Colorado ADU Builder
Reimagining how homes (and families) come together
Homes can be healthy, beautiful, and enduring; a place where generations thrive together.
Phoenix Haus began with a deeply personal mission: to make homebuilding healthier, smarter, and more connected. What started as one family’s search for a better way to live has evolved into a movement redefining what ‘home’ means for families and developers across the West.
Our story began with one simple question…
What is the best way to build a home?
The Mission
Where purpose meets precision
Too many families live apart in homes that separate rather than support them. Phoenix Haus exists to change that.
We design and craft Passive House–level homes built off-site with precision in Colorado, helping families and developers create spaces where generations can live together in health, comfort, and connection.
Because if homebuilding remains stuck in outdated, unhealthy methods, we all lose more than our time and money; we lose the chance to build the shared future we deserve.
Core Values
A lifetime of happiness
Well-Being First: Quiet air, stable temperatures, and space for family connection are non-negotiable.
Non-Toxic by Default: Every layer, from structure to sealant, protects human and planetary health.
Polished Precision: Engineered accuracy for comfort, efficiency, and longevity.
Trustworthy Guides: We simplify the process and stay beside you from concept to completion.
Sustainability that Pencils: Performance that makes both ecological and financial sense.
Meet the Team
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Bill McDonald
Founder
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Ryan Alvarado
Director of Production and Onsite Operations
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Luke Sanstedt
Digital Fabrication Manager
Our Story
Building better homes for the Intermountain West
Our founder, Bill McDonald, developed severe breathing issues as a child due to unexplained allergies. Growing up in a shared home with his grandparents, he saw the power of connected living and began exploring how families around the world share space for greater well-being and lower costs of living. His experience inspired a new way to think about homebuilding — one that prioritizes health, connection, and sustainability for generations.
Phoenix Haus is committed to reimagining how custom home building is done across Colorado, Utah, Idaho, Wyoming, New Mexico, Washington, and Arizona. We have spent years refining the PHI-certified Alpha System, a Passive House–level component system built in Grand Junction, Colorado.
Every Homestead model is engineered for Passive House–level performance with continuous fresh air ventilation and built from wood-based assemblies that contain no foams or oil-based chemical adhesives. We use only low-emitting, acrylic-based tapes and membranes that do not off-gas. The result is a healthier, quieter home that exceeds code requirements, improves comfort, and lowers the total cost of ownership.
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![Modern two-story house with wood and metal exterior, large windows, surrounded by trees and tall grass.]()
Model H2 | 12
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![Modern architectural design landscape with two dark-colored buildings, lush green lawn, rocks, bushes, trees, and a man standing near the entrance of one building, with sunlight casting shadows and clear blue sky.]()
Model H2 | 7
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![Modern two-story house with wood siding, surrounded by greenery and landscaped garden, with stairs leading up to the entrance and trees around.]()
Model H6 | 19
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![A modern house with solar panels on the roof, surrounded by trees with autumn foliage, in a rural setting with mountains in the background.]()
Model H6 | 23
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