Overview
Chimneys are one of the more reliable sources of late surprises in a residential transaction, and the reason is structural rather than anybody's fault. The standard home inspection does not cover the inside of the flue, so the component most likely to carry an expensive defect is also the one nobody has looked at.
What a general home inspection actually covers
A competent home inspector will look at the fireplace from the room, check the damper operates, and look at the chimney from the roof or the ground. That is a reasonable scope for a generalist, and most inspectors are explicit about its limits: their reports routinely note that the flue interior was not inspected and recommend evaluation by a chimney specialist.
That recommendation gets skimmed past constantly. It is one line in a document that is frequently sixty pages long, and it arrives at a point in the transaction when everyone is focused on the roof and the foundation.
Why the flue is where the money is
The liner is the component doing the safety-critical work, and it is invisible without a camera. Cracked or displaced clay tiles, gaps in a metal liner, sections where heat has been reaching framing: none of that shows from the firebox or the roof, and all of it is expensive. A full reline is not a minor line item, and discovering the need for one after closing is a bad afternoon.
NFPA 211 addresses this directly by calling for a Level 2 inspection, which includes a full internal camera survey, on any transfer of property. It is the recognised standard for exactly this situation.
If you are buying
Get the chimney inspected during your contingency period, separately from the general home inspection, if the property has a fireplace of any kind. Two local factors make this more than box-ticking here.
- Seismic history: the 1994 Northridge earthquake cracked chimneys across the west valley, and exterior repairs were often prioritised over the flue itself
- Fire history: radiant heat from the 2018 Woolsey Fire can have cracked liners in Agoura Hills, Calabasas and Malibu properties that were never touched by flame
- Age: much of the older housing stock in Woodland Hills, Simi Valley and Casa Conejo has original clay liners now six decades old
- Vacancy: a fireplace unused for years is a strong candidate for animal nesting and undetected water damage
A Level 2 report gives you either peace of mind or a documented, photographed basis for renegotiation. Both are worth substantially more than the inspection costs.
If you are selling
The argument for inspecting before you list is straightforward: it puts you in control of the information. If the chimney is sound, you have documentation that removes a question mark and heads off a buyer's request. If it is not, you find out on your own timeline, when you can get competitive quotes and decide whether to repair it or price it in.
The alternative is that a buyer's inspector finds it during the contingency period, when you have no time, no leverage, and a buyer who is now wondering what else has not been looked at. Defects found late in escrow reliably cost more than the same defects found early, because the negotiation happens under time pressure.
Getting the inspection done before listing costs the same as getting it done during escrow. The difference is entirely in who controls the timing and the response.
What the report should contain
A transaction-grade report should grade each component clearly, attach the photograph or video still supporting each finding, and state plainly whether the chimney is safe to use in its current condition. Ambiguous language is not useful to anyone in escrow.
The repair quote, if any, should be a separate document. An inspection report that doubles as a sales pitch is difficult for a buyer, a seller or an agent to evaluate on its merits, and you should be free to take the findings to any contractor you like.
Timing
We work to escrow deadlines routinely and can usually accommodate a short-notice inspection during a contingency period. The written PDF report goes out the same day in almost every case, so it can be forwarded to your agent or the other side without holding anything up. Tell us the deadline when you book and we will confirm we can meet it before you commit.
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
We would still recommend one. Decorative-only is a description, not a certification, and it does not stop a future owner lighting a fire. It also does not address water intrusion, structural condition or animal nesting, all of which affect the building whether or not anyone burns anything.
It varies with local practice and how the deal is structured, and it is negotiable like anything else. Buyers commonly arrange it as part of their due diligence. Sellers increasingly commission one before listing precisely to avoid a surprise later. Either way the cost is modest relative to what it can uncover.