Middlesbrough, North Yorkshire
Glazed rear extension in Middlesbrough
We plan and build glazed and glass-box rear extensions for homeowners in Middlesbrough. 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.
We cover Middlesbrough (TS1, TS2, TS3 and TS4) as part of our North Yorkshire work. Glass-led rear extensions in Middlesbrough 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 Middlesbrough?
A glazed rear extension in Middlesbrough 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 |
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 Middlesbrough?
The planning route for a glazed rear extension in Middlesbrough is set by England's householder rules and your council.
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 Middlesbrough like to extend?
Brick terraces, colliery houses and post-war semis make up much of Middlesbrough. Former mining areas often need a coal mining risk check before foundations are designed.
How a glazed rear extension in Middlesbrough 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.
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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Glazed rear extensions near Middlesbrough
We also build glazed and glass-box rear extensions in nearby Billingham (2.4 miles) and Stockton-on-Tees (3.4 miles).
- Glazed rear extension in Billingham
- Glazed rear extension in Stockton-on-Tees
- Glazed rear extension in Thornaby-on-Tees
- Glazed rear extension in Ingleby Barwick
- Glazed rear extension in Yarm
Other work in Middlesbrough:
FAQ
Glazed rear extension questions in Middlesbrough
Do you handle building control in Middlesbrough?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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.
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.
Can you match the brick or stone on my Middlesbrough house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How long does a rear extension take to build in Middlesbrough?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
How much does a glazed rear extension cost in Middlesbrough?
As a guide, £2,520–£4,320 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £30,000–£52,000 at that rate. Your written price follows the survey.