Chatham, Kent
Rear extension planning drawings in Chatham
Thinking about a rear extension in Chatham? 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.
Chatham is covered from our Kent round, including ME1, ME4 and ME7. Rear extension applications in Kent 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 Chatham?
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. These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a rear extension in Chatham?
Whether your rear extension in Chatham needs a planning application depends on its size, your house and any local restrictions.
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 Chatham like to extend?
Commuter semis and detached houses make up much of Chatham, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a rear extension in Chatham 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.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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 Chatham
Neighbouring places we cover include Rochester (1.1 miles) and Gillingham (1.1 miles).
- Rear extension planning drawings in Rochester
- Rear extension planning drawings in Gillingham
- Rear extension planning drawings in Strood
- Rear extension planning drawings in Snodland
- Rear extension planning drawings in Maidstone
Other work in Chatham:
FAQ
Rear extension planning drawings questions in Chatham
Can you match the brick or stone on my Chatham house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What postcode areas do you cover around Chatham?
Including ME1, ME4 and ME7, and the surrounding Kent area.
Are the drawings mine?
You can use them to get other quotes, subject to the terms.
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.
Is the site visit in Chatham free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How long does a rear extension take to build in Chatham?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.