9/13/2013 12:40 AM PDT

Kim Kardashian & Kanye West -- UNDER CONSTRUCTION

Kim Kardashian and Kanye West's $11 million love shack is still under construction -- it has been for months -- and Thursday they put some pressure on the contractors ... by personally inspecting the quality of their work.

K&K dodged piles of scrap lumber and plywood as they did a walking tour of the 10,000-square-foot Italian-style villa in Bel Air, CA ... making sure the builders didn't leave out any details... like the bowling alley.  Or the hair salon.  Or the gym.  Or the baby's nursery.

Hopefully the walls of the house are really, really thick ... 'cuz Kanye likes to yell.  And everybody knows ... if the baby don't sleep ... nobody sleeps.