Clydach, Swansea Bay
Two-storey rear extension in Clydach
We plan and build two-storey rear extensions for homeowners in Clydach. A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. Start with a free site visit, then a written price once the design is agreed.
Clydach sits in Swansea Bay, with postcode districts including SA5, SA6 and SA7. In Swansea Bay we check the neighbours' rear windows first, because the upper floor is where most two-storey schemes win or lose planning.
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 Clydach?
In Clydach, 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 Clydach?
Planning for a two-storey rear extension in Clydach follows the Welsh householder rules.
Welsh rules allow a two-storey rear extension without an application only where the ground floor is no deeper than 4 metres, the upper floor no deeper than 3 metres and at least 10.5 metres remains to the rear boundary. Most homeowners still apply for householder planning permission.
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 Clydach like to extend?
Older terraces near the centre and post-war semis further out are typical of Clydach. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a two-storey rear extension in Clydach 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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 Clydach
We also build two-storey rear extensions in nearby Neath (4.3 miles) and Swansea (4.7 miles).
- Two-storey rear extension in Neath
- Two-storey rear extension in Swansea
- Two-storey rear extension in Briton Ferry
- Two-storey rear extension in Gorseinon
- Two-storey rear extension in Ystalyfera
Other work in Clydach:
FAQ
Two-storey rear extension questions in Clydach
Do I need planning permission for a rear extension in Clydach?
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.
Do you handle building control in Clydach?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.
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.
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 Clydach?
Including SA5, SA6 and SA7, and the surrounding Swansea Bay area.
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.