Blackburn, Lancashire
Wraparound extension in Blackburn
Wraparound extension in Blackburn: an L-shaped extension that fills the side return and runs across the back. We measure the house, show you what the rules allow, price it in writing and build it.
Blackburn and its postcode districts BB1, BB2 and BB3 are part of our Lancashire coverage. Wraparound projects around Blackburn 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 Blackburn?
For Blackburn we work from the North West England rate: £2,070–£3,380 per square metre of new floor, including VAT, standard specification. North West prices sit below our West Midlands baseline; access on terraced streets is the main variable.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £45,500–£74,500 |
| L-shaped, about 30 m² of new floor | £62,000–£101,500 |
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 wraparound extension in Blackburn?
Here is how the rules in England apply to a wraparound extension in Blackburn.
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. 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 Blackburn like to extend?
Blackburn has long runs of terraced houses with back yards and alleys, plus 1930s semis further out. Yard extensions on terraces are often single-storey and close to both boundaries.
How a wraparound extension in Blackburn 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.
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.
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 Blackburn
Close by, we work in Darwen, about 3.7 miles away, and Great Harwood, about 3.9 miles away.
- Wraparound extension in Darwen
- Wraparound extension in Great Harwood
- Wraparound extension in Accrington
- Wraparound extension in Haslingden
- Wraparound extension in Padiham
Other work in Blackburn:
FAQ
Wraparound extension questions in Blackburn
What postcode areas do you cover around Blackburn?
Including BB1, BB2 and BB3, and the surrounding Lancashire area.
Is the site visit in Blackburn free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Is it worth it over a side return alone?
If you want a dining table and a sofa as well as the kitchen, usually yes.
How much does a wraparound extension cost in Blackburn?
As a guide, £2,070–£3,380 per square metre including VAT for a standard specification. For example, L-shaped, about 22 m² of new floor: about £45,500–£74,500 at that rate. Your written price follows the survey.
Can you match the brick or stone on my Blackburn house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
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.