Risca house extensions
Every type of house extension in Risca, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsNP11
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Planning rules in Risca
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 extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house, and it must not come closer to a highway than the existing side wall. Larger side extensions need planning permission.
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).
Where we work near Risca
Postcode districts we cover around Risca include NP11. Neighbouring towns we cover include Caerphilly (6 miles), Blackwood (6 miles), Gelligaer (8 miles), Pontypridd (10 miles), Tonypandy (15 miles). Newport, Gwent, in Gwent, is roughly 5 miles from Risca and also on our list.
Which extension suits a Risca home?
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 pitched roof extensions, bungalow extensions and side return extensions: between them they cover most of the layouts we see requested for houses like these.
What extensions cost in Risca
We publish guide prices so you can budget before anyone visits. For Risca they are adjusted by ×0.93, the factor we use across Wales.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
Choose an extension type
- Side extensions · from £20,000
- Conservatory replacement extensions · from £18,500
- Flat roof extensions · from £19,500
- Double-storey extensions · from £35,000
- Bungalow extensions · from £24,000
- Timber frame extensions · from £19,500
- Wraparound extensions · from £33,000
- Bedroom extensions · from £24,000
- Orangery extensions · from £27,500
- Home office extensions · from £14,500
- Glass box extensions · from £27,500
- Extension plans and drawings · from £1,100
- Kitchen extensions · from £25,000
- Side return extensions · from £16,500
- Extensions over a garage · from £22,000
- Porch extensions · from £3,700
- Single-storey rear extensions · from £19,500
- Utility and boot room extensions · from £13,000
- Pitched roof extensions · from £20,500
- Building regulations for extensions · from £800
- Planning permission for extensions · from £300
- Annexe extensions · from £51,000
Free site visit
We visit your Risca 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
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 Risca
How much does an extension cost in Risca?
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.
Do I need planning permission for an extension in Risca?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Risca, 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 Risca?
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 Risca
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.