Extending your home in Rhondda
Every type of house extension in Rhondda, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsCF40, CF41, CF42, CF43
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Do extensions in Rhondda need planning permission?
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).
Areas we cover around Rhondda
Our survey diary covers Rhondda, including CF40, CF41, CF42, CF43. We also work in nearby Tonypandy (3 miles), Aberdare (4 miles), Pontypridd (6 miles), Merthyr Tydfil (7 miles), Gelligaer (8 miles). For homes towards Gwent, Ebbw Vale is around 13 miles away.
Rhondda extension prices at a glance
Use these Rhondda guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
Choosing the right extension in Rhondda
Welsh housing ranges from stone terraces in the valleys to render-and-slate houses and modern estates, and the Welsh planning rules differ from England's in several places.
Start by comparing side return extensions, pitched roof extensions and bungalow extensions: between them they cover most of the layouts we see requested for houses like these.
Choose an extension type
- Planning permission for extensions · from £300
- Porch extensions · from £3,700
- Utility and boot room extensions · from £13,000
- Building regulations for extensions · from £800
- Wraparound extensions · from £33,000
- Home office extensions · from £14,500
- Side extensions · from £20,000
- Timber frame extensions · from £19,500
- Annexe extensions · from £51,000
- Extensions over a garage · from £22,000
- Bedroom extensions · from £24,000
- Glass box extensions · from £27,500
- Orangery extensions · from £27,500
- Bungalow extensions · from £24,000
- Kitchen extensions · from £25,000
- Single-storey rear extensions · from £19,500
- Side return extensions · from £16,500
- Extension plans and drawings · from £1,100
- Conservatory replacement extensions · from £18,500
- Double-storey extensions · from £35,000
- Pitched roof extensions · from £20,500
- Flat roof extensions · from £19,500
Free site visit
We visit your Rhondda home, measure up, talk through what you want and check the planning position.
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
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Rhondda
How much does an extension cost in Rhondda?
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 Rhondda?
Yes, including the surrounding parts of Mid Glamorgan. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Rhondda, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Rhondda
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.