Business Details
29 Years
experience
Award-Winning Sustainable Architecture in Berkeley, CA
Turnbull Griffin Haesloop is an award-winning architecture firm founded in 1997 by Eric Haesloop and Mary Griffin to continue William Turnbull Jr.'s legacy of creating enduring architectural value rooted in site-specific design. Based in Berkeley, California, we specialize in sustainable, site-sensitive residential projects and consult on larger-scale developments. Our approach prioritizes topography, microclimate, solar orientation, and ecological context, using materials that harmonize with their surroundings.We emphasize indoor-outdoor integration, daylighting, and craftsmanship, tailoring each design to client needs and environmental conditions. With decades of collective experience, our team has completed notable projects across California and beyond, including Sea Ranch residences, educational facilities, and community spaces. We remain committed to advancing architectural excellence through thoughtful design that enhances both landscapes and human experiences.
Services
Residential Architecture
Sustainable Design
Site Analysis
Historic Renovations
Community Consulting
Details
- Year established: 1997
Highlights and features
- We have over 25 years of experience in sustainable residential architecture
- Our designs prioritize site-specific environmental integration
- We combine green building principles with artisanal craftsmanship
- Our team includes LEED-certified professionals
- We maintain a legacy of award-winning projects across California
Services
Residential Architecture
We create custom homes that harmonize with their natural surroundings. Our approach integrates topography, climate, and vegetation to produce energy-efficient dwellings with seamless indoor-outdoor connections. Each project emphasizes craftsmanship and material authenticity.
Sustainable Design
Our sustainable design practice focuses on minimizing environmental impact through passive solar strategies, local material sourcing, and energy-efficient systems. We prioritize LEED-certified methodologies and climate-responsive construction techniques for all projects.
Site Analysis
We conduct comprehensive assessments of topography, microclimate, and ecological factors to inform design decisions. This includes solar path analysis, vegetation preservation strategies, and water resource management planning for optimal site integration.
Historic Renovations
Specializing in preserving architectural legacy while modernizing functionality, we restore historic structures using period-appropriate materials and techniques. Our work maintains original character while incorporating contemporary sustainability standards and code compliance.
Community Consulting
We provide design expertise for educational facilities, community centers, and institutional buildings. Our consulting services focus on creating functional, sustainable spaces that serve public needs while respecting environmental contexts.
People
Eric Haesloop
Principal
Co-founder with over 25 years of experience in sustainable architecture. Specializes in site-integrated design and has led award-winning residential and community projects across California's diverse landscapes.
Mary Griffin
Consultant
Co-founder and design visionary with expertise in material selection and spatial relationships. Continues to influence projects through her deep understanding of environmental context and architectural heritage.
Jule Tsai
Senior Associate
Senior designer with 15+ years at TGH, specializing in complex site analysis and sustainable systems integration. Plays key role in developing climate-responsive solutions for residential and institutional projects.
Sara Dewey
Senior Associate
Experienced project lead focused on historic preservation and community-driven design. Expert in balancing modern functionality with architectural heritage in sensitive environments.
Matt Au
Associate
Talented designer with expertise in digital modeling and sustainable construction techniques. Contributes to both residential and large-scale projects with innovative problem-solving approaches.
Questions
What architectural services do you specialize in?
We focus on sustainable residential design, historic renovations, and site-sensitive architecture for both private homes and community projects.
Do you work outside the Bay Area?
Yes, while based in Berkeley, we've completed projects across California including Sea Ranch, Napa Valley, and Lake Tahoe regions.
How do you incorporate sustainability into designs?
We prioritize local materials, passive solar design, natural ventilation, and fire-resilient construction methods tailored to each site's ecology.
Can you handle historic property renovations?
Yes, we have extensive experience with historic preservation projects while integrating modern sustainability standards.
What's your design process like?
We begin with comprehensive site analysis, then collaborate closely with clients through iterative design phases to ensure optimal solutions.
