An As-Built Survey is used to locate construction improvements. Local or state zoning boards may require as-built surveys during a construction project or afterwards to verify that improvements are complying with applicable regulations and your proposed plans already on file. Cities and counties often require an as-built survey, which would include all buildings, parking lot details, utilities, sewer. storm drains, and curbs, for your business to receive a certificate of occupancy. Lenders will sometimes require as-built surveys as well.