Friern Barnet, Greater London
Bungalow rear extension in Friern Barnet
For homes in Friern Barnet, a bungalow rear extension is often the simplest way to gain space without moving. Single-storey rear extensions that keep everything on one level. We take it from survey to completion certificate.
Friern Barnet is covered from our Greater London round, including N11, N12 and N20. For Friern Barnet 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 Friern Barnet?
Guide prices for a bungalow rear extension in Friern Barnet 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 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a bungalow rear extension in Friern Barnet?
The planning route for a bungalow rear extension in Friern Barnet is set by England's householder rules and your council.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is 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. 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 Friern Barnet like to extend?
Period terraces in Friern Barnet 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 Friern Barnet 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.
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 Friern Barnet
From Friern Barnet, the nearest places we also cover are Muswell Hill (1.7 miles) and Finchley (1.8 miles).
- Bungalow rear extension in Muswell Hill
- Bungalow rear extension in Finchley
- Bungalow rear extension in Wood Green
- Bungalow rear extension in Palmers Green
- Bungalow rear extension in Totteridge
Other work in Friern Barnet:
FAQ
Bungalow rear extension questions in Friern Barnet
Can you match the brick or stone on my Friern Barnet house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What postcode areas do you cover around Friern Barnet?
Including N11, N12 and N20, 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 Friern Barnet?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
How much does a bungalow rear extension cost in Friern Barnet?
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.
Is the site visit in Friern Barnet free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.