Top 175 Workplace Interior Architecture Firms for 2025

Gensler, Interior Architects, HOK, Perkins&Will, Stantec, NELSON Worldwide, TPG Architecture, SmithGroup, Ted Moudis Associates, and Corgan top Building Design+Construction's ranking of the nation's largest workplace interior and office fitout architecture and architecture engineering (AE) firms for 2025, as reported in BD+C's 2025 Giants 400 Report.

Source: Building Design+Construction's 2025 Giants 400 Report