House extensions in Gwent
Every type of house extension in Gwent, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Towns listed7
- Price regionWales (×0.93)
- Planning rulesWales
- Postcode districts14
Towns we cover in Gwent
Towns we cover here include Newport, Gwent, Cwmbran, Pontypool, Ebbw Vale.
Approvals for an extension in Gwent
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.
What extensions cost in Gwent
We publish guide prices so you can budget before anyone visits. For Gwent they are adjusted by ×0.93, the factor we use across Wales.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
What works best for Gwent houses?
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.
The types we would usually look at first for a home in Gwent are bungalow extensions, single-storey rear extensions and pitched roof extensions, depending on the garden and how the house is laid out.
Choose an extension type
- Bungalow extensions · from £24,000
- Extension plans and drawings · from £1,100
- Side extensions · from £20,000
- Conservatory replacement extensions · from £18,500
- Single-storey rear extensions · from £19,500
- Orangery extensions · from £27,500
- Building regulations for extensions · from £800
- Utility and boot room extensions · from £13,000
- Side return extensions · from £16,500
- Annexe extensions · from £51,000
- Porch extensions · from £3,700
- Wraparound extensions · from £33,000
- Glass box extensions · from £27,500
- Extensions over a garage · from £22,000
- Bedroom extensions · from £24,000
- Timber frame extensions · from £19,500
- Kitchen extensions · from £25,000
- Planning permission for extensions · from £300
- Pitched roof extensions · from £20,500
- Home office extensions · from £14,500
- Double-storey extensions · from £35,000
- Flat roof extensions · from £19,500
Neighbouring areas
Questions about extensions in Gwent
How much does an extension cost in Gwent?
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.
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 you cover all of Gwent?
Yes, across the whole of Gwent. 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 Gwent
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.