Shops, homes to supplant winery.

Byline: Joseph Ascenzi

Jul. 3--The Ontario property known as Guasti Winery is on the verge of a major upgrade.

San Diego developer OliverMcMillan bought the 49-acre property and wants to bring two or three hotels, restaurants, specialty retail tenants and multifamily homes to the site on Old Guasti Road north of Ontario International Airport.

The development will include about 600,000 square feet of office space, 250,000 square feet of retail and 300 to 400 housing units, either apartments or condominiums.

CB Richard Ellis Ontario will market the million-square-foot project and the brokerage is putting together a team, said Scott Kaplan, senior managing director …