Sustainability / LEED

Sustainability is a critical component of our practice. Our designers are constantly researching emerging strategies, best practices, and new tools as part of our comprehensive approach to sustainable design. At the beginning of a project we consider broad-based site and planning analyses before identifying energy-saving systems, time-saving construction methods and healthy indoor materials in order to respect natural resources and minimize a building’s environmental impact. We frequently collaborate with sustainability experts and consultants to identify creative and cutting edge strategies for our clients.

We have 37 LEED Accredited Professionals in our firm and we have more than 29 Certified or Registered projects making us a state-wide leader in green design. While LEED achievements are noteworthy, our focus on sustainability has led to user-friendly facilities that perform very well. Energy-modeling technologies have allowed us to analyze the life-cycle cost and payback periods for various energy efficiency strategies. Sustainable design strategies are transforming the way we design and detail facilities and are having a dramatic effect on the success of facilities as measured by operational cost and user experience.

LEED Projects


Biorenewables Research Laboratory, Iowa State University Gold
Bright Grandview Golf Course Clubhouse Certified
Carnegie-Stout Public Library Silver (EB)
Cedar Rapids Public Library Platinum
Corporate Daycare Gold
Delta Dental Office Headquarters Silver
Delta Dental Office Headquarters Expansion Gold
Des Moines Fire Training & Logistics Silver
Design Engineers Office Building Gold
Hach Hall Chemistry Building, Iowa State University Gold
Hansen Agriculture Pavilion, Iowa State University Gold
HNI/Gunlocke Office Headquarters Gold
John Deere Financial Worldwide Headquarters Expansion Gold
KJWW Expansion Silver
Linn County Options Building Silver
Mercy Hall-Perrine Cancer Center Certified
National Czech & Slovak Museum and Library* Gold
Pioneer Crescent Phase 2 Gold
Prairiewoods Spirituality Retreat Center* Gold (EB)
Rockwell Collins Building 130 Gold (EB)
Rockwell Collins Building 131 Gold (EB)
STAMATS Headquarters Gold (CI)
State Hygienic Laboratory, University of Iowa Gold
United States Courthouse Cedar Rapids Gold
Washington Free Public Library Silver
Williamsburg Public Library Gold


Agricultural and Biosystems Engineering, Iowa State University Gold
Allsteel Offices Silver (EB)
Allsteel Plant Silver (EB)
Ankeny City Hall and Library Silver
Hancher Auditorium, University of Iowa Gold
Krause Gateway Center Silver


* Designed by other firms. OPN provided LEED consulting or documentation services.