Knutsford, Cheshire
Rear extension planning drawings in Knutsford
Measured survey, design options, planning drawings and the application, handled for you. We design, get the approvals for and build rear extensions in Knutsford and the surrounding area, with one contract from the first survey to building control sign-off.
Knutsford and its postcode districts WA16 are part of our Cheshire coverage. Planning applications in Knutsford go to the local planning authority covering Knutsford, and we check its local design guidance for rear extensions before drawing.
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 Knutsford?
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 Knutsford?
Planning for a rear extension in Knutsford follows the English householder rules.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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 Knutsford like to extend?
Knutsford 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 rear extension in Knutsford 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Rear extension planning drawings near Knutsford
We also build rear extensions in nearby Hale (5.5 miles) and Altrincham (5.9 miles).
- Rear extension planning drawings in Hale
- Rear extension planning drawings in Altrincham
- Rear extension planning drawings in Wilmslow
- Rear extension planning drawings in Northwich
- Rear extension planning drawings in Lymm
Other work in Knutsford:
FAQ
Rear extension planning drawings questions in Knutsford
Is the site visit in Knutsford free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Knutsford house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What if planning is refused?
We review the reasons with you, amend and resubmit (often free of a second fee within 12 months in England) or appeal.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
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.
Do I need planning permission for a rear extension in Knutsford?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.