Abertillery, South Wales Valleys
Two-storey rear extension in Abertillery
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 Abertillery and the surrounding area, with one contract from the first survey to building control sign-off.
Abertillery and its postcode districts NP13 are part of our South Wales Valleys coverage. Two-storey rear extensions suit semi-detached houses in Abertillery 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 Abertillery?
In Abertillery, 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 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a two-storey rear extension in Abertillery?
Whether your two-storey rear extension in Abertillery needs a planning application depends on its size, your house and any local restrictions.
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 Abertillery like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Abertillery. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a two-storey rear extension in Abertillery 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.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Two-storey rear extensions near Abertillery
We also build two-storey rear extensions in nearby Pontypool (4.3 miles) and Ebbw Vale (4.5 miles).
- Two-storey rear extension in Pontypool
- Two-storey rear extension in Ebbw Vale
- Two-storey rear extension in Brynmawr
- Two-storey rear extension in Blackwood
- Two-storey rear extension in Bargoed
Other work in Abertillery:
FAQ
Two-storey rear extension questions in Abertillery
Do you handle building control in Abertillery?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.
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.
Does a two-storey rear extension need planning permission?
Almost always. England and Northern Ireland allow 3 metres without an application only if at least 7 metres remains to the rear boundary; Wales and Scotland are similar or stricter.
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 I need planning permission for a rear extension in Abertillery?
Often not for a single-storey rear extension of up to 4 metres under Welsh permitted development. Wales has no prior approval route for deeper extensions.
How long does a rear extension take to build in Abertillery?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.