Amersham, Buckinghamshire
Glazed rear extension in Amersham
Glazed rear extension in Amersham: full-height glass, slim frames and big rooflights for the most open rear room. We measure the house, show you what the rules allow, price it in writing and build it.
Amersham and its postcode districts HP6 and HP7 are part of our Buckinghamshire coverage. If your garden in Amersham 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 Amersham?
A glazed rear extension in Amersham is priced at £3,140–£5,380 per square metre including VAT as a guide, before kitchen fit-out and fees. 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 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a glazed rear extension in Amersham?
The planning route for a glazed rear extension in Amersham 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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Amersham like to extend?
Commuter semis and detached houses make up much of Amersham, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a glazed rear extension in Amersham 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.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Glazed rear extensions near Amersham
From Amersham, the nearest places we also cover are Amersham on the Hill (0.7 miles) and Chesham (2.4 miles).
- Glazed rear extension in Amersham on the Hill
- Glazed rear extension in Chesham
- Glazed rear extension in Beaconsfield
- Glazed rear extension in Chorleywood
- Glazed rear extension in Chalfont St Peter
Other work in Amersham:
FAQ
Glazed rear extension questions in Amersham
Is the site visit in Amersham 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 Amersham house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Does glass need planning permission?
The same rules apply as any rear extension; glass does not change the depth or height limits.
What postcode areas do you cover around Amersham?
Including HP6 and HP7, and the surrounding Buckinghamshire area.
How long does a rear extension take to build in Amersham?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
How much does a glazed rear extension cost in Amersham?
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.