If your appliance or your venting system has not changed and you plan to use your system as you have in the past, then a standard level 1 inspection is a minimum requirement. A Level 2 inspection is required when any changes are made to the system. Additionally, a Level 2 inspection is required upon the sale or transfer of a property or after an operation malfunction or external event that is likely to have caused damage to the chimney. Building fires, chimney fires, seismic events as well as weather events are all indicators that this level of inspection is warranted. $99