Canonbury, Greater London
Wraparound extension in Canonbury
An L-shaped extension that fills the side return and runs across the back. If you live in Canonbury 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.
We cover Canonbury (E8, N1 and N5) as part of our Greater London work. Wraparound projects around Canonbury 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 Canonbury?
A wraparound extension in Canonbury is priced at £2,860–£4,680 per square metre including VAT as a guide, before kitchen fit-out and fees. London prices sit at the top of our range because of labour rates, access through the house, parking suspensions and skip licences.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £63,000–£103,000 |
| L-shaped, about 30 m² of new floor | £86,000–£140,500 |
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 Canonbury?
The planning route for a wraparound extension in Canonbury is set by England's householder rules and your council.
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 Canonbury like to extend?
Much of Canonbury is Victorian and Edwardian terraced housing with narrow back additions, which suits side returns, wraparounds and 3 metre rear extensions. Many streets are in conservation areas, gardens are short, and almost everything comes through the house or along a rear alley.
How a wraparound extension in Canonbury 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.
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 Canonbury
Neighbouring places we cover include Highbury (0.6 miles) and Islington (0.7 miles).
- Wraparound extension in Highbury
- Wraparound extension in Islington
- Wraparound extension in Barnsbury
- Wraparound extension in Holloway
- Wraparound extension in Bethnal Green
Other work in Canonbury:
FAQ
Wraparound extension questions in Canonbury
Can you match the brick or stone on my Canonbury house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How much does a wraparound extension cost in Canonbury?
As a guide, £2,860–£4,680 per square metre including VAT for a standard specification. For example, L-shaped, about 22 m² of new floor: about £63,000–£103,000 at that rate. Your written price follows the survey.
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.
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.
Is the site visit in Canonbury free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Canonbury?
Including E8, N1 and N5, and the surrounding Greater London area.