New Cross, Greater London
Rear extension planning drawings in New Cross
Rear extension planning drawings in New Cross: measured survey, design options, planning drawings and the application, handled for you. We measure the house, show you what the rules allow, price it in writing and build it.
New Cross and its postcode districts SE4, SE8 and SE14 are part of our Greater London coverage. Planning applications in New Cross go to the local planning authority covering New Cross, and we check its local design guidance for rear extensions before drawing.
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 New Cross?
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 New Cross?
The planning route for a rear extension in New Cross is set by England's householder rules and your council.
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. 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 New Cross like to extend?
Much of New Cross is Victorian and Edwardian terraced housing with narrow back additions, which suits side returns, wraparounds and 3 metre rear extensions. Many streets are in conservation areas, gardens are short, and almost everything comes through the house or along a rear alley.
How a rear extension in New Cross 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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 New Cross
Close by, we work in Brockley, about 0.8 miles away, and Greenwich, about 1.2 miles away.
- Rear extension planning drawings in Brockley
- Rear extension planning drawings in Greenwich
- Rear extension planning drawings in Peckham
- Rear extension planning drawings in Ladywell
- Rear extension planning drawings in Crofton Park
Other work in New Cross:
FAQ
Rear extension planning drawings questions in New Cross
Do I need planning permission for a rear extension in New Cross?
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.
What do rear extension planning drawings cost in New Cross?
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.
Are the drawings mine?
You can use them to get other quotes, subject to the terms.
How long does a rear extension take to build in New Cross?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Is the site visit in New Cross free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my New Cross house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.