Crofton Park, Greater London
Rear extension planning drawings in Crofton Park
Measured survey, design options, planning drawings and the application, handled for you. We design, get the approvals for and build rear extensions in Crofton Park and the surrounding area, with one contract from the first survey to building control sign-off.
Crofton Park sits in Greater London, with postcode districts including SE4, SE13 and SE23. 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 Crofton Park?
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 Crofton Park?
Here is how the rules in England apply to a rear extension in Crofton Park.
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. 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 Crofton Park like to extend?
Period terraces in Crofton Park sit alongside flats, and the difference matters: houses usually keep permitted development rights, while flats and maisonettes need planning permission for any rear extension.
How a rear extension in Crofton Park 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.
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 Crofton Park
From Crofton Park, the nearest places we also cover are Forest Hill (0.5 miles) and Ladywell (0.6 miles).
- Rear extension planning drawings in Forest Hill
- Rear extension planning drawings in Ladywell
- Rear extension planning drawings in Catford
- Rear extension planning drawings in Brockley
- Rear extension planning drawings in Perry Vale
Other work in Crofton Park:
FAQ
Rear extension planning drawings questions in Crofton Park
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.
Is the site visit in Crofton Park free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do neighbours get consulted?
Yes for a full application: the council writes to them or puts up a site notice.
What do rear extension planning drawings cost in Crofton Park?
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.
Do I need planning permission for a rear extension in Crofton Park?
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.
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.