Castle & Cooke Homes Hawaii Inc. officially started construction Friday on its $50 million, 400 Keawe mixed-use project in the Honolulu neighborhood of Kakaako, which includes 95 units and 10,000-square-feet of commercial space on the ground floor of a low-rise tower. Located on the corner of Keawe and Auahi streets on a 1.5-acre site, the six-story project will include 75 market-priced and 20 reserved housing units in one- to three-bedroom floor plans ranging from 581 square feet to 1,327 square feet.