This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Possible NAICS Codes
236220 – Commercial and Institutional Building Construction
238190 – Other Foundation, Structure, and Building Exterior Contractors
238220 – Plumbing, Heating, and Air-Conditioning Contractors
237990 – Other Heavy and Civil Engineering Construction
562910 – Remediation Services
238290 – Other Building Equipment Contractors