Dumfries and Galloway
Rear extensions for detached houses in Dumfries and Galloway
Wider, deeper rear extensions with room for vaulted roofs and big glazing. Across Dumfries and Galloway we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Dumfries, Stranraer and Annan.
Post-war semis and terraces are common around Dumfries and Galloway, and many have room for a single-storey rear extension within Class 1A limits.
How much does a detached house rear extension cost in Dumfries and Galloway?
Guide prices for a detached house rear extension in Dumfries and Galloway start from our Scotland rate of £1,850–£3,040 per square metre, including VAT. Prices in Scotland sit a little below our West Midlands baseline; building warrant fees and drawings are budgeted separately.
| Size | Guide price inc VAT |
|---|---|
| 4 m wide × 6 m deep (24 m²) | £44,500–£73,000 |
| 5 m wide × 8 m deep (40 m²) | £74,000–£121,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission in Dumfries and Galloway?
Scottish householder permitted development (Class 1A) covers many single-storey rear extensions, with a 3 metre eaves limit, a 4 metre height limit and, within 1 metre of a boundary, a depth limit of 3 metres for terraced houses or 4 metres for others. Conservation areas are excluded, and you need a building warrant whatever the planning position.
Scotland has no larger-extension prior approval route; extensions beyond permitted development need a planning application.
Scottish Class 1B rights for extensions of more than one storey need a 10 metre gap to every boundary, which few gardens have. Expect a planning application as well as a building warrant for a double-storey rear extension.
Classes 1A and 1B do not apply in conservation areas, and listed buildings need listed building consent.
Where in Dumfries and Galloway do we work?
FAQ
Questions people ask
Can I have a vaulted ceiling?
Yes, with a pitched roof and exposed or boxed rafters, subject to the height limits.
Is an oak frame worth it?
It is a premium finish with a long life; it costs more than blockwork with a plain roof.
Does a big extension need more heating?
Usually yes. We size underfloor heating or new radiators to the room.
Do you cover all of Dumfries and Galloway?
We cover 4 towns and districts in Dumfries and Galloway, including Dumfries, Stranraer and Annan.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.