House extensions in Gloucestershire
From a small utility to a two-storey addition, we take on house extensions throughout Gloucestershire, starting with a free visit and a planning check.
- Towns listed10
- Price regionSouth West England (×1.02)
- Planning rulesEngland
- Postcode districts35
Towns we cover in Gloucestershire
Towns we cover here include Gloucester, Cheltenham, Stroud, Kingswood.
Planning and building control in Gloucestershire
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In a conservation area, national park, National Landscape, the Broads or a 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. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Popular extension prices in Gloucestershire
We publish guide prices so you can budget before anyone visits. For Gloucestershire they are adjusted by ×1.02, the factor we use across South West England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Kitchen extensions | 20 m² | £42,500 – £54,500 |
| Side return extensions | 11 m² | £26,500 – £34,000 |
| Single-storey rear extensions | 20 m² | £41,500 – £53,500 |
| Orangery extensions | 16 m² | £45,500 – £57,500 |
| Extensions over a garage | 12 m² | £25,500 – £33,500 |
| Conservatory replacement extensions | 14 m² | £30,500 – £39,500 |
| Wraparound extensions | 25 m² | £58,500 – £74,000 |
What works best for Gloucestershire houses?
In the South West, local stone, render and brick vary from town to town, so matching materials is a big part of designing an extension that looks right.
Depending on the plot, pitched roof extensions and annexe extensions are often the strongest options, with orangery extensions worth considering where there is room.
Extension types and starting prices
- Bedroom extensions · from £26,500
- Annexe extensions · from £56,000
- Kitchen extensions · from £27,500
- Bungalow extensions · from £26,500
- Pitched roof extensions · from £22,500
- Side return extensions · from £18,000
- Wraparound extensions · from £36,500
- Timber frame extensions · from £21,000
- Home office extensions · from £16,000
- Building regulations for extensions · from £900
- Side extensions · from £22,000
- Extension plans and drawings · from £1,200
- Extensions over a garage · from £24,000
- Conservatory replacement extensions · from £20,000
- Single-storey rear extensions · from £21,000
- Double-storey extensions · from £38,500
- Glass box extensions · from £30,500
- Planning permission for extensions · from £350
- Porch extensions · from £4,050
- Orangery extensions · from £30,500
- Utility and boot room extensions · from £14,000
- Flat roof extensions · from £21,000
Neighbouring areas
Questions about extensions in Gloucestershire
How much does an extension cost in Gloucestershire?
With our South West England factor (×1.02), a standard-spec 20 m² single-storey extension is a guide £41,500 to £53,500 including VAT. Prices for every type are linked on this page.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
How long does an extension take in Gloucestershire?
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.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Book a free site visit in Gloucestershire
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.