Berwick-upon-Tweed, Northumberland
Glazed rear extension in Berwick-upon-Tweed
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Berwick-upon-Tweed 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.
Berwick-upon-Tweed is covered from our Northumberland round, including TD15. Glass-led rear extensions in Berwick-upon-Tweed 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 Berwick-upon-Tweed?
A glazed rear extension in Berwick-upon-Tweed is priced at £2,520–£4,320 per square metre including VAT as a guide, before kitchen fit-out and fees. North East prices are among the lowest in our range; former mining ground is the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £30,000–£52,000 |
| 4 m wide × 6 m deep (24 m²) | £60,500–£103,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a glazed rear extension in Berwick-upon-Tweed?
The planning route for a glazed rear extension in Berwick-upon-Tweed 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. 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 Berwick-upon-Tweed like to extend?
Terraces and semis are typical around Berwick-upon-Tweed. On terraces a single-storey rear extension across the back yard is usually the practical choice; semis often have room for more.
How a glazed rear extension in Berwick-upon-Tweed 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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 Berwick-upon-Tweed
Close by, we work in Kelso, about 20.4 miles away, and Dunbar, about 25.4 miles away.
- Glazed rear extension in Kelso
- Glazed rear extension in Dunbar
- Glazed rear extension in Galashiels
- Glazed rear extension in Selkirk
- Glazed rear extension in Tranent
Other work in Berwick-upon-Tweed:
FAQ
Glazed rear extension questions in Berwick-upon-Tweed
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.
Is the site visit in Berwick-upon-Tweed free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Will a glass extension be too hot?
Not if it is designed for its orientation, with solar-control glass, shading and ventilation.
How long does a rear extension take to build in Berwick-upon-Tweed?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.
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.