Two-storey extensions in Cwmafan
Everything for a two-storey extension in Cwmafan, in one place: types, guide prices for Wales, the approval rules in Wales and how to get started.
Cwmafan at a glance
- Postcode districts
- SA12 and SA13
- Area
- Swansea and Neath Port Talbot, Wales
- Price region
- Wales
- Nearest towns
- Briton Ferry (2.6 miles), Neath (3.7 miles), Maesteg (4.5 miles), Pyle (7.4 miles)
- Distance to Swansea
- about 7.8 miles
- Approvals
- Two-storey rear: ground floor up to 4 m, first floor up to 3 m and 10.5 m from the rear boundary. Some two-storey side extensions can be permitted development.
Cwmafan sits about 7.8 miles from Swansea. Closer to home, Briton Ferry is 2.6 miles away and Neath 3.7 miles.
Extensions available in Cwmafan

Two-storey rear extensions
From £51,500 in Cwmafan. Free visit to firm it up.
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Two-storey side extensions
Design, approvals and build for Cwmafan homes. Guide from £79,000.
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Two-storey wraparound extensions
Guide from £111,000 in Cwmafan, including VAT.
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Part single, part two-storey extensions
Design, approvals and build for Cwmafan homes. Guide from £66,000.
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Extensions over a garage
From £29,000 in Cwmafan. Free visit to firm it up.
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First-floor extensions
For homes in Cwmafan: typical guide from £23,000.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Cwmafan homes. Guide from £51,500.
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Two-storey extensions for detached houses
Our Wales guide starts at £79,000 for this type.
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Kitchen extensions with bedrooms above
For homes in Cwmafan: typical guide from £51,500 (before kitchen units).
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Extra bedroom and en-suite extensions
From £51,500 (plus en-suite) in Cwmafan. Free visit to firm it up.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Cwmafan, with a rough idea of the approval route and cost for each.
Also available in Swansea and Neath Port Talbot
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Cwmafan
Cwmafan is in Wales. Two-storey rear: ground floor up to 4 m, first floor up to 3 m and 10.5 m from the rear boundary. Some two-storey side extensions can be permitted development. Householder planning application: £585. Councils normally decide householder applications within 8 weeks.
The full Wales rules explained
Questions about extensions in Cwmafan
Do you cover Cwmafan?
Yes. We cover Cwmafan (SA12 and SA13) and the surrounding area, including Briton Ferry and Neath. The first site visit is free.
What does a two-storey extension cost in Cwmafan?
Using our Wales guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £51,500–£69,500 including VAT. An extension over a garage is about £29,000–£42,000.
Which other places near Cwmafan do you cover?
Everywhere around it, including Briton Ferry (2.6 miles), Neath (3.7 miles) and Maesteg (4.5 miles), and the rest of Swansea and Neath Port Talbot.