Overhanging/overlooking window

Mistral001

This recent court judgement might be relevant.

https://www.thetimes.co.uk/article/glass-tower-residents-lose-legal-fight-over-tate-balcony-kmk82qmvz

Slinky

When we built our extension the planning stipulated that our side ensuite window needed to be opaque glass and non-opening so that we weren't overlooking the neighbour's garden. We have opening windows on the adjoining wall. I think that planning rules have been updated to stop the sorts of issues the OP has, but of course that doesn't stop the problem in older buildings.



We viewed a 1960s house a couple of years ago and it had similar landing to landing issues across the tops of the garages. I would have had to put up thick nets if we'd bought it.

robatwork

Could you replace the window with glass blocks? Obscure so you wouldn't see out or in but still get the light.

cranford

I have used Brocade from https://www.purlfrost.com who have a large choice. This lets in 90% of light but you may want to look for something a bit more opaque.
I found mine cheaper on Amazon/Ebay but I had to cut to size.h
Unless you have a very very tall neighbour you could leave a 20cm gap at the top which would let in quite a bit of light.