Top 90 Multifamily Engineering Firms for 2025

Kimley-Horn, AECOM, WSP, LANGAN, Salas O'Brien, EXP, Thornton Tomasetti, and DeSimone Consulting Engineering top Building Design+Construction's ranking of the nation's largest multifamily housing sector engineering and engineering/architecture (EA) firms for 2025, as reported in BD+C's 2025 Giants 400 Report. Note: This ranking factors revenue for all multifamily buildings work, including apartments, condominiums, student housing facilities, and senior living facilities. 

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