Home extensions in Newbury
Looking to extend your home in Newbury? Start here: extension types, guide prices for Newbury, the planning rules that apply and how a project runs.
- Postcode districtsRG14, RG20
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Newbury extension prices at a glance
Use these Newbury 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) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
Which extension suits a Newbury home?
In the South East, plenty of houses have already been extended once, which makes checking the remaining permitted development allowance an important early step.
Start by comparing orangery extensions, wraparound extensions and double-storey extensions: between them they cover most of the layouts we see requested for houses like these.
Covering Newbury and nearby
Our survey diary covers Newbury, including RG14, RG20. Neighbouring towns we cover include Thatcham (3 miles), Reading (16 miles), Earley (18 miles), Wokingham (21 miles), Crowthorne (23 miles). For homes towards Oxfordshire, Wantage is around 14 miles away.
Do extensions in Newbury need planning permission?
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 England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
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.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Every extension type in Newbury
- Timber frame extensions · from £23,500
- Orangery extensions · from £33,500
- Kitchen extensions · from £30,000
- Building regulations for extensions · from £1,000
- Side extensions · from £24,500
- Annexe extensions · from £61,500
- Single-storey rear extensions · from £23,500
- Bungalow extensions · from £29,000
- Side return extensions · from £20,000
- Bedroom extensions · from £29,000
- Wraparound extensions · from £40,000
- Pitched roof extensions · from £24,500
- Porch extensions · from £4,450
- Home office extensions · from £17,500
- Planning permission for extensions · from £350
- Conservatory replacement extensions · from £22,000
- Double-storey extensions · from £42,500
- Glass box extensions · from £33,500
- Extension plans and drawings · from £1,300
- Utility and boot room extensions · from £15,500
- Flat roof extensions · from £23,500
- Extensions over a garage · from £26,500
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Newbury
How much does an extension cost in Newbury?
Using our South East England factor (×1.12), a standard-spec single-storey extension of 20 m² is a guide £45,500 to £58,500 including VAT, and a 32 m² two-storey extension £64,500 to £84,500. Your written price follows the survey.
Do I need planning permission for an extension in Newbury?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
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 handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do you cover all of Newbury?
Yes, including the surrounding parts of Berkshire. Site visits are free and there is no obligation.
Book a free site visit in Newbury
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.