Chelsfield, Kent
Wraparound extension in Chelsfield
An L-shaped extension that fills the side return and runs across the back. If you live in Chelsfield and want to know what a wraparound extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Chelsfield is covered from our Kent round, including BR5 and BR6. 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 Chelsfield?
In Chelsfield, our guide for a wraparound extension is £2,460–£4,030 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 |
|---|---|
| L-shaped, about 22 m² of new floor | £54,000–£88,500 |
| L-shaped, about 30 m² of new floor | £74,000–£121,000 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a wraparound extension in Chelsfield?
Whether your wraparound extension in Chelsfield needs a planning application depends on its size, your house and any local restrictions.
Side return infills and the side leg of a wraparound are treated as side extensions in England: single-storey, no more than 4 metres high and no wider than half the original house. They are not permitted development in conservation areas, National Parks or National Landscapes, and a joined wraparound often needs a planning application because the side and rear rules apply together.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
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 Chelsfield like to extend?
Around Chelsfield 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 Chelsfield 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.
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.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Wraparound extensions near Chelsfield
We also build wraparound extensions in nearby Orpington (1.7 miles) and Swanley (3.3 miles).
- Wraparound extension in Orpington
- Wraparound extension in Swanley
- Wraparound extension in Bickley
- Wraparound extension in Chislehurst
- Wraparound extension in Sidcup
Other work in Chelsfield:
FAQ
Wraparound extension questions in Chelsfield
Do you handle building control in Chelsfield?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How much does a wraparound extension cost in Chelsfield?
As a guide, £2,460–£4,030 per square metre including VAT for a standard specification. For example, L-shaped, about 22 m² of new floor: about £54,000–£88,500 at that rate. Your written price follows the survey.
Can the corner be all glass?
Yes, with a steel or aluminium post or a structural glass corner. It needs careful thermal detailing to meet Building Regulations.
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.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
How long does a rear extension take to build in Chelsfield?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.