Kensal Green, Greater London
Rear extension planning drawings in Kensal Green
Measured survey, design options, planning drawings and the application, handled for you. If you live in Kensal Green and want to know what a rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Kensal Green is covered from our Greater London round, including NW6, NW10 and W10. Rear extension applications in Greater London are householder applications, which councils aim to decide within about eight weeks.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
What do rear extension planning drawings cost in Kensal Green?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. A householder planning application in England costs £548 (£575 for applications made from 8 December 2026), and a lawful development certificate for proposed work costs half the householder fee. 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 rear extension in Kensal Green?
Planning for a rear extension in Kensal Green follows the English householder rules.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
Councils aim to decide householder applications within 8 weeks of validation, and prior approval within 42 days.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Kensal Green like to extend?
Period terraces in Kensal Green sit alongside flats, and the difference matters: houses usually keep permitted development rights, while flats and maisonettes need planning permission for any rear extension. Planning applications in Kensal Green go to the local planning authority covering Kensal Green, and we check its local design guidance for rear extensions before drawing.
How a rear extension in Kensal Green 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.
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.
Rear extension planning drawings near Kensal Green
We also build rear extensions in nearby Willesden (0.4 miles) and Queen's Park (0.7 miles).
- Rear extension planning drawings in Willesden
- Rear extension planning drawings in Queen's Park
- Rear extension planning drawings in Harlesden
- Rear extension planning drawings in Maida Hill
- Rear extension planning drawings in Notting Hill
Other work in Kensal Green:
FAQ
Rear extension planning drawings questions in Kensal Green
How long does a rear extension take to build in Kensal Green?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Do you handle building control in Kensal Green?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Do I need an architect?
You need accurate drawings by someone who knows householder planning; we provide them.
What postcode areas do you cover around Kensal Green?
Including NW6, NW10 and W10, and the surrounding Greater London area.
Can you match the brick or stone on my Kensal Green house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What do rear extension planning drawings cost in Kensal Green?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension and £2,000–£3,500 for a two-storey scheme, covering the measured survey, design options and the application. The council fee is extra.