Brynmawr, South Wales Valleys
Single-storey rear extension in Brynmawr
Ground-floor space across the back of the house, usually for a kitchen, dining or family room. We design, get the approvals for and build single-storey rear extensions in Brynmawr and the surrounding area, with one contract from the first survey to building control sign-off.
Brynmawr and its postcode districts NP22 and NP23 are part of our South Wales Valleys coverage. On stone terraces and post-war semis like those around Brynmawr, a single-storey rear extension is usually the simplest way to fix a small back kitchen without touching the bedrooms.
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 single-storey rear extension cost in Brynmawr?
A single-storey rear extension in Brynmawr is priced at £1,770–£2,880 per square metre including VAT as a guide, before kitchen fit-out and fees. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,000–£34,500 |
| 4 m wide × 5 m deep (20 m²) | £35,500–£57,500 |
| 4 m wide × 6 m deep (24 m²) | £42,500–£69,000 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a single-storey rear extension in Brynmawr?
Here is how the rules in Wales apply to a single-storey rear extension in Brynmawr.
Welsh permitted development allows a single-storey rear extension of up to 4 metres in depth and 4 metres in height, subject to boundary and garden-coverage limits. There is no larger-extension prior approval scheme in Wales.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Brynmawr like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Brynmawr. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a single-storey rear extension in Brynmawr 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.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Single-storey rear extensions near Brynmawr
Neighbouring places we cover include Ebbw Vale (1.9 miles) and Tredegar (3.3 miles).
- Single-storey rear extension in Ebbw Vale
- Single-storey rear extension in Tredegar
- Single-storey rear extension in Abertillery
- Single-storey rear extension in Abergavenny
- Single-storey rear extension in Bargoed
Other work in Brynmawr:
FAQ
Single-storey rear extension questions in Brynmawr
Can you match the brick or stone on my Brynmawr house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
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 I stay in the house during the build?
Usually yes. The noisiest, dustiest stage, removing the back wall, is kept to the final weeks and screened off. Most families set up a temporary kitchen elsewhere in the house.
Do you handle building control in Brynmawr?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
How long does a rear extension take to build in Brynmawr?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.