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Roxbury E+ comprises four townhomes, each topped with 39 solar panels that can produce more energy—close to 10,000 kilowatts a year—than the homeowners are likely to need. The homes are also designed with passive solar principles to minimize energy consumption. High-efficiency windows, double insulation, and Energy Star-rated appliances also reduce the building’s reliance on electricity. Homeowners can sell surplus power back to the city grid.

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The three-story townhouses’ smart and contemporary facade are clad in metal and timber panels. Each house includes three bedrooms, 2 1/2 baths, generous backyards, and third-level terraces. The development was completed in 2013; the market-rate units sold for $550,000, while the affordable housing unit sold for $215,000. The site surrounding the townhouse includes rain gardens and permeable paving.

+ Interface Studio Architects

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Images via Interface Studio Architects