This mixed-use project provides affordable housing for seniors in a new neighborhood adjacent to San Francisco's South of Market area. It is the first building in the country to allot a specific percentage of the residential units for seniors living with AIDS, says architect Tom Brutting. The vibrant building also houses a community center, retail space, a public library branch, and a day health center. This combination of spaces helps foster intergenerational interaction that has been shown to enhance seniors' lives.

See all 2007 Builder's Choice Award Winners

Category: Affordable housing;

Entrant/Architect: Hardison Komatsu Ivelich & Tucker, Oakland, Calif.;

Consulting architect: Santos Prescott and Associates, San Francisco;

Builder: Cahill Contractors, San Francisco;

Landscape architect: Antonia Bava Landscape Architects, San Francisco;

Interior designer: Marie Fisher Interior Design, San Francisco

Learn more about markets featured in this article: San Francisco, CA.