Northumberland
Rear extensions for bungalows in Northumberland
Single-storey rear extensions that keep everything on one level. Rear extensions in Northumberland: we cover 10 towns including Blyth, Cramlington and Ashington, with design, approvals and the build under one contract.
For Blyth bungalows we design the roof first, because the low eaves decide the height of the new room. Brick terraces, colliery houses and post-war semis make up much of Northumberland. Former mining areas often need a coal mining risk check before foundations are designed.
How much does a bungalow rear extension cost in Northumberland?
For Northumberland we work from the North East England rate: £1,660–£2,700 per square metre of new floor, including VAT, 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 wide × 4 m deep (12 m²) | £20,000–£32,500 |
| 4 m wide × 6 m deep (24 m²) | £40,000–£65,000 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission in Northumberland?
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent.
Where in Northumberland do we work?
FAQ
Questions people ask
Can a bungalow extension be fully accessible?
Yes: level thresholds, wider doors and a wet room are straightforward to design in.
Will the roof look odd?
Not if the pitch and tiles match. Where the eaves are low, a flat-roofed section with a lantern is an alternative.
Can I extend the loft as well?
Sometimes, but that is a different project; a rear extension keeps everything on one level.
Do you cover all of Northumberland?
We cover 10 towns and districts in Northumberland, including Blyth, Cramlington and Ashington.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.