Horsforth, West Yorkshire
Glazed rear extension in Horsforth
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Horsforth 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.
We cover Horsforth (LS16, LS18 and LS19) as part of our West Yorkshire work. 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 Horsforth?
Guide prices for a glazed rear extension in Horsforth start from our Yorkshire and the Humber rate of £2,600–£4,460 per square metre, including VAT. Yorkshire prices sit below our West Midlands baseline; matching natural stone is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £31,000–£53,500 |
| 4 m wide × 6 m deep (24 m²) | £62,500–£107,000 |
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 Horsforth?
Planning for a glazed rear extension in Horsforth follows the English householder rules.
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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Horsforth like to extend?
Horsforth has through terraces and some back-to-backs as well as later semis; back-to-backs have little or no rear space, so we look at side or loft options there.
How a glazed rear extension in Horsforth 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.
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 Horsforth
We also build glazed and glass-box rear extensions in nearby Yeadon (2.5 miles) and Pudsey (3.4 miles).
- Glazed rear extension in Yeadon
- Glazed rear extension in Pudsey
- Glazed rear extension in Guiseley
- Glazed rear extension in Chapel Allerton
- Glazed rear extension in Leeds
Other work in Horsforth:
FAQ
Glazed rear extension questions in Horsforth
What postcode areas do you cover around Horsforth?
Including LS16, LS18 and LS19, and the surrounding West Yorkshire area.
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.
Does glass need planning permission?
The same rules apply as any rear extension; glass does not change the depth or height limits.
Is the site visit in Horsforth free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Horsforth house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
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.