About
We are a visionary and acclaimed Architecture and Design studio, distinguished by 50+ years of professional experience. Our approach balances pragmatic decision-making with a deep passion for design, enabling us to deliver solutions that are both practical and inspired.
HapstakDemetriou+ is guided by it's founders, Olvia C. Demetriou, FAIA and Peter F. Hapstak III, AIA.
Both are accomplished design professionals whose careers have been celebrated for their commitment to innovation and the creation of timeless works.
Our expertise spans a broad range of disciplines, including architecture, interiors, hospitality design, residential design, event and exhibit spaces, retail, fine and casual dining, quick service restaurant chains, branding, graphic design, historic preservation, special projects and more. This diverse portfolio reflects our ability to tailor solutions to the unique demands of each project, ensuring exceptional results across various sectors.
OLVIA C. DEMETRIOU, FAIA
PRINCIPAL / OWNER & FOUNDER
Olvia C. Demetriou, FAIA is considered to be one of the country’s preeminent hospitality designers. Her work is marked by clarity of vision, innovation and excellence in design. Olvia approaches each new project with freshness and vigor while imparting thoughtfulness and wisdom from years of creating award-winning spaces
PETER F. HAPSTAK
PRINCIPAL / OWNER & FOUNDER
Peter F. Hapstak III, AIA has a design career deeply rooted in Washington, DC as well as across the United States and abroad. His Bauhaus style of education and hands-on approach has produced environments that are precise, layered, highly crafted and visually engaging. Peter has established a reputation for providing the highest caliber of service while challenging his clients to reach beyond the expected.
SENIOR LEADERSHIP
BILL YOUNG
Studio Director
CHRIS CORNEAL
Studio Director
ALEXI F. ADAMSTEIN
Studio Director
ANDREA GIRON MEJIA
Senior Project Manager
MARC SANTOS
Office Manager
