Enfield Lock, Hertfordshire
Glazed rear extension in Enfield Lock
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Enfield Lock 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 Enfield Lock (EN1, EN2 and EN3) as part of our Hertfordshire work. If your garden in Enfield Lock faces south, expect us to talk about overhangs and solar-control glass before frame colours.
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 Enfield Lock?
Guide prices for a glazed rear extension in Enfield Lock start from our East of England rate of £2,970–£5,090 per square metre, including VAT. East of England prices run slightly above our West Midlands baseline; clay soils near trees are the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £35,500–£61,000 |
| 4 m wide × 6 m deep (24 m²) | £71,000–£122,000 |
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 Enfield Lock?
Here is how the rules in England apply to a glazed rear extension in Enfield Lock.
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 Enfield Lock like to extend?
Enfield Lock mixes Victorian terraces with 1930s semis, so both side returns and full-width kitchen extensions suit houses here.
How a glazed rear extension in Enfield Lock 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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 Enfield Lock
From Enfield Lock, the nearest places we also cover are Waltham Cross (1.1 miles) and Waltham Abbey (1.5 miles).
- Glazed rear extension in Waltham Cross
- Glazed rear extension in Waltham Abbey
- Glazed rear extension in Ponders End
- Glazed rear extension in Cheshunt
- Glazed rear extension in Enfield Town
Other work in Enfield Lock:
FAQ
Glazed rear extension questions in Enfield Lock
How much does a glazed rear extension cost in Enfield Lock?
As a guide, £2,970–£5,090 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £35,500–£61,000 at that rate. Your written price follows the survey.
How long does a rear extension take to build in Enfield Lock?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Sliding or bifold doors?
Sliders give bigger panes and slimmer sightlines; bifolds open the whole width. Our guide compares them.
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.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Can you match the brick or stone on my Enfield Lock house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.