Cwmbran, South Wales Valleys
Wraparound extension in Cwmbran
For homes in Cwmbran, a wraparound extension is often the simplest way to gain space without moving. An L-shaped extension that fills the side return and runs across the back. We take it from survey to completion certificate.
Cwmbran is covered from our South Wales Valleys round, including NP44. Wraparounds are the natural next step for the end-of-terrace and Victorian houses in the South Wales Valleys where a side return alone would leave the room too narrow.
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 wraparound extension cost in Cwmbran?
Guide prices for a wraparound extension in Cwmbran start from our Wales rate of £2,050–£3,350 per square metre, including VAT. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £45,000–£73,500 |
| L-shaped, about 30 m² of new floor | £61,500–£100,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a wraparound extension in Cwmbran?
The planning route for a wraparound extension in Cwmbran is set by Wales's householder rules and your council.
Welsh side-extension rules limit a single-storey side addition to 4 metres high and a 50% increase in the width of the original house, with tighter limits in conservation areas. Wraparounds usually need a planning application.
In Wales, as in England, the Party Wall etc. Act 1996 requires notice to neighbours before work to a shared wall or excavation near their foundations.
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 Cwmbran like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Cwmbran. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a wraparound extension in Cwmbran 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.
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.
Wraparound extensions near Cwmbran
We also build wraparound extensions in nearby Pontypool (3.4 miles) and Caerleon (4.3 miles).
- Wraparound extension in Pontypool
- Wraparound extension in Caerleon
- Wraparound extension in Risca
- Wraparound extension in Newport
- Wraparound extension in Abercarn
Other work in Cwmbran:
FAQ
Wraparound extension questions in Cwmbran
Is the site visit in Cwmbran 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 Cwmbran house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How long does a wraparound take?
Usually 14 to 20 weeks on site, longer than a plain rear extension because of the steelwork.
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.
What postcode areas do you cover around Cwmbran?
Including NP44, and the surrounding South Wales Valleys area.
Do I need a party wall agreement?
In Wales, usually yes if the extension is on or near a shared boundary or close to a neighbour's foundations. We serve the notices.