Every inspection cycle in Billings turns on the same short list of surprises, and the leverage over each one shifted in 2023 when Montana finally put a seller disclosure statute on the books. The old caveat emptor default is gone. What replaced it is a form that asks sellers to commit, in writing, to what they actually know about the roof, the foundation, the water intrusion history, and any adverse material fact affecting the property. That form, combined with a slower market, is why inspection findings in Billings have real dollars attached again.
Local supply has loosened. Billings is now sitting at 4.8 months of supply with homes averaging 90+ days on market, which means buyers have room to write real contingencies and sellers have reason to prepare for what those contingencies will surface. Four frictions decide most of those conversations. Understanding each one, and who now owns it under Montana law, is the difference between negotiating from information and negotiating from a repair estimate the other side wrote.
The 2023 shift that changed who owns the answer
For decades Montana was a buyer-beware state. That is no longer the default. In 2023, the Montana Legislature updated state law to match most other states by requiring sellers of residential property to give buyers a disclosure statement listing any known material problems with the property that could affect its value or use, as long as the seller is aware of them. The statute, MCA 70-20-502, is specific about what the form must cover: title matters, water service, wastewater, utility connections, and matters affecting the buildings or other structures designed or intended for occupancy as a residence, including water intrusion, and problems or other issues related to any structural system or improvement, including any well, septic system, roof, foundation, plumbing, electrical system, heating system, windows, doors, or appliances, plus a catchall for any other adverse material fact.
Two older Montana disclosure laws still stack on top. Under the Montana Mold Disclosure Act, if a seller or their agent has knowledge of mold in the property, they must disclose that to the buyer prior to or at the time of sale. The standard form also asks whether the property has ever been used as a clandestine methamphetamine lab, and federal lead-based paint disclosure still applies to homes built before 1978. Layered on top of the seller's obligations, a broker is required by law to disclose to each prospective buyer any material fact about a property of which broker is aware or should reasonably be aware, even if the seller chooses not to disclose or makes no representation concerning the matter.
The practical result: three of the four frictions below now have a line on the disclosure form. The fourth, radon, does not, which is exactly why it keeps catching people off guard.
Radon: the number that never touches the disclosure form
Yellowstone County reads on the EPA map as a moderate risk area, but the field data tells a different story. Montana's largest city in Yellowstone County has recorded an average radon level of 5.33 pCi/L across multiple zip codes including 59101, 59102, and 59105, a reading that exceeds the EPA action level and reflects Billings' position atop Tertiary sediments and Fort Union Formation rocks along the Yellowstone River valley. The EPA action threshold is 4.0 pCi/L. Homes above that number are candidates for mitigation.
Testing during a transaction is inexpensive relative to the negotiation it enables. A short-term radon test is typically included as part of the home inspection process and costs $150 to $250, and if elevated levels are found, you can negotiate mitigation as part of the sale. Mitigation itself is not exotic work. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000 to $1,500 range. Firms like Billings Radon Pros and Yellowstone Home Inspections handle testing locally, and reports are formatted for real estate use.
Because Montana does not require sellers to disclose radon, the mitigation credit is a pure negotiation item that lives in the inspection addendum, not the disclosure form. Sellers who test before listing take that lever out of the buyer's hands. Sellers who do not are agreeing, quietly, that a $150 test will set the price of a $1,500 concession.
The foundation question your inspector will keep asking
The second friction is soil. Billings sits on clay-rich ground that moves with moisture, which is why local foundation inspections read differently than they would in a granular-soil market. Groundworks, one of the region's more visible foundation contractors, describes the exposure plainly: Billings's soil can significantly impact house foundations due to its clay content which tends to expand and contract with moisture changes, and this movement can put stress on foundations resulting in cracks or shifting over time.
Inspectors flag a familiar cluster of symptoms in older Billings homes. What follows tends to appear on Yellowstone County inspection reports more often than in other markets:
- Diagonal drywall cracks radiating from door and window corners
- Interior doors that stick seasonally or fail to latch
- Uneven or humped floors near load-bearing walls
- Downspouts discharging within a few feet of the foundation
- Negative grading toward the house on one or more elevations
- Existing helical or push pier installations, which now belong on the disclosure form under structural improvements
A previous pier repair is not automatically a problem. What matters is whether the seller has documentation, whether the work carries a transferable warranty, and whether the repair addressed cause or symptom. Under MCA 70-20-502, prior structural repair work is a known material fact and lives on the form. Under the broker's independent duty, so does anything the listing agent has been told about it.
The roof math that broke this year
The third friction is the roof, and this is the one where 2026 changed the arithmetic. Billings sits in an active hail corridor at the base of the Rimrocks, and asphalt shingle roofs age fast against the combination of hail, UV, and freeze-thaw. What used to be a straightforward inspection line item now interacts with insurance policy language in ways buyers frequently miss.
In 2026, many Montana insurers are reclassifying roofs over 20 years old as ACV-only policies, meaning heavier depreciation and significantly lower payouts, and homes in older Billings neighborhoods like Pioneer Park and Downtown are most vulnerable to this shift. The gap between the two coverage structures is real money on a Billings-sized roof:
| Coverage type | What it pays | Practical effect on a 12-year-old roof |
|---|---|---|
| Replacement Cost Value | Full cost to replace with like materials, minus deductible | Buyer collects close to full 2026 replacement cost |
| Actual Cash Value | Depreciated value based on age and expected lifespan | A difference that can cost you $5,000 to $8,000 out of pocket for a 12-year-old roof |
The dollar range matters because in 2026, a full roof replacement in Billings runs between $9,000 and $19,000 for a standard 2,000 sq. ft. home using architectural asphalt shingles. Wegner Roofing & Solar and Big Sky Contractors are two of the local contractors most active on post-storm documentation, and Darnielle Insurance is one of the local agencies that publishes clear guidance on the claims process for Billings homeowners.
Premiums vary meaningfully by ZIP within the city. Zip 59101 covering the South Side and Downtown has older construction stock with higher average premiums, 59105 in the Heights sees an active hail history with rates regularly reaching $3,800 to $4,500 or more, 59106 covering the West End and Shiloh Road has newer builds with updated roofing and more competitive pricing, and 59102 in West Billings has mixed housing inventory with mid-range rates typical. Buyers who assume premium continuity across a city-wide search learn the hard way. Class 4 impact-resistant roofing cuts premiums 15% to 30% with most major carriers serving the Billings market, which is why a Class 4 upgrade tied to a storm claim can become part of the sale rather than a post-closing project.
Two questions belong in every buyer's inspection addendum on a Billings home: the roof's age as documented by the seller, and the seller's carrier's current position on ACV versus RCV for a roof of that age. Both are cheap to ask. Neither will be volunteered.
Working the four before you sign
The frictions overlap. A house on clay soil in the Heights with a 22-year-old roof and a wet basement is not four separate problems, it is one negotiation with four levers. In a market where buyers have days on market working in their favor, sequencing matters:
- Pull the seller's disclosure statement before writing the offer and read every "yes" answer as a question, not an answer. Prior mold, prior water intrusion, prior structural repair, and prior methamphetamine remediation are the four items that most often need documentation attached.
- Order the radon test with the general inspection. It is the cheapest lever on the list, it is not on the disclosure form, and it is the one sellers most often have not thought about.
- Ask the seller in writing for the roof's install date, any hail claims filed, and whether the current homeowner's policy pays ACV or RCV. If the answer is ACV on a roof past 15 years, price accordingly.
- On any inspection callout involving foundation movement, ask for the engineer's report or pier warranty, not the contractor's invoice. The invoice tells you what was done. The report tells you whether it worked.
Sellers who run the same sequence in reverse, before listing, take most of these levers off the table entirely.
FAQ
Does Montana require sellers to disclose radon? No. The 2023 disclosure statute covers structural, water, and other adverse material facts, but radon is not specifically listed. In practice, radon is negotiated inside the inspection contingency rather than disclosed on the form.
How long does a buyer have to file a hail claim after a Billings storm? Montana law gives homeowners one year from the storm date to file a hail damage claim, though carriers push back harder as that window narrows.
What triggers the Montana Mold Disclosure Act at sale? Actual knowledge. Montana's Mold Disclosure Act mandates that property sellers who know a building has mold present tell any prospective buyers about the issue before or simultaneously with signing a purchase contract, and if mold testing has been done, the seller must advise buyers and provide a copy of the results as well as evidence of any follow-up mitigation or treatment.
Is a prior pier repair a red flag? Not by itself. What matters is documentation, transferable warranty, and whether the repair addressed drainage and grading upstream of the foundation. A repaired foundation with a maintained perimeter is often a better bet than an original foundation with downspouts dumping at the corner.
Every one of these four frictions is answerable before an offer is written or accepted. If you are preparing to buy or list in Billings and want the disclosure statement, inspection sequence, and roof-and-insurance questions handled the right way the first time, Heidi Brosovich and the team at Brosovich Real Estate would be glad to walk you through it. Request a free home valuation and a pre-list disclosure review to see where your property stands before the market decides for you.
