NFPA 211 inspection Levels 1–3

Typical published planning values — NOT a certified spec or professional advice. The 1/10–1/12 flue rule, the 3-2-10 height rule, creosote stages, NFPA 211 inspection levels, clearances and cost bands vary by chimney and appliance; confirm your exact dimensions and follow the manufacturer’s instructions and local code. Creosote, chimney fire, carbon monoxide, structural and code judgement are a CSIA-certified sweep / licensed mason / NFPA 211 / local-code matter — have a certified professional inspect; never a step-by-step procedure or medical advice here.

NFPA 211 defines three inspection Levels, matched to the situation. These are LABELED planning typicals, not a certified spec; the Level is set by the situation and a CSIA-certified professional. Use them with the inspection-cost tool and the inspection-levels reference.

LevelScopeWhen
Level 1Readily accessible portions, a visual check with no special tools.Routine, no changes to the system.
Level 2Level 1 plus accessible attics, crawl spaces and a video-camera scan of the flue.On a sale or transfer, after a change of appliance or fuel, or after a fire, quake or weather event.
Level 3Levels 1–2 plus opening up concealed areas (removing a chase cover, a wall or a crown) where a serious hazard is suspected.When a Level 1 or 2 finds — or suspects — a hidden hazard.

LABELED planning typicals — the Level is set by the situation and a CSIA-certified professional, not by this table. Snapshot: 2026-07-14.

Related calculators

Chimney Inspection Cost by LevelEstimate chimney inspection cost by NFPA 211 level: Level 1 basic visual, Level 2 adds a camera scan for a sale or change, Level 3 opens concealed areas.Chimney Inspection Levels (NFPA 211)Which NFPA 211 chimney inspection level do you need? Match your situation to Level 1, 2 or 3 and see the scope of each and what triggers it.Chimney Relining CostEstimate the cost to reline an existing chimney flue: the liner length times your per-foot rate, plus labor and roof access, with a contingency. Free planning estimate, no signup.