Derry~Londonderry, County Londonderry
Side return extension in Derry~Londonderry
Side return extension in Derry~Londonderry: infilling the narrow passage beside a Victorian or Edwardian back addition. We measure the house, show you what the rules allow, price it in writing and build it.
Derry~Londonderry sits in County Londonderry, with postcode districts including BT48. Side returns suit the Victorian and Edwardian terraces found across parts of County Londonderry, where the kitchen sits in a narrow back addition.
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 side return extension cost in Derry~Londonderry?
Guide prices for a side return extension in Derry~Londonderry start from our Northern Ireland rate of £2,000–£3,310 per square metre, including VAT. Northern Ireland prices are the lowest in our range.
| Size | Guide price inc VAT |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £24,000–£39,500 |
| 2.5 m wide × 7 m deep (17.5 m²) | £35,000–£58,000 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a side return extension in Derry~Londonderry?
Whether your side return extension in Derry~Londonderry needs a planning application depends on its size, your house and any local restrictions.
Northern Ireland's rules restrict side extensions more than rear ones, so a side infill or wraparound usually needs a planning application to the council as well as building control approval.
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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Derry~Londonderry like to extend?
Semis and detached houses are typical of Derry~Londonderry, and many have room for a rear extension within Northern Ireland's permitted development limits.
How a side return extension in Derry~Londonderry 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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.
Side return extensions near Derry~Londonderry
We also build side return extensions in nearby Strabane (13.6 miles) and Limavady (14.7 miles).
- Side return extension in Strabane
- Side return extension in Limavady
- Side return extension in Portstewart
- Side return extension in Coleraine
- Side return extension in Omagh
Other work in Derry~Londonderry:
FAQ
Side return extension questions in Derry~Londonderry
Is the site visit in Derry~Londonderry free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Where does the drainage go?
Side passages often carry the soil and rainwater pipes. We survey them first and reroute them under the new floor where needed.
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.
Do you handle building control in Derry~Londonderry?
Yes. We apply to the council's building control team and hand over the completion certificate.
What postcode areas do you cover around Derry~Londonderry?
Including BT48, and the surrounding County Londonderry area.