Spennymoor, County Durham
Glazed rear extension in Spennymoor
For homes in Spennymoor, a glazed rear extension is often the simplest way to gain space without moving. Full-height glass, slim frames and big rooflights for the most open rear room. We take it from survey to completion certificate.
Spennymoor is covered from our County Durham round, including DL16. Glass-led rear extensions in Spennymoor 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 Spennymoor?
For Spennymoor we work from the North East England rate: £2,520–£4,320 per square metre of new floor, including VAT, standard specification. 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 Spennymoor?
Whether your glazed rear extension in Spennymoor needs a planning application depends on its size, your house and any local restrictions.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part 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 Spennymoor like to extend?
Terraces and semis are typical around Spennymoor. 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 Spennymoor 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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 Spennymoor
We also build glazed and glass-box rear extensions in nearby Bishop Auckland (4.2 miles) and Durham (5.5 miles).
- Glazed rear extension in Bishop Auckland
- Glazed rear extension in Durham
- Glazed rear extension in Newton Aycliffe
- Glazed rear extension in Hetton-le-Hole
- Glazed rear extension in Chester-le-Street
Other work in Spennymoor:
FAQ
Glazed rear extension questions in Spennymoor
Can you match the brick or stone on my Spennymoor house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do you handle building control in Spennymoor?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Will a glass extension be too hot?
Not if it is designed for its orientation, with solar-control glass, shading and ventilation.
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 Spennymoor?
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.
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.