High Wycombe, Buckinghamshire
Bungalow rear extension in High Wycombe
Single-storey rear extensions that keep everything on one level. If you live in High Wycombe 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.
High Wycombe is covered from our Buckinghamshire round, including HP11, HP12 and HP13. 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 High Wycombe?
In High Wycombe, our guide for a bungalow rear extension is £2,070–£3,360 per square metre including VAT for a 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 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a bungalow rear extension in High Wycombe?
Whether your bungalow rear extension in High Wycombe needs a planning application depends on its size, your house and any local restrictions.
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.
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 High Wycombe like to extend?
Commuter semis and detached houses make up much of High Wycombe, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in High Wycombe comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
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 High Wycombe
We also build rear extensions for bungalows in nearby Marlow (4.3 miles) and Beaconsfield (4.5 miles).
- Bungalow rear extension in Marlow
- Bungalow rear extension in Beaconsfield
- Bungalow rear extension in Amersham
- Bungalow rear extension in Amersham on the Hill
- Bungalow rear extension in Burnham
Other work in High Wycombe:
FAQ
Bungalow rear extension questions in High Wycombe
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
How long does a rear extension take to build in High Wycombe?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Will the roof look odd?
Not if the pitch and tiles match. Where the eaves are low, a flat-roofed section with a lantern is an alternative.
Do you handle building control in High Wycombe?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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.
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.