Durham, County Durham
Two-storey rear extension in Durham
Thinking about a two-storey rear extension in Durham? A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Durham sits in County Durham, with postcode districts including DH1. In County Durham we check the neighbours' rear windows first, because the upper floor is where most two-storey schemes win or lose planning.
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 two-storey rear extension cost in Durham?
In Durham, our guide for a two-storey rear extension is £1,620–£2,430 per square metre including VAT for a standard specification. North East prices are among the lowest in our range; former mining ground is the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £48,500–£73,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £78,000–£116,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a two-storey rear extension in Durham?
The planning route for a two-storey rear extension in Durham is set by England's householder rules and your council.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Durham like to extend?
Brick terraces, colliery houses and post-war semis make up much of Durham. Former mining areas often need a coal mining risk check before foundations are designed.
How a two-storey rear extension in Durham 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Two-storey rear extensions near Durham
We also build two-storey rear extensions in nearby Spennymoor (5.5 miles) and Chester-le-Street (5.7 miles).
- Two-storey rear extension in Spennymoor
- Two-storey rear extension in Chester-le-Street
- Two-storey rear extension in Hetton-le-Hole
- Two-storey rear extension in Houghton-le-Spring
- Two-storey rear extension in Stanley
Other work in Durham:
FAQ
Two-storey rear extension questions in Durham
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.
Can you match the brick or stone on my Durham house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Can I add an en-suite upstairs?
Yes. We plan the soil pipe route early so the bathroom sits where drainage works without boxing through the room below.
Do you handle building control in Durham?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
What postcode areas do you cover around Durham?
Including DH1, and the surrounding County Durham area.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.