Dunning Street Passive House

Location: Madison, WI

Client: Threshold Development Group

Completion Date: 2025

Project Type: Multi-family,

Project Overview

252 Dunning Street is a new construction, PHIUS-certified passive house multifamily building in the Atwood neighborhood of Madison WI. In coordination with local Architect of Record Knothe & Bruce Architects, Onion Flats Architecture served as Consultant Architect and Passive House Consultant, providing critical design and detailing input, while also managing energy modeling and PHIUS coordination. The 3-story, 32 dwelling unit building sits atop a partially bermed parking garage, and is Madison’s first Passive House certified market-rate multifamily building. A 24 kW rooftop solar array generates approximately 32,091 kWh annually, offsetting an additional 19% of the building’s already optimized energy use.