Overview
Chimney inspections come in three defined levels, and the distinction is not marketing. It is set out in NFPA 211 and it determines how much of your chimney actually gets examined. Most homeowners only ever need to understand the first two.
Level 1: the annual check
A Level 1 inspection is a visual examination of the readily accessible portions of the chimney and the appliance it serves. The technician checks the firebox, the damper, the accessible flue from top and bottom, and the exterior structure including crown, cap and flashing. It confirms the chimney is structurally sound, clear of obstruction, and free of combustible deposits.
This is the inspection that accompanies a routine annual sweep, and for a chimney in continuous use whose condition and use have not changed, it is the appropriate level. If nothing about your system has changed since last year and there are no symptoms, Level 1 is what you need.
Level 2: the camera survey
A Level 2 includes everything in a Level 1 and adds two things. First, inspection of accessible portions of the chimney exterior and interior including attic, crawlspace and basement areas where the chimney passes through. Second, and this is the important part, a video survey of the internal flue along its full length.
The camera is what changes the picture. The flue liner is the component doing the most safety-critical work in the entire structure, and it is completely invisible without one. A cracked clay tile, a displaced joint, a gap in a metal liner, a section where heat has been reaching framing: none of that shows from the firebox or the roof.
NFPA 211 calls for a Level 2 inspection on any transfer of property, after any chimney fire or seismic event, and whenever the appliance or fuel type changes. Those are the trigger conditions worth memorising.
When a Level 2 is the right call
- You are buying or selling the property
- The chimney has had a flue fire, however minor it appeared
- There has been a significant earthquake since the last inspection
- You are installing a gas insert, wood stove or any new appliance
- You are changing fuel type, most commonly wood to gas
- The property has been vacant or the fireplace unused for years
- Your insurer has asked for documentation of the chimney's condition
- Fragments of clay tile are appearing in the firebox
Why this matters more in our area than most
Two local factors push a lot of Conejo Valley chimneys into Level 2 territory. The first is seismic. The 1994 Northridge earthquake caused widespread chimney damage across the west San Fernando Valley, and exterior repairs were frequently prioritised over the flue itself. We still find cracked and displaced clay tiles in Woodland Hills that trace directly to that event, sitting in chimneys that look entirely sound from the room.
The second is fire. Radiant heat from a nearby wildfire can crack a clay liner through without leaving any external sign at all. Properties in and around the 2018 Woolsey Fire footprint, which took in parts of Agoura Hills, Calabasas and a great deal of Malibu, are worth surveying with a camera even where the structure was never touched by flame.
What Level 3 is, and why you probably will not need one
A Level 3 inspection involves removing parts of the structure or the building to reach a concealed area, and it is only carried out when a Level 1 or Level 2 has produced serious evidence of a hazard that cannot be evaluated any other way. It is destructive by nature and it is rare. If someone recommends one, they should be able to point at exactly what the Level 2 found that justifies it.
What you should get afterwards
Whichever level you have, insist on a written report. It should grade each component clearly, attach the photograph or video still supporting each finding, and use plain language about whether the chimney is safe to use. Ambiguous wording that leaves you unsure whether you can light a fire is not a report, it is a liability shield.
If the inspection turns up defects, the repair quote should be a separate document. An inspection report that doubles as a sales pitch is difficult to evaluate on its own merits, and you are entitled to take the findings to whoever you like.
Want a professional to take a look?
Advanced Chimney Sweep Solutions serves 12 cities across the Conejo Valley and Ventura County, 24 hours a day. Free, no-obligation estimates.
Frequently Asked Questions
Typically thirty to sixty minutes more than a Level 1, because the camera survey is methodical and the footage needs reviewing properly rather than glancing at a screen. On a straightforward single-flue property, a Level 2 usually fits comfortably within a two-hour appointment.
No. A general home inspection covers what is visible from the room and the roof, which is roughly a partial Level 1. Home inspectors routinely note that limitation in their own reports and recommend a specialist inspection, precisely because the flue interior is outside their scope.