Chippenham, Wiltshire
Glazed rear extension in Chippenham
For homes in Chippenham, a glazed rear extension is often the simplest way to gain space without moving. Full-height glass, slim frames and big rooflights for the most open rear room. We take it from survey to completion certificate.
Chippenham and its postcode districts SN14 and SN15 are part of our Wiltshire coverage. If your garden in Chippenham 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 Chippenham?
Guide prices for a glazed rear extension in Chippenham start from our South West England rate of £2,910–£4,990 per square metre, including VAT. South West prices run slightly above our West Midlands baseline; natural stone to match the house is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £35,000–£60,000 |
| 4 m wide × 6 m deep (24 m²) | £70,000–£120,000 |
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 Chippenham?
Here is how the rules in England apply to a glazed rear extension in Chippenham.
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 Chippenham like to extend?
Chippenham has Victorian terraces nearer the centre and post-war semis on the edges. Sloping gardens are frequent, which affects floor levels and steps down to the patio.
How a glazed rear extension in Chippenham comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
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.
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 Chippenham
Close by, we work in Corsham, about 3.1 miles away, and Neston, about 4.6 miles away.
- Glazed rear extension in Corsham
- Glazed rear extension in Neston
- Glazed rear extension in Calne
- Glazed rear extension in Melksham
- Glazed rear extension in Devizes
Other work in Chippenham:
FAQ
Glazed rear extension questions in Chippenham
How much does a glazed rear extension cost in Chippenham?
As a guide, £2,910–£4,990 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £35,000–£60,000 at that rate. Your written price follows the survey.
What postcode areas do you cover around Chippenham?
Including SN14 and SN15, and the surrounding Wiltshire area.
Is a glass box a conservatory?
No. It is built to Building Regulations as part of the house, with insulated floor and roof, so it is usable all year.
Do I need planning permission for a rear extension in Chippenham?
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.
Can you match the brick or stone on my Chippenham 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 Chippenham?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.