Architect Jerry Walleck shows plans during a Chicago Plan Commission hearing for the 23-story senior apartment building planned at 4030 N. Marine Dr.

One day after the City Council green-lit an initiative to spur denser housing construction near public transit lines, city planning officials pushed forward a massive North Side development they called a model of the plan’s principles — including for how to get hundreds of new apartments with relatively few parking spots past neighboring homeowners who would typically be opposed.