Nonprofit People Inc. and developers Nick Sinatra and David Pawlik on Wednesday formally kicked off construction on their $31 million project to create affordable and supportive housing on the East Side, with local, state and federal politicians touting the venture as a significant piece of the area’s revitalization.

The proposed Jefferson Avenue Apartments will consist of two three-story buildings at 1140 and 1166 Jefferson, with 89 affordable apartments, of which 16 will be reserved for individuals with intellectual or developmental disabilities. The buildings will include a mix of 71 one- and 19 two-bedroom apartments, a community room with a small kitchen, on-site laundry, balconies for all apartments, a playground, green space and courtyards, and off-street parking. People Inc. will provide support services for tenants who need them.