House extension in Harrow. £1,650 fixed.
Plans, building regs and structural calcs for your single-storey extension, with drainage and foundation design included.
Lowest price in London.
House extension drawings for Harrow homes.
Harrow's 1930s semis and detached houses, from Pinner to Stanmore, are some of the easiest in London to extend, with generous plots and roof space.
We cover Pinner, Stanmore, Wealdstone and the rest of Harrow, with the same fixed £1,650 price wherever you are in the borough.
One fixed price, the whole pack.
Fixed price does not include the £199 application management fee. Larger or non-standard projects are priced individually after the site visit.
Do you need planning permission?
Single-storey rear extensions up to the standard size limits usually go under permitted development. Side and wrap-around extensions, conservation areas and flats are different, and where a planning application is required we manage and submit it for you.
Much of Harrow is suburban with strong permitted-development potential, apart from conservation areas around Pinner and Harrow on the Hill. We confirm your street before you commit.
We confirm exactly which applies to your address before you commit to anything. No guesswork, no surprises.
From postcode to build-ready.
Tell us your postcode
Drop your postcode and project into the quote form. You get your fixed price on screen in about 30 seconds, no quote-after-a-call.
We survey and draw
A qualified designer visits, measures up, and produces your full drawing pack and structural calcs. 14 working days as standard.
Submitted and ready to build
You get the building regs pack for Building Control, and where a planning application is needed we manage and submit it for you.