Yes the tower is in great need, she had never been important work.
No, the crane is to renovate an old warehouse converted into luxury housing. The "MAD", and many clubs are behind some buildings in the picture.
A club existing to in the bel-air tower itself, that "the loft".
look here (the MAD and Bel-Air tower from Montbenon) :
http://www.panoramio.com/photo/53615297