County Londonderry
Wraparound extensions in County Londonderry
An L-shaped extension that fills the side return and runs across the back. Across County Londonderry we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Derry~Londonderry, Coleraine and Limavady.
In Derry~Londonderry we usually draw the wraparound and a simpler rear-only option side by side, so the planning risk and cost difference are clear. County Londonderry has terraces near the centre, semis on the edges and many detached houses and bungalows in the surrounding countryside, where plots are often generous.
How much does a wraparound extension cost in County Londonderry?
In County Londonderry, our guide for a wraparound extension is £1,910–£3,130 per square metre including VAT for a standard specification. Northern Ireland prices are the lowest in our range.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £42,000–£69,000 |
| L-shaped, about 30 m² of new floor | £57,500–£94,000 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission in County Londonderry?
In Northern Ireland side extensions that face a road, or go beyond permitted development limits, need planning permission from the council, and most wraparounds go through a planning application.
Northern Ireland has no Party Wall Act. Shared-wall work relies on agreement with your neighbour and the general law, so we put access and protection arrangements in writing before starting.
Conservation areas, Areas of Outstanding Natural Beauty and listed buildings restrict permitted development in Northern Ireland.
Where in County Londonderry do we work?
FAQ
Questions people ask
Does a wraparound need planning permission?
Often yes, because the side and rear parts are judged together. Some fit within permitted development; we check before drawing.
How long does a wraparound take?
Usually 14 to 20 weeks on site, longer than a plain rear extension because of the steelwork.
Can the corner be all glass?
Yes, with a steel or aluminium post or a structural glass corner. It needs careful thermal detailing to meet Building Regulations.
Do you cover all of County Londonderry?
We cover 5 towns and districts in County Londonderry, including Derry~Londonderry, Coleraine and Limavady.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.