If the work you are performing does not trigger any building code or zoning code requirements then you would be required to file an application for a Certificate of Occupancy. Once filed, you should request an inspection of the tenant space by the building inspector approximately one week prior to opening; there are times when an inspection by the Fire Department is needed as well. During the inspection the building inspector will be looking at the existing building elements to determine if they are being properly maintained. For example, exit doors, exit signs and emergency lights should be operational; Handrails should be properly secured, fire extinguishers should be up to date and tagged, etc. You also want to tell the building inspector where and how you will be locating furniture, display cases, cubicles, etc. since their placement may obstruct a required egress path or door. If any building element is in disrepair then it will be required to be repaired/replaced and re-inspected prior to opening your business.