Level I vs Level II Chimney Inspections
When each inspection level applies and what each one includes — so you know exactly what to ask for.
Level I: Annual Routine Inspection
A Level I inspection is appropriate when your chimney system has not changed — same appliance, same fuel, and normal use. It covers all readily accessible areas of the chimney interior and exterior, and the accessible portions of the appliance and the chimney connection.
What's checked: firebox condition, damper operation, smoke chamber, visible liner sections, crown, and exterior masonry. This is the most common inspection and is included with most annual cleanings.
Level II: Required for Changes or Transactions
A Level II inspection is required when any change has been made to the system, or when a property is being sold or transferred. NFPA 211 specifies Level II inspections upon:
What's added over Level I: accessible attic, crawl space, and basement areas, plus a video scan of the flue interior with documented findings. The written report is more detailed and is typically used for real estate disclosures.
Level III: Invasive Investigation
Level III inspections involve removing portions of the building structure (such as removing drywall or chimney components) to investigate hidden areas. They are typically triggered by a Level II finding that cannot be resolved non-invasively. This is uncommon and typically follows a suspected serious structural issue or chimney fire.
Which Do You Need?
| Situation | Recommended Level |
| Annual checkup, nothing changed | Level I |
| Buying or selling a home | Level II |
| Installing a new wood stove insert | Level II |
| After a chimney fire | Level II |
| Switching from gas to wood fuel | Level II |
| Suspected hidden structural issue | Level III |