Ascot, Berkshire
Glazed rear extension in Ascot
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Ascot and want to know what a glazed rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
We cover Ascot (SL5) as part of our Berkshire work. If your garden in Ascot 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 Ascot?
Guide prices for a glazed rear extension in Ascot start from our South East England rate of £3,140–£5,380 per square metre, including VAT. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £37,500–£64,500 |
| 4 m wide × 6 m deep (24 m²) | £75,500–£129,000 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a glazed rear extension in Ascot?
Planning for a glazed rear extension in Ascot follows the English householder rules.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres 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 Ascot like to extend?
Commuter semis and detached houses make up much of Ascot, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a glazed rear extension in Ascot 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.
Glazed rear extensions near Ascot
Neighbouring places we cover include Sunninghill (1.1 miles) and Bracknell (3.3 miles).
- Glazed rear extension in Sunninghill
- Glazed rear extension in Bracknell
- Glazed rear extension in Egham
- Glazed rear extension in Crowthorne
- Glazed rear extension in Camberley
Other work in Ascot:
FAQ
Glazed rear extension questions in Ascot
Can you match the brick or stone on my Ascot house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do you handle building control in Ascot?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Does glass need planning permission?
The same rules apply as any rear extension; glass does not change the depth or height limits.
How much does a glazed rear extension cost in Ascot?
As a guide, £3,140–£5,380 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £37,500–£64,500 at that rate. Your written price follows the 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.
How long does a rear extension take to build in Ascot?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.