Risca, South Wales Valleys
Terraced house rear extension in Risca
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in Risca 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.
Risca and its postcode districts NP11 are part of our South Wales Valleys coverage. In Risca we plan the delivery route through the house and the skip licence before anything else.
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 Risca?
A terraced house rear extension in Risca is priced at £1,910–£3,070 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 × 4.5 m deep (13.5 m²) | £25,500–£41,500 |
| 3 m wide × 6 m deep (18 m²) | £34,500–£55,000 |
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 terraced house rear extension in Risca?
The planning route for a terraced house rear extension in Risca 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. At the first visit we measure what is there now and tell you which route fits: permitted development or a householder planning application.
What are homes in Risca like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Risca. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a terraced house rear extension in Risca 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Approvals
Permitted development check or householder planning application, then Building Regulations drawings to the Welsh Approved Documents 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.
Terraced house rear extensions near Risca
We also build rear extensions for terraced houses in nearby Abercarn (3.1 miles) and Newport (4.6 miles).
- Terraced house rear extension in Abercarn
- Terraced house rear extension in Newport
- Terraced house rear extension in Cwmbran
- Terraced house rear extension in Caerphilly
- Terraced house rear extension in Blackwood
Other work in Risca:
FAQ
Terraced house rear extension questions in Risca
Do you handle building control in Risca?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.
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.
Do both neighbours need party wall notices?
Usually yes in England and Wales, because the extension often sits on or near both boundaries.
What postcode areas do you cover around Risca?
Including NP11, and the surrounding South Wales Valleys area.
Is the site visit in Risca 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 Risca house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.