Royal Leamington Spa, Warwickshire
Glazed rear extension in Royal Leamington Spa
We plan and build glazed and glass-box rear extensions for homeowners in Royal Leamington Spa. Full-height glass, slim frames and big rooflights for the most open rear room. Start with a free site visit, then a written price once the design is agreed.
Royal Leamington Spa is covered from our Warwickshire round, including CV31, CV32 and CV33. 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 Royal Leamington Spa?
For Royal Leamington Spa we work from the West Midlands rate: £2,800–£4,800 per square metre of new floor, including VAT, standard specification. The West Midlands is the baseline for our guide prices.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £33,500–£57,500 |
| 4 m wide × 6 m deep (24 m²) | £67,000–£115,000 |
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 Royal Leamington Spa?
The planning route for a glazed rear extension in Royal Leamington Spa is set by England's householder rules and your council.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it 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. 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 Royal Leamington Spa like to extend?
Red-brick terraces and 1930s semis make up much of Royal Leamington Spa. Many already have a small kitchen lean-to at the back, which a new rear extension usually replaces rather than adds to.
How a glazed rear extension in Royal Leamington Spa 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.
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 Royal Leamington Spa
Neighbouring places we cover include Warwick (2.7 miles) and Kenilworth (5.2 miles).
- Glazed rear extension in Warwick
- Glazed rear extension in Kenilworth
- Glazed rear extension in Coventry
- Glazed rear extension in Stratford-upon-Avon
- Glazed rear extension in Knowle
Other work in Royal Leamington Spa:
FAQ
Glazed rear extension questions in Royal Leamington Spa
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.
What postcode areas do you cover around Royal Leamington Spa?
Including CV31, CV32 and CV33, and the surrounding Warwickshire 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 a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
How long does a rear extension take to build in Royal Leamington Spa?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Is the site visit in Royal Leamington Spa free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.