Coity, South Wales Valleys
Terraced house rear extension in Coity
Thinking about a terraced house rear extension in Coity? Rear and side return extensions for terraces, with access through the house and two neighbours. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Coity is covered from our South Wales Valleys round, including CF31, CF32 and CF35. In Coity 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 Coity?
For Coity we work from the Wales rate: £1,910–£3,070 per square metre of new floor, including VAT, 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 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a terraced house rear extension in Coity?
Planning for a terraced house rear extension in Coity follows the Welsh householder rules.
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.
The Party Wall etc. Act 1996 also applies in Wales: two months' notice for work to a shared wall and one month for foundations dug close to a neighbour's building.
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 Coity like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Coity. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a terraced house rear extension in Coity 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.
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 Coity
From Coity, the nearest places we also cover are Bridgend (1.5 miles) and Aberkenfig (2.1 miles).
- Terraced house rear extension in Bridgend
- Terraced house rear extension in Aberkenfig
- Terraced house rear extension in Pyle
- Terraced house rear extension in Porthcawl
- Terraced house rear extension in Maesteg
Other work in Coity:
FAQ
Terraced house rear extension questions in Coity
Can you match the brick or stone on my Coity 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 rear extension take to build in Coity?
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 you build without side access?
Yes. Materials come through the house in protected runs or over the roof by crane on tight sites.
Is the site visit in Coity free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
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.
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.