Ystalyfera, Swansea Bay
Kitchen-diner rear extension in Ystalyfera
An open-plan kitchen, dining and family room that opens straight onto the garden. If you live in Ystalyfera and want to know what a kitchen-diner rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Ystalyfera and its postcode districts SA9 are part of our Swansea Bay coverage. A kitchen-diner is often the reason people in Ystalyfera extend: the back kitchen in older terraces and post-war semis is rarely big enough for a table.
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 kitchen-diner rear extension cost in Ystalyfera?
In Ystalyfera, our guide for a kitchen-diner rear extension is £1,770–£2,880 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 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 kitchen-diner rear extension in Ystalyfera?
Here is how the rules in Wales apply to a kitchen-diner rear extension in Ystalyfera.
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.
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 Ystalyfera like to extend?
Older terraces near the centre and post-war semis further out are typical of Ystalyfera. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a kitchen-diner rear extension in Ystalyfera 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.
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.
Kitchen-diner rear extensions near Ystalyfera
We also build kitchen-diner rear extensions in nearby Neath (7.3 miles) and Clydach (7.7 miles).
- Kitchen-diner rear extension in Neath
- Kitchen-diner rear extension in Clydach
- Kitchen-diner rear extension in Ammanford
- Kitchen-diner rear extension in Briton Ferry
- Kitchen-diner rear extension in Maesteg
Other work in Ystalyfera:
FAQ
Kitchen-diner rear extension questions in Ystalyfera
Do I need planning permission for a rear extension in Ystalyfera?
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.
Is the site visit in Ystalyfera free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Should the sink face the garden?
If the plan allows, an island sink or hob facing the glass is a common choice. It needs a floor-level drain run, which is easy to lay in a new slab.
How much does a kitchen-diner rear extension cost in Ystalyfera?
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.
How long does a rear extension take to build in Ystalyfera?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.