Building services in Coleraine
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 Coleraine
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £1,700–£2,500 per m² of floor area |
| 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 |
| 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 |
Prices across Northern Ireland are typically 14% below the UK average for this kind of work, which is reflected in the range for Coleraine.
Planning permission in Coleraine
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 Coleraine
Across Northern Ireland, bungalows and chalet bungalows are common, so loft conversions and rear extensions are popular projects.
Our Coleraine coverage includes postcode districts BT51 and BT52, and we also work in nearby places such as Limavady, Ballymena and Magherafelt. Coleraine has a population of around 26,000.
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 fixed quote
Drawings, structural calculations and an itemised, fixed price for the agreed specification.
- 03
Approvals in place
We handle planning, building control and neighbour notices before work starts.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions from homeowners in Coleraine
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 Coleraine?
A single-storey extension in Coleraine 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 Coleraine?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Coleraine, including postcodes BT51 and BT52.
Do I need planning permission for an extension in Coleraine?
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.
How much does a loft conversion cost in Coleraine?
A rear dormer loft conversion in Coleraine typically costs £41,500–£58,500 for a typical rear dormer with en-suite, including VAT.