Two-storey extensions in Neath
Planning a bigger home in Neath? Compare extension types and guide prices below, then book a free site visit.
Neath at a glance
- Postcode districts
- SA10 and SA11
- Area
- Swansea and Neath Port Talbot, Wales
- Price region
- Wales
- Nearest towns
- Briton Ferry (2.3 miles), Cwmafan (3.7 miles), Clydach (4.3 miles), Swansea (6.6 miles)
- Distance to Swansea
- about 6.6 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.
Around Neath we also work in Briton Ferry, Cwmafan and Clydach, and across the rest of Swansea and Neath Port Talbot. Postcode districts in and near Neath: SA10 and SA11.
Extensions available in Neath

Two-storey rear extensions
Neath guide price from £51,500, Standard spec.
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Two-storey side extensions
From £79,000 in Neath. Free visit to firm it up.
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Two-storey wraparound extensions
Our Wales guide starts at £111,000 for this type.
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Part single, part two-storey extensions
Neath guide price from £66,000, Standard spec.
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Extensions over a garage
Design, approvals and build for Neath homes. Guide from £29,000.
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First-floor extensions
Our Wales guide starts at £23,000 for this type.
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Two-storey extensions for semi-detached houses
Our Wales guide starts at £51,500 for this type.
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Two-storey extensions for detached houses
From £79,000 in Neath. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Neath guide price from £51,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
From £51,500 (plus en-suite) in Neath. Free visit to firm it up.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Swansea and Neath Port Talbot, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Neath
Neath 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 Neath
Do you cover Neath?
Yes. We cover Neath (SA10 and SA11) and the surrounding area, including Briton Ferry and Cwmafan. The first site visit is free.
What does a two-storey extension cost in Neath?
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 Neath do you cover?
Everywhere around it, including Briton Ferry (2.3 miles), Cwmafan (3.7 miles) and Clydach (4.3 miles), and the rest of Swansea and Neath Port Talbot.