Powys house extensions
More space without moving: we plan and build extensions across Powys, with one team for the drawings, the council and the build.
- Towns listed4
- Price regionWales (×0.93)
- Planning rulesWales
- Postcode districts18
Towns we cover in Powys
Towns we cover here include Brecon, Llandrindod Wells, Newtown, Welshpool.
Planning rules in Powys
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 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.
Choosing the right extension in Powys
In Wales, terraced houses with rear offshoots are common in the towns, while detached houses and bungalows dominate in rural areas.
Depending on the plot, side return extensions and pitched roof extensions are often the strongest options, with bungalow extensions worth considering where there is room.
Popular extension prices in Powys
Every figure below is a guide for Powys, 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) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
All extension types we build in Powys
- Extension plans and drawings · from £1,100
- Double-storey extensions · from £35,000
- Bedroom extensions · from £24,000
- Planning permission for extensions · from £300
- Home office extensions · from £14,500
- Pitched roof extensions · from £20,500
- Glass box extensions · from £27,500
- Timber frame extensions · from £19,500
- Wraparound extensions · from £33,000
- Side extensions · from £20,000
- Building regulations for extensions · from £800
- Extensions over a garage · from £22,000
- Flat roof extensions · from £19,500
- Side return extensions · from £16,500
- Single-storey rear extensions · from £19,500
- Porch extensions · from £3,700
- Conservatory replacement extensions · from £18,500
- Kitchen extensions · from £25,000
- Annexe extensions · from £51,000
- Orangery extensions · from £27,500
- Utility and boot room extensions · from £13,000
- Bungalow extensions · from £24,000
Neighbouring areas
Questions about extensions in Powys
How much does an extension cost in Powys?
With our Wales factor (×0.93), a standard-spec 20 m² single-storey extension is a guide £38,000 to £48,500 including VAT. Prices for every type are linked on this page.
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.
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.
How long does an extension take in Powys?
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.
Book a free site visit in Powys
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.