The widespread presence of sustainability features in affordable housing is finally underway thanks to changes in government regulations and financing incentives. Key green features are in high demand, forming a new standard in affordable housing. Affordable housing communities are becoming greener from the ground up, beginning with optimal placement: the north-south and east-west orientation of structures can help builders capitalize on passive solar energy or greater access to natural light, both of which can help tenants cut utility costs. Such passive solar housing units were recently added to Stoneham Barrier Free development in Massachusetts. By situating the buildings towards the sun, the units receive passive solar heating. During the summer, overhangs provide shading to keep units cooler. Clerestory windows channel natural light throughout the residences resulting in lower power bills for tenants. Developers are also taking advantage of smarter envelopes to create more efficient interiors. Since air leakage accounts for 25-40 percent of energy usage, constructing an airtight envelope promotes maximum indoor climate control and reduces energy waste. A tight envelope also helps to control moisture in living quarters and basements, minimizing the likelihood of mold, mildew, and moisture-related damages that carry significant costs for owners. What energy is needed to power affordable housing communities is furnished, at least in part, by renewable energy sources. Solar panels are more affordable and diverse than ever, coming in a variety of space-friendly styles to accommodate multifamily applications. Other innovative technologies, such as the use of algae and living concrete, offer properties a way to generate their own power and potentially sell power back to energy providers. “The Mennonite” is the nation’s first multi-family affordable passive house apartments, implementing an airtight envelope and on-site renewable energy sources. The $8.5 million structure will offer 24-units of green living for...