C of O
Most cities require an occupancy permit (C of O). Check with your local city hall. This permit assures that you comply with the fire and safety codes and that the premises are suitable for the type of business intended. When leasing space, be sure the lease can be canceled if you cannot get the occupancy permit.
Specail permits or Lic.
If yours is one of the businesses that requires a special license or permit, be sure that you can comply before leasing any space or buying equipment. If you have to have the space first, get a clause in the lease that lets you off the hook in the event you cannot get an operating permit or a C of O.
Restaurants will need a health inspection in addition to the other C of O inspections.