236220 – Commercial and Institutional Building Construction
Construction (including new work, additions, alterations, maintenance, and repairs) of commercial and institutional buildings and related structures
238910 – Site Preparation Contractors
Site preparation activities, such as excavating and grading, demolition and disposal of buildings and other structures, utility disconnects, earthmoving, and land clearing.
561720 – Janitorial Services
Professional cleaning of building interiors and windows.