To say no to a loft conversion?

[Pud2]

This post is running alongside my other post on wooden floors!

The flat above me is for sale. The buyers want to convert the loft for habitation. The house is a Victorian terraced house with two converted flats. I'm on the ground floor but we have shared freehold and shared ownership of the roof. There would only be a Velux window at the front and a small dormer at the back.

Just wondered if there's any reason to say no other than the pain of the building work which wouldn't be good enough reason?

Unfortunately the buildings policy doesn't include legal advice.

Ok so the loft space is demised to them - in that case there is probably a clause about not withholding consent unreasonably.

If the loft space IS demised to the upstairs flat then I woudl agree to the loft extension but I wouldn't agree to any access to my garden or flat and I would renegotiate all the splits of costs based on the new sq footage.

You don't need to agree access - the law says access is only needed or enforced for essential maintenance which doesn't include improvements.

I don't really see why most people on this thread are so against this. Yes the noise while it is being built is annoying. The scaffolding having to go through your house would be a massive pain in the ass but you could ask for some money for the inconvenience. Yes things would need to be amended eg building insurance proportions and you need to discuss it all with a solicitor. We used to live in a London basement flat and our upstairs neighbour's added on a roof terrace and did some other bits and bobs. It meant the scaffolding being in our garden (not a shared one) and some other slightly annoying things, but I wouldn't have said no, unless the neighbour was an arse. Whilst he had the scaffolding up he did some communal roof repairs as a good will gesture. I know it's a bit different as you don't know these people, maybe ask to meet them? If it's a developer I could understand the reluctance.