Bletchley, Buckinghamshire
Glazed rear extension in Bletchley
We plan and build glazed and glass-box rear extensions for homeowners in Bletchley. 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.
Bletchley sits in Buckinghamshire, with postcode districts including MK1, MK2 and MK3. 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 Bletchley?
Guide prices for a glazed rear extension in Bletchley start from our South East England rate of £3,140–£5,380 per square metre, including VAT. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £37,500–£64,500 |
| 4 m wide × 6 m deep (24 m²) | £75,500–£129,000 |
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 Bletchley?
Here is how the rules in England apply to a glazed rear extension in Bletchley.
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. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Bletchley like to extend?
Bletchley has a mix of Victorian terraces near the centre and larger Edwardian and inter-war houses further out. Clay soils across much of the South East mean deeper foundations near trees, which we plan for at the survey.
How a glazed rear extension in Bletchley 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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 Bletchley
We also build glazed and glass-box rear extensions in nearby Milton Keynes (3.5 miles) and Leighton Buzzard (6.2 miles).
- Glazed rear extension in Milton Keynes
- Glazed rear extension in Leighton Buzzard
- Glazed rear extension in Newport Pagnell
- Glazed rear extension in Flitwick
- Glazed rear extension in Ampthill
Other work in Bletchley:
FAQ
Glazed rear extension questions in Bletchley
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.
What postcode areas do you cover around Bletchley?
Including MK1, MK2 and MK3, and the surrounding Buckinghamshire area.
Can I have a level threshold?
Yes, with a drainage channel outside the doors and the slab set to the patio level.
Do you handle building control in Bletchley?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Is the site visit in Bletchley free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.