Swansea, Swansea Bay
Glazed rear extension in Swansea
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 Swansea and the surrounding area, with one contract from the first survey to building control sign-off.
Swansea and its postcode districts SA2, SA3, SA4 and SA5 are part of our Swansea Bay coverage. Glass-led rear extensions in Swansea 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 Swansea?
For Swansea 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 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a glazed rear extension in Swansea?
The planning route for a glazed rear extension in Swansea 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. 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 Swansea like to extend?
Older terraces near the centre and post-war semis further out are typical of Swansea. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a glazed rear extension in Swansea 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.
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 Swansea
Close by, we work in Clydach, about 4.7 miles away, and Briton Ferry, about 5.4 miles away.
- Glazed rear extension in Clydach
- Glazed rear extension in Briton Ferry
- Glazed rear extension in Gorseinon
- Glazed rear extension in Neath
- Glazed rear extension in Llanelli
Other work in Swansea:
FAQ
Glazed rear extension questions in Swansea
How much does a glazed rear extension cost in Swansea?
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.
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.
Will a glass extension be too hot?
Not if it is designed for its orientation, with solar-control glass, shading and ventilation.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Do you handle building control in Swansea?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.
What postcode areas do you cover around Swansea?
Including SA2, SA3, SA4, SA5, SA6 and SA7, and the surrounding Swansea Bay area.