Chertsey, Surrey
Rear extension planning drawings in Chertsey
Thinking about a rear extension in Chertsey? Measured survey, design options, planning drawings and the application, handled for you. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Chertsey is covered from our Surrey round, including KT15, KT16 and TW17. Rear extension applications in Surrey 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 Chertsey?
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. Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a rear extension in Chertsey?
The planning route for a rear extension in Chertsey is set by England's householder rules and your council.
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 Chertsey like to extend?
Commuter semis and detached houses make up much of Chertsey, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a rear extension in Chertsey comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Rear extension planning drawings near Chertsey
We also build rear extensions in nearby Addlestone (1.3 miles) and Weybridge (2.4 miles).
- Rear extension planning drawings in Addlestone
- Rear extension planning drawings in Weybridge
- Rear extension planning drawings in Shepperton
- Rear extension planning drawings in Staines
- Rear extension planning drawings in Egham
Other work in Chertsey:
FAQ
Rear extension planning drawings questions in Chertsey
Is the site visit in Chertsey free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What do rear extension planning drawings cost in Chertsey?
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.
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.
Do I need planning permission for a rear extension in Chertsey?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
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.