Advice please...
I own a flat in an old religious building containing 10 similar flats. Recently, the developer has started work on developing an 11th flat in the basement, although he's had planning permission for ages. To do this he has had to cut the foundations and rest 70 tonnes of building on 2 RSJ's.
As a consequence of this work I now have cracks in my lounge walls, skirting boards and door frames. Pretty substantial 2mm wide. His structural engineer has been round and said "oh that's fine, I expected it to be a lot worse, cracks accross the ceiling etc."
I have consulted with a few people - our insurance company (not interested as his restoration work), a friend who's a surveyor (has recommended a structural engineer) and my solicitor (thinks I should be looking for compensation).
I have spoken with the developer and he assured me he will make good the damage.
My question is... is it worth getting an independent structural engineer to do a report? Am I likely to get much compensation for this? Am I within my rights to insist the developer pays for structural engineer?
I could do without pi55ing the developer off as he owns the building and you never know when you might need a favour, but at the same time I'm annoyed that no one told me to expect this to happen / inconvenience of having builders and decorators in etc.
Thoughts?
Thanks in advance.

