Lucy C. Williams, Architect is an architectural design studio specializing in contemporary, sustainable design, located in Saint Louis, Missouri.  The firm is a Women's Business Enterprise; certified with the City of St. Louis and the State of Missouri.


Lucy Williams, AIA is a sole practitioner with over 20 years of experience.  In 2009, Lucy established her own studio to pursue her passion for conservation and the issue of climate change as it relates to contemporary architecture. Her architectural experience has covered projects of varying scale and programs including but not limited to performing arts centers, higher education, corporate offices, state parks, and residential work.


As Principal of Lucy C. Williams, Architect, every project has Lucy's direct involvement and management.  Lucy is a registered Architect in the States of Missouri, New York and Illinois and also holds an NCARB certificate.  She has been a LEED-AP since 2003 and is certified by the Construction Specifications Institute as a Construction Documents Technologist (CDT) as well as a Certified Construction Specifier (CCS).  She is an active member of the AIA St. Louis Chapter, have served as the 2019 Chapter President.  Lucy is a graduate of the CORO: Women in Leadership program. She has taught sustainable design courses at various local universities and has lectured at trade conferences and published articles on the topic of achieving LEED certification.




 “I have been fortunate to work with Lucy as both client and colleague over the past eight years, and continue to be impressed by her level of detail, project commitment, and selfless ability to challenge teams to exceed initial expectations. She has never failed to deliver on an assignment, and as an architect, has the rare ability to balance sound sustainability practices with client-focused cost control.”

-David Bertorelli, Client



“Learning any new approach to a familiar task is daunting. Fortunately, my first exposure to LEED in construction came on a project headed up by Lucy Williams. I quickly discovered, and have since come to appreciate, that her thorough approach to product and materials specifications as well as document submission were the key to success. I would welcome working with her on any project, LEED or otherwise, in the future”.

-Randy McLaren, General Contractor

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Lucy C. Williams,  ArchitecT



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