Steven Winter Associates
Building-science and high-performance consulting across the United States.
What they're known for
A building-performance consultancy working in Passive House, commissioning, energy, accessibility, healthy buildings, and certification since 1972.
Steven Winter Associates is a building-performance consultancy founded in 1972, with offices in Norwalk, New York, Washington and Boston and work across the United States. The firm provides energy, sustainability, commissioning, certification, accessibility and building-science services across residential and larger building types. Its role on The House at Cornell Tech included Passive House consulting, certification, commissioning and energy modeling. SWA belongs as an engineering and building-science firm with unusually deep experience translating performance standards into constructed projects.
Capabilities
- Building-Science Consulting
- MEP Engineering
Performance focus
- Passive House
- Indoor Air
- Thermal Comfort
- Low-Carbon Construction
Credentials
Passive House Institute accredited certifier
SWA states its Passive House team became an accredited PHI certifier in 2019.
Notable projects
- New York, NY
The House at Cornell Tech
26-story Roosevelt Island residential tower that became the world’s tallest Passive House-certified building; SWA served as Passive House consultant, certifier, commissioning agent, accessibility consultant, and energy modeler.
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Sources
Facts verified September 2026. Compound is an independent editorial directory and is not affiliated with this company unless stated.