Gelligaer, South Wales Valleys
Single-storey rear extension in Gelligaer
Thinking about a single-storey rear extension in Gelligaer? Ground-floor space across the back of the house, usually for a kitchen, dining or family room. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Gelligaer is covered from our South Wales Valleys round, including CF82. A depth of 3 to 4 metres keeps many single-storey rear extensions in Gelligaer within permitted development, subject to the house's planning history.
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 single-storey rear extension cost in Gelligaer?
Guide prices for a single-storey rear extension in Gelligaer start from our Wales rate of £1,770–£2,880 per square metre, including VAT. 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 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a single-storey rear extension in Gelligaer?
The planning route for a single-storey rear extension in Gelligaer is set by Wales's householder rules and your council.
In Wales a single-storey rear extension can often be permitted development if it projects no more than 4 metres beyond the rear wall and is no more than 4 metres high. Wales has no prior approval route for deeper extensions, so anything bigger needs a householder planning 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 Gelligaer like to extend?
Gelligaer 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 single-storey rear extension in Gelligaer comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
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.
Single-storey rear extensions near Gelligaer
From Gelligaer, the nearest places we also cover are Nelson (1.4 miles) and Bargoed (1.6 miles).
- Single-storey rear extension in Nelson
- Single-storey rear extension in Bargoed
- Single-storey rear extension in Blackwood
- Single-storey rear extension in Treharris
- Single-storey rear extension in Abercarn
Other work in Gelligaer:
FAQ
Single-storey rear extension questions in Gelligaer
How much does a single-storey rear extension cost in Gelligaer?
As a guide, £1,770–£2,880 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £21,000–£34,500 at that rate. Your written price follows the survey.
What postcode areas do you cover around Gelligaer?
Including CF82, and the surrounding South Wales Valleys area.
Can I stay in the house during the build?
Usually yes. The noisiest, dustiest stage, removing the back wall, is kept to the final weeks and screened off. Most families set up a temporary kitchen elsewhere in the house.
Is the site visit in Gelligaer 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 Gelligaer house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
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.