Sutton, Greater London
Rear extension planning drawings in Sutton
Measured survey, design options, planning drawings and the application, handled for you. We design, get the approvals for and build rear extensions in Sutton and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Sutton (KT4, SM1, SM2 and SM3) as part of our Greater London work. Rear extension applications in Greater London 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 Sutton?
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. Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a rear extension in Sutton?
Planning for a rear extension in Sutton follows the English householder rules.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Sutton like to extend?
Sutton is mostly 1930s semis, short terraces and post-war houses, so full-width single-storey and two-storey rear extensions are realistic on many plots. Some later estates had permitted development rights removed by condition, so we check the planning history first.
How a rear extension in Sutton comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Rear extension planning drawings near Sutton
Close by, we work in Belmont, about 0.5 miles away, and Cheam, about 1.2 miles away.
- Rear extension planning drawings in Belmont
- Rear extension planning drawings in Cheam
- Rear extension planning drawings in Carshalton
- Rear extension planning drawings in Banstead
- Rear extension planning drawings in Ewell
Other work in Sutton:
FAQ
Rear extension planning drawings questions in Sutton
Do I need planning permission for a rear extension in Sutton?
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.
Do neighbours get consulted?
Yes for a full application: the council writes to them or puts up a site notice.
Can you match the brick or stone on my Sutton house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How long does a rear extension take to build in Sutton?
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 you handle building control in Sutton?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.