Abercarn, South Wales Valleys
Two-storey rear extension in Abercarn
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Abercarn and the surrounding area, with one contract from the first survey to building control sign-off.
Abercarn sits in the South Wales Valleys, with postcode districts including NP11. Two-storey rear extensions suit semi-detached houses in Abercarn best, where the extra bedroom matters as much as the bigger kitchen.
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 two-storey rear extension cost in Abercarn?
In Abercarn, our guide for a two-storey rear extension is £1,670–£2,510 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 × 5 m footprint, two floors (30 m²) | £50,000–£75,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £80,500–£120,500 |
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 two-storey rear extension in Abercarn?
Here is how the rules in Wales apply to a two-storey rear extension in Abercarn.
In Wales a rear extension of more than one storey can be permitted development if the ground floor projects no more than 4 metres and the upper floor no more than 3 metres, with at least 10.5 metres to the rear boundary. It is not permitted development in conservation areas, National Parks or National Landscapes, so many double-storey schemes need a householder application.
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 Abercarn like to extend?
Abercarn 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 two-storey rear extension in Abercarn 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.
Paperwork handled
Planning or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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.
Two-storey rear extensions near Abercarn
Close by, we work in Risca, about 3.1 miles away, and Blackwood, about 3.4 miles away.
- Two-storey rear extension in Risca
- Two-storey rear extension in Blackwood
- Two-storey rear extension in Cwmbran
- Two-storey rear extension in Bargoed
- Two-storey rear extension in Gelligaer
Other work in Abercarn:
FAQ
Two-storey rear extension questions in Abercarn
Can you match the brick or stone on my Abercarn house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
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.
Is two-storey cheaper per square metre than single-storey?
Usually yes, because the foundations and roof are shared across twice the floor area. The total cost is higher.
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 Abercarn free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Abercarn?
Including NP11, and the surrounding South Wales Valleys area.