Chepstow, Newport and Monmouthshire
Glazed rear extension in Chepstow
Glazed rear extension in Chepstow: 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.
We cover Chepstow (NP16) as part of our Newport and Monmouthshire work. A wide sliding door with one long rooflight, rather than a fully glazed roof, keeps a glass-led extension usable in summer.
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 Chepstow?
For Chepstow we work from the Wales rate: £2,600–£4,460 per square metre of new floor, including VAT, standard specification. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £31,000–£53,500 |
| 4 m wide × 6 m deep (24 m²) | £62,500–£107,000 |
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 Chepstow?
The planning route for a glazed rear extension in Chepstow is set by Wales's householder rules and your council.
The Welsh Government's householder rules let many homes add a single-storey rear extension up to 4 metres deep and 4 metres high without a planning application. Deeper projects go through a householder application, because Wales has no prior approval route.
Wales has its own Approved Document L, with targets for walls, roofs, floors and glazing similar to but not identical with England's. Heavily glazed designs are checked with a calculation.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development or a householder planning application.
What are homes in Chepstow like to extend?
Older terraces near the centre and post-war semis further out are typical of Chepstow. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a glazed rear extension in Chepstow 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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 Chepstow
Neighbouring places we cover include Caldicot (5.1 miles) and Thornbury (7.1 miles).
- Glazed rear extension in Caldicot
- Glazed rear extension in Thornbury
- Glazed rear extension in Stoke Gifford
- Glazed rear extension in Portishead
- Glazed rear extension in Monmouth
Other work in Chepstow:
FAQ
Glazed rear extension questions in Chepstow
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
How much does a glazed rear extension cost in Chepstow?
As a guide, £2,600–£4,460 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £31,000–£53,500 at that rate. Your written price follows the survey.
Will a glass extension be too hot?
Not if it is designed for its orientation, with solar-control glass, shading and ventilation.
Is the site visit in Chepstow free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Chepstow?
Including NP16, and the surrounding Newport and Monmouthshire area.
How long does a rear extension take to build in Chepstow?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.