Seven Sisters, Greater London
Glazed rear extension in Seven Sisters
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 Seven Sisters and the surrounding area, with one contract from the first survey to building control sign-off.
Seven Sisters and its postcode districts N4, N15 and N16 are part of our Greater London coverage. 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 Seven Sisters?
Guide prices for a glazed rear extension in Seven Sisters start from our London rate of £3,640–£6,240 per square metre, including VAT. London prices sit at the top of our range because of labour rates, access through the house, parking suspensions and skip licences.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £43,500–£75,000 |
| 4 m wide × 6 m deep (24 m²) | £87,500–£150,000 |
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 Seven Sisters?
Whether your glazed rear extension in Seven Sisters needs a planning application depends on its size, your house and any local restrictions.
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. 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 Seven Sisters like to extend?
Much of Seven Sisters is Victorian and Edwardian terraced housing with narrow back additions, which suits side returns, wraparounds and 3 metre rear extensions. Many streets are in conservation areas, gardens are short, and almost everything comes through the house or along a rear alley.
How a glazed rear extension in Seven Sisters 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.
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 Seven Sisters
From Seven Sisters, the nearest places we also cover are St Ann's (0.6 miles) and Stamford Hill (0.7 miles).
- Glazed rear extension in St Ann's
- Glazed rear extension in Stamford Hill
- Glazed rear extension in Harringay
- Glazed rear extension in Stroud Green
- Glazed rear extension in Tottenham Hale
Other work in Seven Sisters:
FAQ
Glazed rear extension questions in Seven Sisters
Do you handle building control in Seven Sisters?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How much does a glazed rear extension cost in Seven Sisters?
As a guide, £3,640–£6,240 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £43,500–£75,000 at that rate. Your written price follows the survey.
Can I have a level threshold?
Yes, with a drainage channel outside the doors and the slab set to the patio level.
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.
What postcode areas do you cover around Seven Sisters?
Including N4, N15 and N16, and the surrounding Greater London area.
Can you match the brick or stone on my Seven Sisters house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.