The largest Passive House building in the world is set to welcome its first tenants this October in the historic River Market of downtown Kansas City, Missouri. The luxury apartment community — dubbed Second + Delaware — will offer high-end amenities alongside energy-efficient advantages with 80% to 90% energy savings compared to conventional buildings. Jointly developed by Arnold Development Group and Yarco Development, the apartment complex will offer 276 apartment residences including studios, one-bedroom units and two-bedroom units surrounding a central courtyard.

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Set atop a bluff in the walkable River Market neighborhood, Second + Delaware champions sustainable urban design with its placement and design. The developers took on a 100-year perspective in creating the 330,000-square-foot property, which is centered on a large and spacious shared courtyard. Accessible green space is also found in the landscaping surrounding the building and on the planted rooftops.

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white bedroom with beige bed and large windows

User comfort and energy efficiency is achieved with triple-glazed, certified windows set within highly insulated frames that let in an abundance of natural light without risking energy loss. Constant fresh air is funneled inside with a Dedicated Outside Air System (DOAS), while superior indoor air quality is ensured with a ventilation system and Variable Refrigerant Flow (VRF) heat pumps. The building envelope is also made airtight with 16-inch-thick walls that include a 6-inch layer of insulation sandwiched between 10 inches of concrete.

dimly lit apartment with modern furnishings

“Now is the time for developers to think bigger than ever before,” said Jonathan Arnold, co-developer and principal of Arnold Development Group. “We have the technologies we need to deliver safer, more responsible, and equally beautiful solutions to the built world. I hope that Second + Delaware will be the impetus that moves our industry forward.” In addition to energy-efficient appliances, residents will also have access to a saltwater swimming pool, bookable raised rooftop garden beds, fitness and yoga facilities, bicycle storage and electric car-sharing stations.

+ Second + Delaware

Images by Arnold Imaging

large apartment complex swimming pool at night