When Does a Side Window Become a Roof Window?

[JP_]

Building regs require that for a dormer roof extension with side windows that the windows do not open below 1.7m and have obscured glass. But, a roof window on the side can fully open and be clear.

Just saw this photo:


As it is a slope, does it count as a roof, or a wall? I guess there is a degrees cut-off? Seems like a good way to get a large clear opening window where one would not be allowed - the house I am looking at overlooks nothing on the side - the neighbour's house as no windows on the side, the house borders ours so they have no garden next to us, and they have already had their loft done (house was built as 3 stories), so no reason to add their own windows. Is this a solution?

edit - just found this: http://great-home.co.uk/a-guide-to-roof-construction/
looks like anything below 70 degrees is roof, and above is wall. So a 69 degree roof dormer could have clear opening side windows (subject to planning approval)?

 

[GeoffJ]

This web site appears to answer
https://www.sterlingbuild.co.uk/blog/planning-permission-to-install-roof-windows

The base needs to be at least 1.7m from the floor - or have obscure glazing

 

[freddiemercurystwin]

The rule is a Planning one, nothing to do with Building Regs. And it very much still counts when its in a roof slope. It's in black and white for you in the tech guidance. https://www.gov.uk/government/uploa...238/160413_Householder_Technical_Guidance.pdf page 36

 

[freddiemercurystwin]

And forget looking at any websites other than maybe the Planning portal. Many independent websites and even many Local Authority websites are often inaccurate or out of date.

 

[freddiemercurystwin]

That said you could always fit a normal window and hope the neighbours don't complain!

 

[JP_]

sounds a bit cheeky!

 

[freddiemercurystwin]

Dormer cheeky?

 

[jeds]

A couple of jobs I've been involved in the naughty builders fitted ordinary windows with obscure film on the glass. Then, a couple of months later, when the neighbours are no longer watching every move they make, they peel it off in the dead of night.

 

[Nakajo]

Outrageous! I've never heard of such a thing and I don't believe it!