Chimney inspection when buying or selling a house

A fireplace is easy to judge from the living room. The part that matters, the flue behind it, is not. A house sale is the one moment when a buyer has leverage to find out what is inside, and a seller has a reason to know before the buyer does. The chimney inspection service page explains each level; this guide covers the sale.

What the standard says about a sale

CSIA's guide recommends a Level 2 on a sale or transfer of the property. NFPA 211 draft language also lists “upon sale or transfer of the property” for Level 2. Note the wording: “required” is NFPA's word in the draft, and “recommended” is CSIA's. Illinois does not make a chimney inspection a legal condition of sale in anything we found, so this is a buyer and seller choice, not a state rule.

Why Level 2 and not Level 1

A Level 1 covers the readily accessible parts and checks that the flue is not blocked. It tells you the chimney looks usable. A Level 2 adds the video scan, which shows cracked or missing liner sections, gaps between tiles and deposits the eye cannot reach. If the buyer plans to change how the fireplace is used, such as adding a stove or insert or switching fuel, CSIA treats that as another reason for Level 2, because the conditions of use are changing.

A general home inspection may mention the fireplace. Ask whether the report includes a video scan of the flue. If it does not, the flue has not had a Level 2.

Why this matters more in Rockford

Rockford's median home was built in 1963. 22.4% of Rockford homes were built before 1940 and 46.5% before 1960, and across Winnebago County it is 35.5% before 1960 (Census ACS, 2020 to 2024). A chimney that age has been through many Rockford winters. January averages 21.8 F here (National Weather Service, 1991 to 2020), so masonry takes years of freeze and thaw. Older chimneys are also the ones most likely to have a clay tile liner, which is the part a camera shows and an eye does not.

Most of those houses heat with gas (83.5% of county homes). The chimney in a sale may vent a furnace or water heater, not a fireplace at all. That makes a flue defect a carbon monoxide question for the new owner. See furnace and water heater chimney liners.

What it costs

No cost guide publishes a Rockford price. Angi's sweep guide puts a Level 2 at $260 to $460 (Angi, chimney sweep cost, national, updated July 10, 2026). Its inspection guide gives a wider range, $200 to $1,000 (Angi, chimney inspection cost, national, updated October 19, 2026), and HomeAdvisor lists about $200 for one flue up to $1,000 for several (updated December 9, 2025). Compared with the price of a home, the scan is small. Compared with a rebuild or a new liner, it is cheaper to learn first. Repair ranges are on the chimney cost page.

Buyers: how to use it

• Ask for the Level 2 before the inspection period ends, and ask for the video or photos, not only a summary.
• Ask what the chimney vents. A gas furnace or water heater flue and a wood fireplace flue are different questions.
• If it finds problems, get a written, itemized quote for the repairs and bring it to the negotiation.
• Do not light the fireplace until it has been looked at, even if the seller says it was used last winter.

Sellers: how to use it

• An inspection before listing means the buyer's scan holds no surprise.
• Repair what is cheap and clear, such as a missing cap, before showings (why a chimney needs a cap).
• Keep the report. It answers questions at closing.

After the report

Any repair over $1,000 falls under the Illinois Home Repair and Remodeling Act, which names chimneys and chimney liners. The contractor must give a signed written contract with the total cost and materials, plus the state consumer rights pamphlet (815 ILCS 513/15 and /20). Illinois has no state chimney sweep license that we found, so ask any contractor for proof of insurance and for references. The hiring guide has the full checklist: how to hire a chimney sweep in Illinois.

In Rockford, an old chimney on a landmark or in a local historic district has its own rules for exterior changes. See chimney rules in Rockford historic districts before you promise a buyer a rebuild.