Local and state officials will join Mayor Joseph A. Curtatone and Congressman Michael Capuano Monday at 16 Butler Drive to celebrate the opening of 29 units of affordable housing at the Saint Polycarp Village
The apartments are the second of three phases of construction, and will be reserved for families who earn less than 60 percent of the area median income.
Five will be reserved for residents who earn significantly less, four for homeless families, and two for people with disabilities. The first phase, completed in 2009, opened 24 affordable units.
The 3.5-acre site was purchased by the Somerville Community Corporation in 2002 from the Archdioceses of Boston, and is the nonprofit's largest development. The third and final phase will add 31 affordable units, according to the SCC.