Top 145 Office Core and Shell Architecture Firms for 2025

Gensler, Stantec, Page, Skidmore, Owings & Merrill, Perkins&Will, JLL, NBBJ, and Kohn Pedersen Fox top Building Design+Construction's ranking of the nation's largest office core and shell architecture and architecture engineering (AE) firms for 2025, as reported in BD+C's 2025 Giants 400 Report.
Source David Barista, Editorial Director
Jan. 7, 2026
Image by PublicDomainPictures from Pixabay
Image by PublicDomainPictures from Pixabay

Image by PublicDomainPictures from Pixabay

Gensler, Stantec, Page, Skidmore, Owings & Merrill, Perkins&Will, JLL, NBBJ, and Kohn Pedersen Fox top Building Design+Construction's ranking of the nation's largest office core and shell 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

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