Amersham on the Hill, Buckinghamshire
Bungalow rear extension in Amersham on the Hill
Single-storey rear extensions that keep everything on one level. If you live in Amersham on the Hill and want to know what a bungalow rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Amersham on the Hill and its postcode districts HP5, HP6 and HP7 are part of our Buckinghamshire coverage. 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 Amersham on the Hill?
For Amersham on the Hill 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 Amersham on the Hill?
Whether your bungalow rear extension in Amersham on the Hill 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 Amersham on the Hill like to extend?
Around Amersham on the Hill the housing ranges from inter-war semis to 1960s and 1970s estates with good-sized gardens. Many of the newer estates had permitted development rights removed by condition, so we check the planning history before anything is drawn.
How a bungalow rear extension in Amersham on the Hill 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 Amersham on the Hill
Neighbouring places we cover include Amersham (0.7 miles) and Chesham (1.8 miles).
- Bungalow rear extension in Amersham
- Bungalow rear extension in Chesham
- Bungalow rear extension in Chorleywood
- Bungalow rear extension in Beaconsfield
- Bungalow rear extension in Chalfont St Peter
Other work in Amersham on the Hill:
FAQ
Bungalow rear extension questions in Amersham on the Hill
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.
Do you handle building control in Amersham on the Hill?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How deep can I extend?
The same limits as a house: 3 or 4 metres in England, more with prior approval.
Do I need planning permission for a rear extension in Amersham on the Hill?
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.
How long does a rear extension take to build in Amersham on the Hill?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Can you match the brick or stone on my Amersham on the Hill house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.