No hot water in my condo kitchen. It happened right after the water was shut off in the building and turned back on. Is it a part? Or something done in a unit above me?

More likely, it is debris caught up in the body of the faucet or at the shutoff under the sink. Whomever shut the water off needs to come back and clear the body of the faucet or the shutoff under the sink... should not be anything you have to do.

Back to you...

Mark

You report it and get the manager on it.