The Architectural Team (TAT) and Beacon Communities LLC have announced the completion of a ground-breaking new affordable housing building for seniors in South Boston. Known as Phase Three C of The Anne M. Lynch Homes at Old Colony, this 55-apartment midrise building stands out for its use of Passive House design principles. Constructed by Dimeo Construction, it is one of just a handful of affordable housing developments in the state built to the stringent, energy-saving standard better known for its use in high-end, single-family homes.