Hetton-le-Hole, County Durham
Semi-detached rear extension in Hetton-le-Hole
Single or two-storey extensions for semi-detached houses, with side access and one party wall. We design, get the approvals for and build rear extensions for semi-detached houses in Hetton-le-Hole and the surrounding area, with one contract from the first survey to building control sign-off.
Hetton-le-Hole and its postcode districts DH4 and DH5 are part of our County Durham coverage. Semi-detached houses are common across County Durham, and their side access makes rear extensions quicker to build.
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 semi-detached rear extension cost in Hetton-le-Hole?
For Hetton-le-Hole we work from the North East England rate: £1,710–£2,790 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) | £20,500–£33,500 |
| 4 m wide × 5 m deep (20 m²) | £34,000–£56,000 |
| 4 m wide × 6 m deep (24 m²) | £41,000–£67,000 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a semi-detached rear extension in Hetton-le-Hole?
Planning for a semi-detached rear extension in Hetton-le-Hole follows the English householder rules.
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.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Hetton-le-Hole like to extend?
Brick terraces, colliery houses and post-war semis make up much of Hetton-le-Hole. Former mining areas often need a coal mining risk check before foundations are designed.
How a semi-detached rear extension in Hetton-le-Hole comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
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, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Semi-detached rear extensions near Hetton-le-Hole
Neighbouring places we cover include Houghton-le-Spring (1.7 miles) and Seaham (4.4 miles).
- Semi-detached rear extension in Houghton-le-Spring
- Semi-detached rear extension in Seaham
- Semi-detached rear extension in Ryhope
- Semi-detached rear extension in Durham
- Semi-detached rear extension in Chester-le-Street
Other work in Hetton-le-Hole:
FAQ
Semi-detached rear extension questions in Hetton-le-Hole
How long does a rear extension take to build in Hetton-le-Hole?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Can I match pebbledash or render?
Yes. Many semis are refinished with new render across the whole back elevation so old and new match.
Is the site visit in Hetton-le-Hole free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Hetton-le-Hole house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
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.