Knowle, West Midlands
Wraparound extension in Knowle
We plan and build wraparound extensions for homeowners in Knowle. An L-shaped extension that fills the side return and runs across the back. Start with a free site visit, then a written price once the design is agreed.
Knowle is covered from our West Midlands round, including B40. Wraparound projects around Knowle often involve two neighbours, so we start the party wall conversations early.
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 Knowle?
Guide prices for a wraparound extension in Knowle start from our West Midlands rate of £2,200–£3,600 per square metre, including VAT. The West Midlands is the baseline for our guide prices.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £48,500–£79,000 |
| L-shaped, about 30 m² of new floor | £66,000–£108,000 |
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 wraparound extension in Knowle?
Here is how the rules in England apply to a wraparound extension in Knowle.
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. 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 Knowle like to extend?
Red-brick terraces and 1930s semis make up much of Knowle. Many already have a small kitchen lean-to at the back, which a new rear extension usually replaces rather than adds to.
How a wraparound extension in Knowle 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.
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.
Wraparound extensions near Knowle
From Knowle, the nearest places we also cover are Solihull (2.9 miles) and Shirley (4.1 miles).
- Wraparound extension in Solihull
- Wraparound extension in Shirley
- Wraparound extension in Acocks Green
- Wraparound extension in Chelmsley Wood
- Wraparound extension in Kenilworth
Other work in Knowle:
FAQ
Wraparound extension questions in Knowle
How long does a rear extension take to build in Knowle?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
What postcode areas do you cover around Knowle?
Including B40, and the surrounding West Midlands area.
What roof suits a wraparound?
A flat roof with a lantern, a standing-seam pitched roof or a glazed roof over the side leg. The choice usually follows the first-floor windows above.
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.
How much does a wraparound extension cost in Knowle?
As a guide, £2,200–£3,600 per square metre including VAT for a standard specification. For example, L-shaped, about 22 m² of new floor: about £48,500–£79,000 at that rate. Your written price follows the survey.
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.