City officials in Tustin are looking at building up.

They are considering more development density for multifamily buildings, which would mean rezoning certain areas to allow for taller structures that have shops and restaurants on the ground floor.

One area specifically targeted is the Red Hill Avenue corridor. Irvine Asset Group would like to build a 201-unit apartment building in the area that would consist of three- and four-story buildings, along with 10,000 square feet of retail.

The $60-million project would mean that the city would have to rezone the area for 60 units per square acre, upping the current 25-unit-per-square-acre regulation.