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Minneapolis, MN 2021

Net-Zero Energy Modeling

Sundial Apartments

Image Credit: Heirloom Properties, LLC

The Sundial Building is a 12 unit, three-story walkup building, designed to achieve net-zero energy with all electric utilities, creating net-zero missing middle housing in the heart of Minneapolis. Precipitate supported the project team through energy modeling to explore a cost-effective path for achieving net-zero energy balancing efficiency with available onsite photovoltaic energy production. During its design, it also followed and tried to right size requirements to meet objectives for the Living Building Challenge, LEED For Homes - Midrise and Enterprise Green Communities. Sundial is a pilot project for innovative stormwater management and rainwater reuse via grants from the Mississippi Watershed Management District and Hennepin County. The project is also a recipient of grants and rebates for energy efficiency, renewable energy, and enhanced indoor air quality equipment from Xcel Energy and the City of Minneapolis. It broke ground in the fall of 2021 and will open in the spring of 2022. 


  • Developer: Heirloom Properties, LLC

  • Architect: FABRIC[K] DESIGN, LLC

  • Energy Modeling: Precipitate, PLLC

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