Brynmawr, South Wales Valleys
Terraced house rear extension in Brynmawr
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in Brynmawr and want to know what a terraced house rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
We cover Brynmawr (NP22 and NP23) as part of our South Wales Valleys work. Terraced streets make up much of the housing in parts of the South Wales Valleys, and most rear extensions here go in without side access.
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 terraced house rear extension cost in Brynmawr?
In Brynmawr, our guide for a terraced house rear extension is £1,910–£3,070 per square metre including VAT for a standard specification. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £25,500–£41,500 |
| 3 m wide × 6 m deep (18 m²) | £34,500–£55,000 |
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 terraced house rear extension in Brynmawr?
The planning route for a terraced house rear extension in Brynmawr is set by Wales's householder rules and your council.
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.
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. 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 Brynmawr like to extend?
Brynmawr is largely terraced streets on sloping ground, where back gardens step up or down from the house. Excavation, retaining walls and drainage are priced at the survey.
How a terraced house rear extension in Brynmawr 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.
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.
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.
Terraced house rear extensions near Brynmawr
We also build rear extensions for terraced houses in nearby Ebbw Vale (1.9 miles) and Tredegar (3.3 miles).
- Terraced house rear extension in Ebbw Vale
- Terraced house rear extension in Tredegar
- Terraced house rear extension in Abertillery
- Terraced house rear extension in Abergavenny
- Terraced house rear extension in Bargoed
Other work in Brynmawr:
FAQ
Terraced house rear extension questions in Brynmawr
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.
What postcode areas do you cover around Brynmawr?
Including NP22 and NP23, and the surrounding South Wales Valleys area.
How do you keep the house clean?
Dust screens, floor protection and a single protected route through the house.
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.
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.
Is the site visit in Brynmawr free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.