Barnsbury, Greater London
Kitchen-diner rear extension in Barnsbury
We plan and build kitchen-diner rear extensions for homeowners in Barnsbury. An open-plan kitchen, dining and family room that opens straight onto the garden. Start with a free site visit, then a written price once the design is agreed.
We cover Barnsbury (N1C, N1 and N7) as part of our Greater London work. We usually keep the working kitchen where the old one was and put the dining table in the new space by the doors, which suits most Barnsbury homes.
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 kitchen-diner rear extension cost in Barnsbury?
Guide prices for a kitchen-diner rear extension in Barnsbury start from our London rate of £2,470–£4,030 per square metre, including VAT. 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 |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £29,500–£48,500 |
| 4 m wide × 5 m deep (20 m²) | £49,500–£80,500 |
| 4 m wide × 6 m deep (24 m²) | £59,500–£96,500 |
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 kitchen-diner rear extension in Barnsbury?
The planning route for a kitchen-diner rear extension in Barnsbury is set by England's householder rules and your council.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is within 2 metres of a boundary.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
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 Barnsbury like to extend?
Period terraces in Barnsbury sit alongside flats, and the difference matters: houses usually keep permitted development rights, while flats and maisonettes need planning permission for any rear extension.
How a kitchen-diner rear extension in Barnsbury 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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.
Kitchen-diner rear extensions near Barnsbury
Close by, we work in Islington, about 0.7 miles away, and Holloway, about 0.9 miles away.
- Kitchen-diner rear extension in Islington
- Kitchen-diner rear extension in Holloway
- Kitchen-diner rear extension in Highbury
- Kitchen-diner rear extension in Canonbury
- Kitchen-diner rear extension in Camden Town
Other work in Barnsbury:
FAQ
Kitchen-diner rear extension questions in Barnsbury
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 you match the brick or stone on my Barnsbury house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How big should a kitchen-diner be?
Around 25 to 35 m² for the combined kitchen, dining and seating areas suits most family homes. Your survey shows what fits the house.
Do you handle building control in Barnsbury?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Is the site visit in Barnsbury free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Barnsbury?
Including N1C, N1 and N7, and the surrounding Greater London area.