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MT · Flood-disclosure law

Does a Montana seller have to disclose flooding?

Montana is no longer caveat-emptor for residential sales: under MCA 70-20-502 (enacted by Ch. 375, Laws of 2023) a seller must give the buyer a written statement disclosing any adverse material facts about the residential property of which the seller has actual knowledge; the list covers general items such as standing water and drainage but there is no statewide flood-specific item.

Montana at a glance

General disclosure

A general property-condition disclosure captures flooding through a water/drainage or known-defect item, but has no dedicated flood-zone question.

DisclosureRequired
Opt-outYes — caution
Primary-source verified· verified June 16, 2026
Mont. Code Ann. § 70-20-502 (also §§ 70-20-501, -503, -504, -505; enacted by Ch. 375, Laws of 2023)

The 4-card answer

Montana flood-disclosure, decoded

Whether the seller must disclose, what triggers it, the penalties, and any opt-out gotcha — each card cites its source.

Does the seller have to disclose flooding?

Disclosure required

General disclosure

Montana is no longer caveat-emptor for residential sales: under MCA 70-20-502 (enacted by Ch. 375, Laws of 2023) a seller must give the buyer a written statement disclosing any adverse material facts about the residential property of which the seller has actual knowledge; the list covers general items such as standing water and drainage but there is no statewide flood-specific item.

A general property-condition disclosure captures flooding through a water/drainage or known-defect item, but has no dedicated flood-zone question.

Mont. Code Ann. § 70-20-502 (also §§ 70-20-501, -503, -504, -505; enacted by Ch. 375, Laws of 2023)Primary-source verified· verified June 16, 2026

What triggers the duty

  • Any transfer of residential real property in Montana (subject to exemptions in MCA 70-20-503).
  • Disclosure limited to adverse material facts of which the seller has ACTUAL knowledge.
  • Statement must be provided prior to or contemporaneously with execution of the purchase contract.
  • Flood/floodplain-specific disclosure is imposed only by some county ordinances (e.g., Missoula County, Butte-Silver Bow), not by the statewide statute.

Penalties & remedies

Not specified as a statutory civil penalty. The statute provides a buyer rescission right (MCA 70-20-504); MCA 70-20-505 states the disclosure is not a warranty and shields a seller for good-faith reliance on reliable third-party/governmental information. Misrepresentation or concealment of a known adverse material fact can support common-law liability, and licensees face Board of Realty Regulations discipline.

Buyer remedy: Primary statutory remedy is rescission: unless the parties agree otherwise in writing, a contract is not effective until 3 days after the buyer receives the disclosure statement, and the buyer may withdraw/rescind within that period without penalty (MCA 70-20-504). Common-law fraud/misrepresentation remedies may also apply.

Opt-out gotchas

An opt-out / waiver exists. Parties may agree in writing to alter the default timing/rescission framework ('unless the buyer and seller have otherwise agreed in writing'); certain transactions are statutorily exempt under MCA 70-20-503. The underlying duty to disclose known adverse material facts is statutory.

Research note ▾

CORRECTION to common assumption: Montana is NOT currently a no-mandatory-disclosure / caveat-emptor state for residential sales. The 2023 Legislature (Ch. 375) created MCA 70-20-502 et seq., a mandatory seller disclosure of actual-knowledge adverse material facts. Operative text confirmed directly from the primary Montana legislature site (mca.legmt.gov): itemized topics include water intrusion, wells/septic, structural systems, hazardous materials, pest infestations, and 'problems with settling, soil, standing water, or drainage.' No statewide flood- or floodplain-specific line item, so disclosure_level='limited'. Flood/floodplain-specific mandates exist only at county level. 70-20-505 confirmed (primary); 70-20-504 confirmed via search — 3-day buyer rescission right. Effective date tied to Ch. 375, Laws of 2023 (commonly cited Oct. 1, 2023) not pinned from primary source.

Buyer's rights

If you're buying in Montana

Your rights re-framed from the buyer's side, plus a pre-closing checklist that holds in every state.

What Montana law gives you as a buyer

Montana requires a seller disclosure (see the answer cards), so you have a statutory document to rely on — and a remedy if the seller knowingly withheld a material flood fact. Primary statutory remedy is rescission: unless the parties agree otherwise in writing, a contract is not effective until 3 days after the buyer receives the disclosure statement, and the buyer may withdraw/rescind within that period without penalty (MCA 70-20-504). Common-law fraud/misrepresentation remedies may also apply.

Watch the opt-out: Parties may agree in writing to alter the default timing/rescission framework ('unless the buyer and seller have otherwise agreed in writing'); certain transactions are statutorily exempt under MCA 70-20-503. The underlying duty to disclose known adverse material facts is statutory.

Mont. Code Ann. § 70-20-502 (also §§ 70-20-501, -503, -504, -505; enacted by Ch. 375, Laws of 2023)

Your pre-closing checklist (works in every state)

  • Pull a free FEMA flood-zone lookup

    Enter the address on FEMA's Flood Map Service Center to see the property's flood-zone designation (Special Flood Hazard Area = Zone A/V). This is public and free, regardless of what the seller discloses.

    msc.fema.gov ↗

  • Request a CLUE / loss-history report

    A C.L.U.E. (Comprehensive Loss Underwriting Exchange) report shows insurance claims filed on the property in the last ~7 years, including water and flood claims. The current owner can pull theirs free once a year from LexisNexis.

    LexisNexis consumer disclosure ↗

  • Get an independent inspection — ask about water

    Hire your own inspector and specifically flag drainage, grading, sump pumps, and signs of past water intrusion (staining, efflorescence, fresh paint in basements). An inspection contingency protects you if problems surface.

  • Get a flood-insurance quote before you waive contingencies

    Quote NFIP or private flood coverage early. Homeowners' insurance does NOT cover flood damage. A federally backed mortgage on a property in a Special Flood Hazard Area generally requires flood insurance — budget for it.

    floodsmart.gov ↗

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Montana

Does the seller have to disclose flooding?

Disclosure required

General disclosure

Montana is no longer caveat-emptor for residential sales: under MCA 70-20-502 (enacted by Ch. 375, Laws of 2023) a seller must give the buyer a written statement disclosing any adverse material facts about the residential property of which the seller has actual knowledge; the list covers general items such as standing water and drainage but there is no statewide flood-specific item.

A general property-condition disclosure captures flooding through a water/drainage or known-defect item, but has no dedicated flood-zone question.

Mont. Code Ann. § 70-20-502 (also §§ 70-20-501, -503, -504, -505; enacted by Ch. 375, Laws of 2023)Primary-source verified· verified June 16, 2026

What triggers the duty

  • Any transfer of residential real property in Montana (subject to exemptions in MCA 70-20-503).
  • Disclosure limited to adverse material facts of which the seller has ACTUAL knowledge.
  • Statement must be provided prior to or contemporaneously with execution of the purchase contract.
  • Flood/floodplain-specific disclosure is imposed only by some county ordinances (e.g., Missoula County, Butte-Silver Bow), not by the statewide statute.

Penalties & remedies

Not specified as a statutory civil penalty. The statute provides a buyer rescission right (MCA 70-20-504); MCA 70-20-505 states the disclosure is not a warranty and shields a seller for good-faith reliance on reliable third-party/governmental information. Misrepresentation or concealment of a known adverse material fact can support common-law liability, and licensees face Board of Realty Regulations discipline.

Buyer remedy: Primary statutory remedy is rescission: unless the parties agree otherwise in writing, a contract is not effective until 3 days after the buyer receives the disclosure statement, and the buyer may withdraw/rescind within that period without penalty (MCA 70-20-504). Common-law fraud/misrepresentation remedies may also apply.

Opt-out gotchas

An opt-out / waiver exists. Parties may agree in writing to alter the default timing/rescission framework ('unless the buyer and seller have otherwise agreed in writing'); certain transactions are statutorily exempt under MCA 70-20-503. The underlying duty to disclose known adverse material facts is statutory.

Research note ▾

CORRECTION to common assumption: Montana is NOT currently a no-mandatory-disclosure / caveat-emptor state for residential sales. The 2023 Legislature (Ch. 375) created MCA 70-20-502 et seq., a mandatory seller disclosure of actual-knowledge adverse material facts. Operative text confirmed directly from the primary Montana legislature site (mca.legmt.gov): itemized topics include water intrusion, wells/septic, structural systems, hazardous materials, pest infestations, and 'problems with settling, soil, standing water, or drainage.' No statewide flood- or floodplain-specific line item, so disclosure_level='limited'. Flood/floodplain-specific mandates exist only at county level. 70-20-505 confirmed (primary); 70-20-504 confirmed via search — 3-day buyer rescission right. Effective date tied to Ch. 375, Laws of 2023 (commonly cited Oct. 1, 2023) not pinned from primary source.

Summary of Montana law as of June 2026. Not legal advice.

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