County Londonderry
Rear extensions in Portstewart
From the first measured visit to building control sign-off, we handle rear extensions in Portstewart under one contract.
Portstewart is in County Londonderry, with postcode districts including BT55. The nearest places we also cover are Coleraine (3.8 miles) and Limavady (13.0 miles).
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
Rear extensions we build in Portstewart
- Single-storey rear extensions
- Two-storey rear extensions
- Kitchen-diner rear extensions
- Side return extensions
- Wraparound extensions
- Glazed and glass-box rear extensions
- Rear extensions for terraced houses
- Rear extensions for semi-detached houses
- Rear extensions for bungalows
- Rear extension plans and planning applications
Also available across County Londonderry:
- Rear extensions for detached houses
- Flat-roof rear extensions
- Pitched and lean-to roof rear extensions
- Knocking through to a rear extension
- Roof lanterns and rooflights for rear extensions
- Permitted development rear extensions
- Building Regulations for rear extensions
Rear extension prices in Portstewart
Northern Ireland prices are the lowest in our range.
| Example | Guide inc VAT |
|---|---|
| Single-storey, 3 m × 4 m (12 m²) | £20,000–£32,500 |
| Single-storey, 4 m × 6 m (24 m²) | £39,500–£64,500 |
| Two-storey, 3 m × 5 m footprint (30 m²) | £47,000–£70,500 |
| Side return, about 14 m² | £28,000–£46,500 |
| Wraparound, about 25 m² | £48,000–£78,500 |
What are homes in Portstewart like to extend?
Portstewart has terraces near the centre, semis on the edges and many detached houses and bungalows in the surrounding countryside, where plots are often generous.
Planning rules for Portstewart
In Northern Ireland the Planning (General Permitted Development) Order (Northern Ireland) 2015 allows a single-storey rear extension of up to 3 metres on an attached house or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary. Building control approval from the council is still required.
Northern Ireland has no larger-extension prior approval route; anything beyond permitted development needs a planning application.
In Northern Ireland building control is run by the councils. A rear extension needs approval (full plans or building notice) and is built to the Northern Ireland Technical Booklets.
Nearby towns
FAQ
Questions people ask
How much is a rear extension in Portstewart?
A 3 m × 4 m single-storey rear extension is about £20,000–£32,500 including VAT at our Northern Ireland guide rates; the written price follows a survey.
Do I need planning permission in Portstewart?
Often not for a single-storey rear extension of up to 3 metres (4 metres detached) under Northern Ireland's permitted development rules, outside conservation areas.
Is the site visit in Portstewart free?
Yes, with no obligation.
Do I need a party wall agreement?
Northern Ireland has no Party Wall Act; we agree any shared-wall work with your neighbour in writing.