Bargoed, South Wales Valleys
Glazed rear extension in Bargoed
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 Bargoed and the surrounding area, with one contract from the first survey to building control sign-off.
Bargoed sits in the South Wales Valleys, with postcode districts including CF81. Glass-led rear extensions in Bargoed are planned around which way the garden faces, because that decides the glass specification.
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 Bargoed?
A glazed rear extension in Bargoed is priced at £2,600–£4,460 per square metre including VAT as a guide, before kitchen fit-out and fees. 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 |
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 Bargoed?
The planning route for a glazed rear extension in Bargoed is set by Wales's householder rules and your council.
Welsh permitted development allows a single-storey rear extension of up to 4 metres in depth and 4 metres in height, subject to boundary and garden-coverage limits. There is no larger-extension prior approval scheme in Wales.
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. 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 Bargoed like to extend?
Bargoed is largely terraced streets on sloping ground, where back gardens step up or down from the house. Excavation, retaining walls and drainage are priced at the survey.
How a glazed rear extension in Bargoed 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Paperwork handled
Planning or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Glazed rear extensions near Bargoed
Neighbouring places we cover include Blackwood (1.5 miles) and Gelligaer (1.6 miles).
- Glazed rear extension in Blackwood
- Glazed rear extension in Gelligaer
- Glazed rear extension in Nelson
- Glazed rear extension in Treharris
- Glazed rear extension in Abercarn
Other work in Bargoed:
FAQ
Glazed rear extension questions in Bargoed
Do I need planning permission for a rear extension in Bargoed?
Often not for a single-storey rear extension of up to 4 metres under Welsh permitted development. Wales has no prior approval route for deeper extensions.
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.
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.
What postcode areas do you cover around Bargoed?
Including CF81, and the surrounding South Wales Valleys area.
Can you match the brick or stone on my Bargoed house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How much does a glazed rear extension cost in Bargoed?
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.