Home extensions in Abergavenny
Looking to extend your home in Abergavenny? Start here: extension types, guide prices for Abergavenny, the planning rules that apply and how a project runs.
- Postcode districtsNP7
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Planning rules in Abergavenny
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.
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).
Which extension suits a Abergavenny 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.
The types we would usually look at first for a home in Abergavenny are side return extensions, pitched roof extensions and single-storey rear extensions, depending on the garden and how the house is laid out.
Guide prices for Abergavenny
Prices on this page use our Wales factor of ×0.93, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
Covering Abergavenny and nearby
Our survey diary covers Abergavenny, including NP7. The same team covers Pontypool (9 miles), Ebbw Vale (9 miles), Cwmbran (12 miles), Monmouth (12 miles), Newport, Gwent (17 miles), all within easy reach. Just over the Mid Glamorgan border, Blackwood is about 14 miles away.
Extension types and starting prices
- Bungalow extensions · from £24,000
- Flat roof extensions · from £19,500
- Home office extensions · from £14,500
- Conservatory replacement extensions · from £18,500
- Timber frame extensions · from £19,500
- Porch extensions · from £3,700
- Pitched roof extensions · from £20,500
- Single-storey rear extensions · from £19,500
- Extension plans and drawings · from £1,100
- Wraparound extensions · from £33,000
- Orangery extensions · from £27,500
- Utility and boot room extensions · from £13,000
- Bedroom extensions · from £24,000
- Double-storey extensions · from £35,000
- Kitchen extensions · from £25,000
- Side return extensions · from £16,500
- Building regulations for extensions · from £800
- Extensions over a garage · from £22,000
- Annexe extensions · from £51,000
- Glass box extensions · from £27,500
- Side extensions · from £20,000
- Planning permission for extensions · from £300
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Abergavenny
How much does an extension cost in Abergavenny?
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.
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.
Do you cover all of Abergavenny?
Yes, including the surrounding parts of Gwent. Site visits are free and there is no obligation.
Book a free site visit in Abergavenny
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.