Building services in Carrickfergus
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 Carrickfergus
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £1,700–£2,500 per m² of floor area |
| Kitchen extensions | £1,950–£2,900 per m² including a mid-range kitchen |
| Dormer loft conversions | £41,500–£58,500 for a typical rear dormer with en-suite |
| House renovations | £750–£1,550 per m² for a medium to full renovation |
| Structural alterations and knock-throughs | £3,750–£8,250 for a typical knock-through with steel beam |
| Orangeries | £2,050–£2,900 per m² of floor area |
That range is adjusted for Northern Ireland, where domestic building work typically costs around 14% below the national average.
Planning permission in Carrickfergus
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 Carrickfergus
Northern Ireland has many detached and semi-detached homes on generous plots, which suits single-storey rear extensions and garage conversions.
Projects in Carrickfergus (BT38) are surveyed in person before we quote, so the price reflects your actual property. Carrickfergus has a population of around 29,000.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 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 Carrickfergus
How much does a loft conversion cost in Carrickfergus?
A rear dormer loft conversion in Carrickfergus 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 Carrickfergus?
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.
Do you work in Carrickfergus?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Carrickfergus, including postcodes BT38.
How much does an extension cost in Carrickfergus?
A single-storey extension in Carrickfergus 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.