Wellingborough, Northamptonshire
Glazed rear extension in Wellingborough
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Wellingborough and want to know what a glazed rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Wellingborough is covered from our Northamptonshire round, including NN8. If your garden in Wellingborough faces south, expect us to talk about overhangs and solar-control glass before frame colours.
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 Wellingborough?
A glazed rear extension in Wellingborough is priced at £2,720–£4,660 per square metre including VAT as a guide, before kitchen fit-out and fees. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £32,500–£56,000 |
| 4 m wide × 6 m deep (24 m²) | £65,000–£111,500 |
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 Wellingborough?
Planning for a glazed rear extension in Wellingborough follows the English householder rules.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres 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 Wellingborough like to extend?
Red-brick terraces and semis are typical of Wellingborough. Coal-mining legacy areas in parts of the East Midlands can need a Coal Authority check before foundations are designed.
How a glazed rear extension in Wellingborough comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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 Wellingborough
We also build glazed and glass-box rear extensions in nearby Rushden (4.0 miles) and Kettering (6.7 miles).
- Glazed rear extension in Rushden
- Glazed rear extension in Kettering
- Glazed rear extension in Northampton
- Glazed rear extension in Desborough
- Glazed rear extension in Corby
Other work in Wellingborough:
FAQ
Glazed rear extension questions in Wellingborough
What postcode areas do you cover around Wellingborough?
Including NN8, and the surrounding Northamptonshire area.
How long does a rear extension take to build in Wellingborough?
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 there a limit on how much glass I can have?
In England the simple rule is 25% of the floor area plus openings removed; more is allowed with a calculation showing the house still meets Part L.
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.
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.
Do I need planning permission for a rear extension in Wellingborough?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.