Portstewart, County Londonderry
Terraced house rear extension in Portstewart
Thinking about a terraced house rear extension in Portstewart? Rear and side return extensions for terraces, with access through the house and two neighbours. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Portstewart sits in County Londonderry, with postcode districts including BT55. In Portstewart we plan the delivery route through the house and the skip licence before anything else.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a terraced house rear extension cost in Portstewart?
A terraced house rear extension in Portstewart is priced at £1,780–£2,870 per square metre including VAT as a guide, before kitchen fit-out and fees. Northern Ireland prices are the lowest in our range.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £24,000–£39,000 |
| 3 m wide × 6 m deep (18 m²) | £32,000–£51,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a terraced house rear extension in Portstewart?
Here is how the rules in Northern Ireland apply to a terraced house rear extension in Portstewart.
Northern Ireland's permitted development rules allow a single-storey rear extension of 3 metres on terraced and semi-detached houses and 4 metres on detached houses, with a 4 metre height limit. Listed buildings, conservation areas and houses with removed rights need planning permission from the council.
There is no Party Wall Act in Northern Ireland; we agree any work affecting a shared wall or boundary directly with the neighbour, in writing.
Conservation areas, Areas of Outstanding Natural Beauty and listed buildings restrict permitted development in Northern Ireland. At the first visit we measure what is there now and tell you which route fits: permitted development or a planning application.
What are homes in Portstewart like to extend?
Semis and detached houses are typical of Portstewart, and many have room for a rear extension within Northern Ireland's permitted development limits.
How a terraced house rear extension in Portstewart comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check or planning application, then building control drawings to the Northern Ireland Technical Booklets and structural calculations, plus a written agreement with neighbours for any shared-wall work.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Terraced house rear extensions near Portstewart
Close by, we work in Coleraine, about 3.8 miles away, and Limavady, about 13.0 miles away.
- Terraced house rear extension in Coleraine
- Terraced house rear extension in Limavady
- Terraced house rear extension in Derry~Londonderry
- Terraced house rear extension in Ballymena
- Terraced house rear extension in Magherafelt
Other work in Portstewart:
FAQ
Terraced house rear extension questions in Portstewart
How long does a rear extension take to build in Portstewart?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Can a terrace have a two-storey rear extension?
It is possible but harder to get through planning because of the effect on both neighbours.
Is the site visit in Portstewart free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Do I need planning permission for a rear extension 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.