Biggin Hill, Kent
Bungalow rear extension in Biggin Hill
Bungalow rear extension in Biggin Hill: single-storey rear extensions that keep everything on one level. We measure the house, show you what the rules allow, price it in writing and build it.
We cover Biggin Hill (TN16) as part of our Kent work. For bungalows in Kent, 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 Biggin Hill?
A bungalow rear extension in Biggin Hill is priced at £2,070–£3,360 per square metre including VAT as a guide, before kitchen fit-out and fees. 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 Biggin Hill?
Planning for a bungalow rear extension in Biggin Hill follows the English householder rules.
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. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Biggin Hill like to extend?
Commuter semis and detached houses make up much of Biggin Hill, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in Biggin Hill comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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 Biggin Hill
Close by, we work in Oxted, about 4.3 miles away, and West Wickham, about 4.3 miles away.
- Bungalow rear extension in Oxted
- Bungalow rear extension in West Wickham
- Bungalow rear extension in Orpington
- Bungalow rear extension in Chelsfield
- Bungalow rear extension in Sanderstead
Other work in Biggin Hill:
FAQ
Bungalow rear extension questions in Biggin Hill
Can you match the brick or stone on my Biggin Hill 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 Biggin Hill?
Including TN16, and the surrounding Kent area.
Is a bungalow extension cheaper?
The rates are similar per square metre; roof work can add a little.
Is the site visit in Biggin Hill free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do you handle building control in Biggin Hill?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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.