1,700–£2,500 per m² of floor area, and a double-storey extension £1,400–£2,150 per m² of floor area (both floors), including VAT.
Do you work in Belfast?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Belfast, including postcodes BT1, BT2, BT3 and BT4.