Gorseinon, Swansea Bay
Wraparound extension in Gorseinon
An L-shaped extension that fills the side return and runs across the back. We design, get the approvals for and build wraparound extensions in Gorseinon and the surrounding area, with one contract from the first survey to building control sign-off.
Gorseinon is covered from our Swansea Bay round, including SA4. Wraparound projects around Gorseinon often involve two neighbours, so we start the party wall conversations early.
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 wraparound extension cost in Gorseinon?
Guide prices for a wraparound extension in Gorseinon start from our Wales rate of £2,050–£3,350 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 |
|---|---|
| L-shaped, about 22 m² of new floor | £45,000–£73,500 |
| L-shaped, about 30 m² of new floor | £61,500–£100,500 |
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 wraparound extension in Gorseinon?
Here is how the rules in Wales apply to a wraparound extension in Gorseinon.
Welsh side-extension rules limit a single-storey side addition to 4 metres high and a 50% increase in the width of the original house, with tighter limits in conservation areas. Wraparounds usually need a planning application.
In Wales, as in England, the Party Wall etc. Act 1996 requires notice to neighbours before work to a shared wall or excavation near their foundations.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development or a householder planning application.
What are homes in Gorseinon like to extend?
Older terraces near the centre and post-war semis further out are typical of Gorseinon. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a wraparound extension in Gorseinon 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.
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.
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.
Wraparound extensions near Gorseinon
Close by, we work in Llanelli, about 5.2 miles away, and Swansea, about 5.4 miles away.
- Wraparound extension in Llanelli
- Wraparound extension in Swansea
- Wraparound extension in Clydach
- Wraparound extension in Ammanford
- Wraparound extension in Briton Ferry
Other work in Gorseinon:
FAQ
Wraparound extension questions in Gorseinon
How long does a rear extension take to build in Gorseinon?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.
How long does a wraparound take?
Usually 14 to 20 weeks on site, longer than a plain rear extension because of the steelwork.
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.
How much does a wraparound extension cost in Gorseinon?
As a guide, £2,050–£3,350 per square metre including VAT for a standard specification. For example, L-shaped, about 22 m² of new floor: about £45,000–£73,500 at that rate. Your written price follows the survey.
Do you handle building control in Gorseinon?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.