Extending your home in Ammanford
Planning an extension in Ammanford? Compare extension types, see guide prices adjusted for Ammanford and book a free site visit.
- Postcode districtsSA18
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Where we work near Ammanford
Site visits are available across Ammanford (SA18). We also work in nearby Llanelli (11 miles), Carmarthen (14 miles), Pembroke Dock (41 miles), Haverfordwest (42 miles), Aberystwyth (43 miles). For homes towards West Glamorgan, Clydach is around 8 miles away.
Ammanford extension prices at a glance
Every figure below is a guide for Ammanford, 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) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
What works best for Ammanford houses?
In Wales, terraced houses with rear offshoots are common in the towns, while detached houses and bungalows dominate in rural areas.
Start by comparing side return extensions, bungalow extensions and pitched roof extensions: between them they cover most of the layouts we see requested for houses like these.
Planning rules in Ammanford
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.
The Party Wall etc. Act 1996 applies in Wales as in England: notice must be served before work to a shared wall, building on the boundary, or excavating close to a neighbour's foundations.
Applications are decided by the local planning authority (your county or county borough council, or the national park authority).
Every extension type in Ammanford
- Pitched roof extensions · from £20,500
- Annexe extensions · from £51,000
- Double-storey extensions · from £35,000
- Extensions over a garage · from £22,000
- Bedroom extensions · from £24,000
- Timber frame extensions · from £19,500
- Glass box extensions · from £27,500
- Conservatory replacement extensions · from £18,500
- Side return extensions · from £16,500
- Planning permission for extensions · from £300
- Building regulations for extensions · from £800
- Home office extensions · from £14,500
- Wraparound extensions · from £33,000
- Side extensions · from £20,000
- Porch extensions · from £3,700
- Kitchen extensions · from £25,000
- Flat roof extensions · from £19,500
- Extension plans and drawings · from £1,100
- Single-storey rear extensions · from £19,500
- Utility and boot room extensions · from £13,000
- Orangery extensions · from £27,500
- Bungalow extensions · from £24,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Ammanford
How much does an extension cost in Ammanford?
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.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
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.
Do you cover all of Ammanford?
Yes, including the surrounding parts of Dyfed. Site visits are free and there is no obligation.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Ammanford
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.