Ebbw Vale, South Wales Valleys
Semi-detached rear extension in Ebbw Vale
Single or two-storey extensions for semi-detached houses, with side access and one party wall. If you live in Ebbw Vale and want to know what a semi-detached rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Ebbw Vale is covered from our South Wales Valleys round, including NP23. In Ebbw Vale we measure the attached neighbour's extension at the survey, because it often sets the sensible depth for yours.
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 semi-detached rear extension cost in Ebbw Vale?
For Ebbw Vale we work from the Wales rate: £1,770–£2,880 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 m deep (12 m²) | £21,000–£34,500 |
| 4 m wide × 5 m deep (20 m²) | £35,500–£57,500 |
| 4 m wide × 6 m deep (24 m²) | £42,500–£69,000 |
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 semi-detached rear extension in Ebbw Vale?
The planning route for a semi-detached rear extension in Ebbw Vale is set by Wales's householder rules and your council.
The Welsh Government's householder rules let many homes add a single-storey rear extension up to 4 metres deep and 4 metres high without a planning application. Deeper projects go through a householder application, because Wales has no prior approval route.
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. 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 Ebbw Vale like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Ebbw Vale. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a semi-detached rear extension in Ebbw Vale 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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.
Semi-detached rear extensions near Ebbw Vale
Neighbouring places we cover include Tredegar (1.7 miles) and Brynmawr (1.9 miles).
- Semi-detached rear extension in Tredegar
- Semi-detached rear extension in Brynmawr
- Semi-detached rear extension in Abertillery
- Semi-detached rear extension in Bargoed
- Semi-detached rear extension in Merthyr Tydfil
Other work in Ebbw Vale:
FAQ
Semi-detached rear extension questions in Ebbw Vale
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.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do I need a party wall agreement?
Usually with the attached neighbour, in England and Wales.
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.
What postcode areas do you cover around Ebbw Vale?
Including NP23, and the surrounding South Wales Valleys area.
Is the site visit in Ebbw Vale free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.