Business Details
50+ Years
experience
Sustainable Architecture & Net-Zero Design Experts
Maclay Architects has been a leader in sustainable architectural design for over 40 years. Founded in 1970, our firm specializes in net-zero and net-positive energy buildings, combining biophilic design principles with cutting-edge building science. Our team of certified professionals holds expertise in LEED, Living Building Challenge, Passive House, and WELL certifications, delivering projects that consistently achieve the lowest energy use intensity (EUI) in cold climates. We maintain a rigorous design process incorporating energy modeling, financial analysis, and post-occupancy monitoring to ensure buildings perform as designed. With 8 LEED Gold/Platinum projects and 4 Living Building Challenge-certified projects completed, we demonstrate proven expertise in creating regenerative, carbon-positive structures.Our commitment to sustainability extends beyond buildings to community engagement, including pro bono design services for Habitat for Humanity and educational initiatives. We maintain transparent communication throughout projects, aligning client visions with measurable sustainability outcomes while maintaining cost-effectiveness. Our financial analysis methodology demonstrates that net-zero buildings typically provide positive cash flow from day one, with documented savings exceeding $13 million for clients since 1995. This combination of technical expertise, proven results, and community stewardship establishes us as trusted leaders in sustainable architecture.
Services
Sustainable Architecture
Net-Zero Design
LEED Certification
Passive House Design
Carbon Positive Buildings
Energy Modeling
Building Science Consulting
Living Building Challenge
WELL Certification
Historic Preservation
Details
- Year established: 1970
Highlights and features
- We've delivered the lowest EUI buildings in cold climates for 40+ years
- Our energy modeling methodology ensures cash flow positive net-zero buildings
- 8 LEED Gold/Platinum and 4 Living Building Challenge-certified projects completed
- Post-occupancy monitoring validates design performance through 12-month energy tracking
- Proven financial savings: $13M+ accumulated client savings since 1995
Associations and certifications
- LEED Certification
- Living Building Challenge
- Passive House Institute US
- WELL Certification
- New Buildings Institute
Services
Net-Zero Energy Design
Our net-zero energy design approach creates buildings that produce as much energy as they consume annually through renewable sources. We employ advanced building science principles including R60 roof insulation, R40 walls, and 0.06 cfm/sf air sealing standards to minimize energy demand. Our proprietary financial analysis methodology demonstrates that these buildings typically provide positive cash flow from day one, with documented savings exceeding $13 million for clients since 1995.
Living Building Challenge
We specialize in creating Living Buildings that function as self-sufficient organisms integrated with natural systems. Our designs incorporate biophilic elements, daylight optimization, and low-embodied carbon materials to create spaces that improve occupant productivity and environmental outcomes. With 4 completed LBC-certified projects, we help clients achieve the highest sustainability standard through rigorous documentation and performance verification.
Carbon Positive Design
Our carbon positive approach addresses both operational and embodied carbon impacts in building design. We prioritize materials with low embodied energy while optimizing renewable energy production to create buildings that sequester more carbon than they emit. This comprehensive strategy considers full lifecycle impacts from material extraction through building operation, ensuring measurable climate benefits from day one of construction.
Passive House Design
We implement Passive House standards to create ultra-efficient buildings requiring minimal energy for heating and cooling. Our designs feature continuous insulation, thermal bridge-free construction, and energy recovery ventilation systems meeting PHIUS+ 2018 requirements. This approach reduces energy use by up to 90% compared to conventional buildings while maintaining superior indoor air quality and occupant comfort.
Sustainable Certifications
We guide clients through multiple sustainability certification programs including LEED, WELL, and Living Building Challenge. Our team holds expertise in documenting compliance with rigorous performance metrics for energy efficiency, indoor environmental quality, and material transparency. With 8 LEED-certified projects and multiple Living Building certifications, we ensure buildings meet the highest environmental and health standards.
People
Bill Maclay
Founder
Bill Maclay has pioneered sustainable architecture for over 40 years, authoring 'The New Net Zero' and receiving the USGBC's Terry Ehrich Award. He developed the energy modeling methodology that enables cost-effective net-zero buildings and has spoken at major conferences including GreenBuild and Living Future.
Chris Cook
Principal
Chris Cook leads project teams in implementing net-zero design strategies, combining technical expertise with creative problem-solving. With 20+ years at the firm, he specializes in energy modeling and financial analysis to optimize building performance while maintaining budget constraints.
Marc W. Young
Principal
Marc W. Young focuses on sustainable materials and carbon accounting, advancing the firm's expertise in embodied carbon reduction. He contributes to industry research on climate-positive design and leads technical training for staff on the latest building science innovations.
Catherine Earley
Senior Architect
Catherine Earley specializes in historic preservation and adaptive reuse projects, integrating modern sustainability standards with traditional building techniques. She leads community engagement efforts and ensures design solutions align with local cultural and environmental contexts.
Beth Eisenhower
Project Manager
Beth Eisenhower oversees project delivery from concept through construction, ensuring adherence to sustainability goals and budget parameters. With expertise in LEED certification processes, she coordinates multidisciplinary teams to achieve high-performance building outcomes.
Questions
What is net-zero energy building design?
Net-zero energy buildings produce as much renewable energy as they consume annually through solar panels, heat pumps, and ultra-efficient envelopes. Our designs achieve this while maintaining cost-effectiveness and occupant comfort.
How do you ensure buildings meet performance goals?
We use advanced energy modeling, rigorous construction documentation, and post-occupancy monitoring. This three-phase approach validates performance against design targets and identifies optimization opportunities.
What sustainability certifications do you handle?
We manage LEED, Living Building Challenge, Passive House, and WELL certifications. Our team has completed 8 LEED Gold/Platinum projects and 4 Living Building-certified structures.
Are net-zero buildings more expensive?
Our financial analysis shows net-zero buildings typically provide positive cash flow from day one. Incremental costs are offset by energy savings, tax incentives, and long-term operational efficiencies.
How do you approach historic preservation?
We integrate modern sustainability standards with traditional techniques, preserving architectural heritage while improving energy performance through careful material selection and system integration.
What geographic areas do you serve?
While based in Vermont, we work throughout New England with completed projects in Massachusetts, New Hampshire, and Maine, adapting designs to each region's climate and regulatory environment.
