Streatham, Greater London
Bungalow rear extension in Streatham
Single-storey rear extensions that keep everything on one level. We design, get the approvals for and build rear extensions for bungalows in Streatham and the surrounding area, with one contract from the first survey to building control sign-off.
Streatham is covered from our Greater London round, including SE27, SW12 and SW16. For Streatham 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 Streatham?
Guide prices for a bungalow rear extension in Streatham 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 |
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 bungalow rear extension in Streatham?
Whether your bungalow rear extension in Streatham needs a planning application depends on its size, your house and any local restrictions.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is within 2 metres of a boundary.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
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 Streatham like to extend?
Period terraces in Streatham 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 bungalow rear extension in Streatham 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.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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.
Bungalow rear extensions near Streatham
Neighbouring places we cover include Furzedown (0.7 miles) and Norbury (1.1 miles).
- Bungalow rear extension in Furzedown
- Bungalow rear extension in Norbury
- Bungalow rear extension in Tooting
- Bungalow rear extension in Brixton Hill
- Bungalow rear extension in Balham
Other work in Streatham:
FAQ
Bungalow rear extension questions in Streatham
Do you handle building control in Streatham?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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.
How deep can I extend?
The same limits as a house: 3 or 4 metres in England, more with prior approval.
What postcode areas do you cover around Streatham?
Including SE27, SW12 and SW16, and the surrounding Greater London area.
Can you match the brick or stone on my Streatham house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.