Knutsford, Cheshire
Glazed rear extension in Knutsford
Full-height glass, slim frames and big rooflights for the most open rear room. We design, get the approvals for and build glazed and glass-box rear extensions in Knutsford and the surrounding area, with one contract from the first survey to building control sign-off.
Knutsford sits in Cheshire, with postcode districts including WA16. If your garden in Knutsford faces south, expect us to talk about overhangs and solar-control glass before frame colours.
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 glazed rear extension cost in Knutsford?
Guide prices for a glazed rear extension in Knutsford start from our North West England rate of £2,630–£4,510 per square metre, including VAT. North West prices sit below our West Midlands baseline; access on terraced streets is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £31,500–£54,000 |
| 4 m wide × 6 m deep (24 m²) | £63,000–£108,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a glazed rear extension in Knutsford?
The planning route for a glazed rear extension in Knutsford is set by England's householder rules and your council.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is within 2 metres of a boundary.
New fabric must meet Approved Document L (2021 edition incorporating 2023 amendments): walls 0.18, roof 0.15 and floor 0.18 W/m²K, windows 1.4 W/m²K or Band B. Under the simple route, new windows, doors and rooflights should not exceed 25% of the extension floor area plus any openings removed; more glass is possible with a whole-house calculation.
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?
Stone and brick terraces are common around Knutsford. Where houses back onto a ginnel or alley, deliveries can come in from the rear, which makes the build tidier.
How a glazed 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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.
Glazed rear extensions near Knutsford
From Knutsford, the nearest places we also cover are Hale (5.5 miles) and Altrincham (5.9 miles).
- Glazed rear extension in Hale
- Glazed rear extension in Altrincham
- Glazed rear extension in Wilmslow
- Glazed rear extension in Northwich
- Glazed rear extension in Lymm
Other work in Knutsford:
FAQ
Glazed rear extension questions in Knutsford
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.
How much does a glazed rear extension cost in Knutsford?
As a guide, £2,630–£4,510 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £31,500–£54,000 at that rate. Your written price follows the survey.
Does glass need planning permission?
The same rules apply as any rear extension; glass does not change the depth or height limits.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
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 Knutsford free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.