Hammerwell
Colorado custom-home builder applying Passive House envelope and construction testing to architect-led residences.
What they're known for
Built the Passive House Classic-certified Louisville Marshall Fire rebuild with B.PUBLIC's R-52 wall and R-59 roof panels.
Founded in 1977, Hammerwell is a Colorado custom-home builder working with architects on residential construction in the Boulder and Salida areas. Its high-performance practice emphasizes air and water sealing, appropriately sized mechanical systems, blower-door testing and balanced fresh-air ventilation. Hammerwell built the Louisville Passive House for a family rebuilding after the Marshall Fire, using prefabricated B.PUBLIC assemblies; that project earned Passive House Classic certification in 2025.
Capabilities
- Custom residential construction
- Passive House envelope detailing
- Blower Door and enclosure verification coordination
- Prefabricated Panel construction coordination
- Architect Led construction management
- Ventilation and mechanical commissioning coordination
Performance focus
- Passive House construction
- Airtightness and thermal bridging
- High Insulation wall and roof assemblies
- Fresh Air ventilation
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Sources
Facts verified November 2026. Compound is an independent editorial directory and is not affiliated with this company unless stated.