Neath house extensions
Looking to extend your home in Neath? Start here: extension types, guide prices for Neath, the planning rules that apply and how a project runs.
- Postcode districtsSA10, SA11
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Popular extension prices in Neath
Every figure below is a guide for Neath, adjusted for Wales build costs (×0.93) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
Covering Neath and nearby
We cover Neath and the postcode districts SA10, SA11. The same team covers Briton Ferry (2 miles), Clydach (4 miles), Swansea (7 miles), Gorseinon (10 miles), all within easy reach. For homes towards Mid Glamorgan, Maesteg is around 7 miles away.
Approvals for an extension in Neath
In Wales a single-storey rear extension can usually project up to 4 m beyond the rear wall without a planning application, if it is no more than 4 m high, keeps eaves to 3 m and overall height to 4 m within 2 m of a boundary, and covers no more than half the land around the original house. Wales has no larger home extension prior approval scheme.
In Wales a single-storey side return can fall within permitted development if it stays within the 4 m height limit and the width rules for side extensions. Conservation areas and listed buildings need consent, and the Party Wall Act applies to work on or near a shared wall.
In a conservation area, national park, National Landscape or World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
Building regulations approval is separate from planning. Wales has its own building regulations and approved documents; the council or a registered building control approver checks the plans, inspects the work and issues a completion certificate.
Applications are decided by the local planning authority (your county or county borough council, or the national park authority).
What works best for Neath houses?
In Wales, terraced houses with rear offshoots are common in the towns, while detached houses and bungalows dominate in rural areas.
For many houses here, bungalow extensions, single-storey rear extensions or side return extensions gives the most useful space for the budget.
Extension types and starting prices
- Pitched roof extensions · from £20,500
- Single-storey rear extensions · from £19,500
- Porch extensions · from £3,700
- Double-storey extensions · from £35,000
- Extension plans and drawings · from £1,100
- Glass box extensions · from £27,500
- Utility and boot room extensions · from £13,000
- Bedroom extensions · from £24,000
- Home office extensions · from £14,500
- Kitchen extensions · from £25,000
- Planning permission for extensions · from £300
- Annexe extensions · from £51,000
- Side extensions · from £20,000
- Wraparound extensions · from £33,000
- Orangery extensions · from £27,500
- Side return extensions · from £16,500
- Building regulations for extensions · from £800
- Extensions over a garage · from £22,000
- Conservatory replacement extensions · from £18,500
- Flat roof extensions · from £19,500
- Timber frame extensions · from £19,500
- Bungalow extensions · from £24,000
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Neath
How much does an extension cost in Neath?
Using our Wales factor (×0.93), a standard-spec single-storey extension of 20 m² is a guide £38,000 to £48,500 including VAT, and a 32 m² two-storey extension £53,500 to £70,000. Your written price follows the survey.
Will my neighbours need to be told?
If you apply for planning the council notifies them, and in Wales party wall notices may be needed for work near a shared boundary.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Neath, and the guide-price tool gives a range for your own size and finish in about a minute.
How long does an extension take in Neath?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Do I need planning permission for an extension in Neath?
Not always. It depends on the size, position and your property's history. In Wales many single-storey rear extensions up to 4 m are permitted development.
Book a free site visit in Neath
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.