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Hillandale Gateway is a high performance, mixed-use development in Eastern Montgomery County, located immediately north of the Capital Beltway, west of New Hampshire Avenue, and adjacent to a planned Bus Rapid Transit station. As part of the newly adopted White Oak Science Gateway Master Plan, the Hillandale Gateway project is a vital part of the County’s vision.
Torti Gallas, with Nicholson Kovalchick Architects, worked with The Duffie Companies and The Housing Opportunities Commission of Montgomery County to create a vibrant, highly sustainable project that will help transform this area of Montgomery County.
The development consists of both affordable and market-rate dwelling units, located in an age-restricted, 10-story residential tower, and a mid-rise, 8-story apartment building. The podium, upon which both buildings sit, consists of ground level retail and residential amenities. There is a separate precast concrete parking structure that serves both buildings.
Both residential buildings are being designed to Passive House standards which will deliver a highly-sustainable building that is much more energy efficient than even LEED Platinum buildings. Passive House design emphasizes a high performance exterior wall, and thus a more efficient, smaller size mechanical system. The exterior wall construction consists of more robust continuous insulation that thermally breaks the structure from the environmental air, special detailing to eliminate thermal bridging for elements such as balconies, and extensive air sealing to deliver a “tight” building envelope. This, in turn, allows the mechanical system to be more efficient.
In addition, a solar array atop the larger footprint of the market-rate building is intended to provide renewable energy to the age-restricted building, such that it can become a Zero-Net Energy building – producing as much energy as it consumes.