Biggin Hill, Kent
Wraparound extension in Biggin Hill
An L-shaped extension that fills the side return and runs across the back. We design, get the approvals for and build wraparound extensions in Biggin Hill and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Biggin Hill (TN16) as part of our Kent work. Wraparounds are the natural next step for the end-of-terrace and Victorian houses in Kent where a side return alone would leave the room too narrow.
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 wraparound extension cost in Biggin Hill?
Guide prices for a wraparound extension in Biggin Hill start from our South East England rate of £2,460–£4,030 per square metre, including VAT. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £54,000–£88,500 |
| L-shaped, about 30 m² of new floor | £74,000–£121,000 |
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 wraparound extension in Biggin Hill?
Here is how the rules in England apply to a wraparound extension in Biggin Hill.
In England the side part of a side return or wraparound must meet the side-extension rules (one storey, under 4 metres high, no more than half the width of the original house), and those rights do not apply on designated land. Because a wraparound combines a side and a rear extension, many need householder planning permission.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
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?
Around Biggin 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 wraparound extension in Biggin 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.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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.
Wraparound extensions near Biggin Hill
Close by, we work in Oxted, about 4.3 miles away, and West Wickham, about 4.3 miles away.
- Wraparound extension in Oxted
- Wraparound extension in West Wickham
- Wraparound extension in Orpington
- Wraparound extension in Chelsfield
- Wraparound extension in Sanderstead
Other work in Biggin Hill:
FAQ
Wraparound extension questions in Biggin Hill
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 it take a lot of garden?
Less than a deep rear extension of the same area, because part of the space comes from the side passage.
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.
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 I need planning permission for a rear extension in Biggin 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.