CIT actually had this about 7-8 months ago. We called it "CITy". In my honest opinion, our interface was slightly more user friendly. Instead of clicking and then going to the selector on the same screen, we offered a list and your choice of furniture list would pop up on the right.
On top of that, players could even place walls and floors with a texture they picked themselves! Everything that was build was really unique. From offices to complete garages to even great Budhistic temples!
The best feature might've been "CITy doors". When players walked to it, it would open. But only for those who were allowed to come in.
Sadly, CITy was removed a few months ago since the amount of objects in a small area was just too high. It became quite laggy. Such a shame, really. It was my favourite thing. A piece of Sims on MTA!