Coulsdon, Greater London
Bungalow rear extension in Coulsdon
Single-storey rear extensions that keep everything on one level. We design, get the approvals for and build rear extensions for bungalows in Coulsdon and the surrounding area, with one contract from the first survey to building control sign-off.
Coulsdon and its postcode districts CR5, CR8 and SM6 are part of our Greater London coverage. For Coulsdon bungalows we design the roof first, because the low eaves decide the height of the new room.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a bungalow rear extension cost in Coulsdon?
Guide prices for a bungalow rear extension in Coulsdon start from our London rate of £2,400–£3,900 per square metre, including VAT. London prices sit at the top of our range because of labour rates, access through the house, parking suspensions and skip licences.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £29,000–£47,000 |
| 4 m wide × 6 m deep (24 m²) | £57,500–£93,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a bungalow rear extension in Coulsdon?
Planning for a bungalow rear extension in Coulsdon follows the English householder rules.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
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 Coulsdon like to extend?
Coulsdon 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 bungalow rear extension in Coulsdon 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.
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.
Bungalow rear extensions near Coulsdon
Close by, we work in Purley, about 1.7 miles away, and Kenley, about 1.8 miles away.
- Bungalow rear extension in Purley
- Bungalow rear extension in Kenley
- Bungalow rear extension in Banstead
- Bungalow rear extension in Sanderstead
- Bungalow rear extension in Belmont
Other work in Coulsdon:
FAQ
Bungalow rear extension questions in Coulsdon
Do I need planning permission for a rear extension in Coulsdon?
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 postcode areas do you cover around Coulsdon?
Including CR5, CR8 and SM6, and the surrounding Greater London area.
How deep can I extend?
The same limits as a house: 3 or 4 metres in England, more with prior approval.
How long does a rear extension take to build in Coulsdon?
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 Coulsdon?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How much does a bungalow rear extension cost in Coulsdon?
As a guide, £2,400–£3,900 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £29,000–£47,000 at that rate. Your written price follows the survey.