Carterton, Oxfordshire
Rear extension planning drawings in Carterton
Measured survey, design options, planning drawings and the application, handled for you. We design, get the approvals for and build rear extensions in Carterton and the surrounding area, with one contract from the first survey to building control sign-off.
Carterton sits in Oxfordshire, with postcode districts including OX18. Rear extension applications in Oxfordshire are householder applications, which councils aim to decide within about eight weeks.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
What do rear extension planning drawings cost in Carterton?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. A householder planning application in England costs £548 (£575 for applications made from 8 December 2026), and a lawful development certificate for proposed work costs half the householder fee. We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a rear extension in Carterton?
Planning for a rear extension in Carterton follows the English householder rules.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
Councils aim to decide householder applications within 8 weeks of validation, and prior approval within 42 days.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Carterton like to extend?
Commuter semis and detached houses make up much of Carterton, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a rear extension in Carterton comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Rear extension planning drawings near Carterton
From Carterton, the nearest places we also cover are Witney (5.0 miles) and Kidlington (13.8 miles).
- Rear extension planning drawings in Witney
- Rear extension planning drawings in Kidlington
- Rear extension planning drawings in Wantage
- Rear extension planning drawings in Oxford
- Rear extension planning drawings in Abingdon
Other work in Carterton:
FAQ
Rear extension planning drawings questions in Carterton
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
What if planning is refused?
We review the reasons with you, amend and resubmit (often free of a second fee within 12 months in England) or appeal.
What do rear extension planning drawings cost in Carterton?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension and £2,000–£3,500 for a two-storey scheme, covering the measured survey, design options and the application. The council fee is extra.
How long does a rear extension take to build in Carterton?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.