Gerrards Cross, Buckinghamshire
Bungalow rear extension in Gerrards Cross
For homes in Gerrards Cross, 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.
Gerrards Cross is covered from our Buckinghamshire round, including HP9, SL9 and UB9. For bungalows in Buckinghamshire, a rear extension is the usual way to add space without adding stairs.
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 Gerrards Cross?
For Gerrards Cross we work from the South East England rate: £2,070–£3,360 per square metre of new floor, including VAT, standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £25,000–£40,500 |
| 4 m wide × 6 m deep (24 m²) | £49,500–£80,500 |
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 Gerrards Cross?
Whether your bungalow rear extension in Gerrards Cross needs a planning application depends on its size, your house and any local restrictions.
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.
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. 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 Gerrards Cross like to extend?
Gerrards Cross has a mix of Victorian terraces near the centre and larger Edwardian and inter-war houses further out. Clay soils across much of the South East mean deeper foundations near trees, which we plan for at the survey.
How a bungalow rear extension in Gerrards 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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.
Bungalow rear extensions near Gerrards Cross
From Gerrards Cross, the nearest places we also cover are Chalfont St Peter (1.6 miles) and Uxbridge (4.1 miles).
- Bungalow rear extension in Chalfont St Peter
- Bungalow rear extension in Uxbridge
- Bungalow rear extension in Beaconsfield
- Bungalow rear extension in Rickmansworth
- Bungalow rear extension in Ickenham
Other work in Gerrards Cross:
FAQ
Bungalow rear extension questions in Gerrards Cross
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.
How long does a rear extension take to build in Gerrards 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.
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 Gerrards Cross?
Including HP9, SL9 and UB9, and the surrounding Buckinghamshire area.
Do I need planning permission for a rear extension in Gerrards 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.
Can you match the brick or stone on my Gerrards Cross house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.