Welshpool house extensions
We design and build house extensions for homes in Welshpool and the surrounding Powys area, with guide prices adjusted for the region.
- Postcode districtsSY21
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Planning and building control in Welshpool
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 rear extension of more than one storey can be permitted development only if the ground floor projects no more than 4 m, the upper floor no more than 3 m, it stays at least 10.5 m from the rear boundary and it is not in a conservation area, national park, National Landscape or World Heritage Site. Anything larger needs a planning application to the council.
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).
Covering Welshpool and nearby
Our survey diary covers Welshpool, including SY21. The same team covers Newtown (11 miles), Llandrindod Wells (28 miles), Brecon (49 miles), all within easy reach. For homes towards Clwyd, Rhosllannerchrugog is around 25 miles away.
Popular extension prices in Welshpool
Every figure below is a guide for Welshpool, 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) |
|---|---|---|
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| 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 |
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
Which extension suits a Welshpool home?
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 single-storey rear extensions are often the strongest options, with pitched roof extensions worth considering where there is room.
Choose an extension type
- Bungalow extensions · from £24,000
- Building regulations for extensions · from £800
- Flat roof extensions · from £19,500
- Wraparound extensions · from £33,000
- Home office extensions · from £14,500
- Orangery extensions · from £27,500
- Porch extensions · from £3,700
- Pitched roof extensions · from £20,500
- Conservatory replacement extensions · from £18,500
- Single-storey rear extensions · from £19,500
- Kitchen extensions · from £25,000
- Bedroom extensions · from £24,000
- Double-storey extensions · from £35,000
- Side extensions · from £20,000
- Planning permission for extensions · from £300
- Utility and boot room extensions · from £13,000
- Timber frame extensions · from £19,500
- Side return extensions · from £16,500
- Extensions over a garage · from £22,000
- Annexe extensions · from £51,000
- Glass box extensions · from £27,500
- Extension plans and drawings · from £1,100
Free site visit
We visit your Welshpool home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
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 Welshpool
How much does an extension cost in Welshpool?
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.
Do you cover all of Welshpool?
Yes, including the surrounding parts of Powys. Site visits are free and there is no obligation.
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.
Do I need planning permission for an extension in Welshpool?
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 Welshpool
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.