County Down
Pitched and lean-to roof rear extensions in County Down
Lean-to, gable and hipped roofs that give a vaulted ceiling. Across County Down we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Bangor, Castlereagh and Newtownards.
Pitched roofs suit the cottages and slate-roofed houses in parts of County Down. Semis and detached houses are typical of County Down, and many have room for a rear extension within Northern Ireland's permitted development limits.
How much does a pitched-roof rear extension cost in County Down?
A pitched-roof rear extension in County Down is priced at £1,740–£2,830 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 m deep (12 m²) | £21,000–£34,000 |
| 4 m wide × 5 m deep (20 m²) | £35,000–£56,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission in County Down?
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.
Conservation areas, Areas of Outstanding Natural Beauty and listed buildings restrict permitted development in Northern Ireland.
Where in County Down do we work?
FAQ
Questions people ask
Will a lean-to fit under my windows?
We check the sill heights at the survey; low windows usually mean a flat roof instead.
Are roof windows allowed?
Yes; they are the usual way to bring light into a pitched-roof extension.
Is a pitched roof more expensive?
Slightly, typically a few per cent more than a flat roof of the same area.
Do you cover all of County Down?
We cover 8 towns and districts in County Down, including Bangor, Castlereagh and Newtownards.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.