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Trusted Architects for Innovative Design Solutions
At Ittner Architects, we approach every project with a commitment to understanding our clients' unique needs through active listening and collaboration. Our 120-year legacy in architectural design began with pioneering innovations in school planning and has evolved into a comprehensive service offering across education, healthcare, performing arts, and municipal sectors. With a team of over 140 professionals, we combine architecture, engineering, and construction advisory services to deliver tailored environments that optimize performance and experience. Our integrated service model ensures access to expertise in mechanical-electrical-plumbing engineering, structural engineering, and sustainable design, including LEED-certified solutions. We pride ourselves on transforming spaces through informed design, as evidenced by our completion of 5,000+ projects that reflect our dedication to continuous improvement and client satisfaction.

From early childhood education facilities to higher education campuses, our work prioritizes functionality, accessibility, and future-ready design. Our historical innovations, such as standardized school plans and community-focused zoning, continue to influence modern design principles like daylight harvesting and life-safety remediation. We maintain a client-centric approach, engaging directly with end-users to ensure projects meet practical needs while achieving aesthetic excellence. Our national recognition in equity in education initiatives underscores our commitment to creating inclusive learning environments. With offices in St. Louis, Chicago, Lafayette, Aurora, and Madrid, we bring localized expertise to every community we serve.
Services
Architecture Interior Design Construction Advisory Engineering Planning
Highlights and features
  • 120 years of architectural innovation and expertise
  • Completed 5,000+ successful projects nationwide
  • Integrated team of 140+ multidisciplinary professionals
  • LEED-certified sustainable design capabilities
  • Client-focused approach with community engagement
Associations and certifications
  • LEED Platinum
  • LEED Gold
  • LEED Silver
What people say
Exceeded expectations Joy to showcase Kid-oriented design Superior results
Services
Architecture
Our architectural services encompass new construction, building additions, and historic renovations with a focus on sustainable design. We specialize in educational facilities, performing arts centers, and municipal buildings, incorporating LEED-certified practices and energy-efficient systems. With 120 years of experience, we create functional spaces that address both current and future needs while maintaining aesthetic excellence.
Interior Design
We offer comprehensive interior design solutions that optimize space functionality and occupant well-being. Our services include color and material selection, furniture specification, and sustainable design strategies tailored to educational, healthcare, and commercial environments. Our team ensures cohesive design integration with building systems and accessibility requirements.
Construction Advisory
Our construction advisory services provide expert guidance through all project phases, from design development to final completion. We offer cost estimating, value engineering, and construction administration to ensure projects meet quality standards and budget requirements while maintaining design integrity throughout the building process.
Engineering
We deliver integrated MEP (mechanical, electrical, plumbing) and structural engineering solutions tailored to diverse building types. Our services include energy modeling, renewable energy analysis, and life-safety system design, ensuring optimal building performance and compliance with current codes and sustainability standards.
Planning
Our planning services cover campus master plans, phased development strategies, and facilities needs assessments. We combine functional requirements with long-term sustainability goals to create comprehensive solutions for educational institutions, municipalities, and commercial clients seeking optimized spatial organization and future-ready infrastructure.
Questions
What architectural services does Cordogan Clark offer?
We provide full-service architecture, interior design, engineering, and construction advisory services for educational, healthcare, performing arts, and municipal projects.
How long has Cordogan Clark been in business?
Our firm has 120 years of architectural experience, with our origins dating back to 1899 through the legacy of Wm. B. Ittner.
Do you specialize in sustainable design?
Yes, we offer LEED-certified design solutions and specialize in energy-efficient systems, daylight harvesting, and sustainable building practices across all project types.
What geographic areas do you serve?
We operate from offices in St. Louis, Chicago, Aurora, Lafayette, and Madrid, serving clients nationwide with localized design expertise.
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Reviews (1)
J. Clark
Jan 26, 2020 Report
Ittner has tremendous depth: Founded by William Ittner who designed more than 430 schools nationwide and has over 35 buildings on the National Register of Historic Places, the firm remained innovative in education design, and gained new life under the direction of Dennis Young, whose Issues in Education is a leading forum on current and future thinking in educational design.