Watertown planning officials have received site review applications from developers proposing two mixed-use condominium complexes that would add nearly 100 residential units to the town’s housing supply. Developers are hoping to build a 73-unit condo complex at 45 Bacon St., where Circle Supply Co. used to be, and a 24-unit complex at 33 Mount Auburn St., the site of the former Port Oil Corp. building, said Steve Magoon, Watertown’s planning director. Both complexes would feature mainly one- and two-bedroom units, but town officials have asked the developers to incorporate some three-bedroom units, Magoon said. Both developers also want to include commercial space, he said, but have not provided specifics yet. The site review submissions are the first step in the application process, Magoon said, and he expects the developers to contact neighborhood residents this summer to schedule preliminary community meetings. The Planning Board would schedule a hearing once the developers file formal applications, he said. Full story for BostonGlobe.com subscribers.