Cairn Collaborative

Cairn Collaborative is a San Luis Obispo, California-based design-build firm specializing in sustainable custom homes, high-performance residences, passive houses, remodels, and accessory dwelling units (ADUs). As a team of PHI (Passive House Institute) Certified designers and builders, the company is committed to creating healthy, comfortable, and environmentally responsible homes that prioritize energy efficiency, durability, and long-term performance. With more than 25 years of custom residential construction experience and over 15 years of zero-net-energy design-build expertise, Cairn Collaborative helps homeowners bring thoughtfully designed living spaces to life while reducing environmental impact.

Known for its integrated design-build approach, Cairn Collaborative manages every stage of a project, from architectural design and planning to permitting and construction. The company emphasizes sustainability, creativity, integrity, and close collaboration with clients to create homes that reflect each family’s unique lifestyle and values.

Sustainable Design-Build Services

Services Include:

• Custom home design and construction
• Passive House design and building
• Accessory Dwelling Unit (ADU) construction
• High-performance and net-zero energy homes
• Architectural design services
• Planning and permitting
• Home remodels and renovations
• Sustainable building consulting

By combining advanced building science, energy-efficient construction techniques, and exceptional craftsmanship, Cairn Collaborative delivers homes that promote comfort, resilience, and environmental stewardship.

Why Homeowners Choose Cairn Collaborative

• PHI Certified Passive House designers and builders
• More than 25 years of residential construction experience
• Specialized expertise in sustainable and low-carbon homes
• Comprehensive design-build project delivery
• Strong focus on energy efficiency and indoor comfort
• Personalized, client-centered design process
• Commitment to environmental responsibility
• Serving California’s Central Coast communities

Cairn Collaborative is dedicated to building homes that balance beauty, performance, and sustainability while helping homeowners create healthier and more efficient living environments.

Building a Better Future Through Sustainable Design

Cairn Collaborative believes that great homes should support both the people who live in them and the environment around them. Whether designing a Passive House, building an ADU, completing a remodel, or constructing a custom home, the company focuses on creating durable, energy-efficient spaces that provide lasting value for generations to come.