Cannabis & Marijuana Rental Rules in Montana 2026

Landlord ban authority, possession and home-grow limits, medical patient housing rules, and federal Section 8 restrictions in Montana.

Adult-Use Legal Effective 2021

1 oz Adult-use possession limit

4 plants Home cultivation

No Medical patient housing protection

Federal baseline (uniform in Montana): Cannabis remains a Schedule I controlled substance under 21 U.S.C. § 812(c) Schedule I(c)(10) regardless of Montana's legalization status. HUD PIH Notice 2014-21 (re-issued PIH 2017-13) requires Public Housing Authorities to deny admission to public housing or HCV (Section 8) for any household member illegally using a controlled substance, including cannabis. Landlords may prohibit smoking of any substance as a private property interest in any state.

Recreational marijuana has been legal for adults 21 and older in Montana since January 1, 2021, under the Marijuana Regulation and Taxation Act (MCA Title 16, Chapter 12). Unlike most states, Montana wrote landlords directly into the statute, and it cuts both ways. You keep broad authority to regulate marijuana on property you own or manage, but one specific tenant protection limits what your lease can forbid.

The controlling section is MCA 16-12-108(6): you may prohibit or otherwise regulate the consumption, cultivation, distribution, processing, sale, or display of marijuana on your property, except that a lease signed after January 1, 2021 may not prohibit a tenant from lawfully possessing and consuming marijuana by means other than smoking, unless a prohibition is required by federal law or to obtain federal funding. In plain terms: you can ban smoking and home-grow, but you cannot ban edibles or tinctures in a modern market-rate lease.

Montana Cannabis Legal Status

Montana is classified as Adult-Use Recreational Legal (effective 2021). The governing statute is Mont. Code § 16-12 (I-190, 2020).

Landlord Authority in Montana

Landlords retain ban authority.

Mont. Code § 16-12-108: landlord may prohibit smoking, vaporizing, and cultivation on rental property.

Montana's status: recreational and medical, with a landlord clause

Montana permits both medical and adult-use recreational marijuana. Adults 21+ may possess up to 1 ounce of usable marijuana. What makes Montana unusual for housing providers is that the legalization statute itself addresses rental property. MCA 16-12-108(6) confirms that nothing in the marijuana chapter stops a property owner, landlord, or manager from regulating or banning marijuana consumption, cultivation, sale, processing, or display on private property. That is a strong default in your favor, subject to the one lease-date carve-out described below.

Smoking you can ban; non-smoking use you generally cannot

The single tenant protection in MCA 16-12-108(6) is narrow but real. For any lease executed after January 1, 2021, you may not prohibit a tenant from lawfully possessing and consuming marijuana by means other than smoking, for example, edibles or tinctures, unless the prohibition is required by federal law or to obtain federal funding.

What survives that limit is significant. You may still ban smoking marijuana outright, the same way you would ban tobacco smoke, and a no-smoking clause covering cannabis is enforceable. You may also treat marijuana odor, smoke migration, and guest conduct like any other nuisance or lease violation. Draft the smoking prohibition explicitly so it is not read as an attempt to bar the protected non-smoking use.

Home cultivation: limited by statute and bannable by lease

Montana's personal grow rules live in MCA 16-12-106. An adult 21+ may cultivate up to 2 mature plants and 2 seedlings; a registered medical cardholder may grow 4 mature plants and 4 seedlings. A single private residence is capped at twice the per-person amount even when multiple adults live there. Plants and any marijuana over 1 ounce must be kept in a locked space and not visible from a public place by normal unaided vision. A grow that is visible or stored outside a locked space draws a civil fine of up to $250 and forfeiture.

For your lease, cultivation is not part of the protected non-smoking carve-out. Under 16-12-108(6) you may prohibit or restrict growing entirely, and most landlords should, given moisture, electrical load, mold, and odor risk. Commercial cultivation on a rental requires a notarized property-owner permission form under state Cannabis Control Division rules, so a licensed grow cannot proceed on your property without your written, notarized consent.

Section 8 and public housing: federal law controls

Marijuana is still a Schedule I controlled substance under the federal Controlled Substances Act, and that federal illegality is the reason Montana's non-smoking protection contains its escape hatch: it does not apply where a prohibition is required by federal law or to obtain federal funding.

If you accept HUD public housing subsidies or a Section 8 / Housing Choice Voucher, federal rules govern. HUD requires denial of admission and supports termination for marijuana use in public housing, and voucher program rules give housing authorities authority over marijuana-related tenancy decisions. In that context you may, and often must, prohibit all marijuana use, including the otherwise-protected non-smoking methods, notwithstanding the Montana carve-out. Coordinate any marijuana clause in a federally assisted unit with your public housing authority.

Practical lease drafting for Montana landlords

Build your Montana lease around three moves. First, include an explicit no-smoking clause that names marijuana alongside tobacco and vaping, this is fully enforceable. Second, prohibit or tightly restrict cultivation, sale, processing, and display, which the statute lets you control. Third, in market-rate housing, do not attempt a blanket ban on lawful non-smoking possession and use in a post-2021 lease, because 16-12-108(6) voids that restriction.

For federally assisted units, flip the analysis: a total prohibition is appropriate because federal funding requires it. Treat marijuana odor, damage, and disturbance under your standard nuisance and property-damage provisions so enforcement does not turn on the marijuana question alone.

Medical Patient Housing Rules in Montana

Montana does not have statewide medical patient housing protection.

Medical cannabis patients in Montana may be treated identically to recreational users by landlords. There is no state-law anti-discrimination requirement; the federal Schedule I framework controls. Some local jurisdictions may have ordinances providing limited protection, check the city or county where the rental unit is located.

Section 8 / HCV in Montana, The Federal Trap

HUD PIH 2014-21 mandatory denial applies in Montana. Even though Montana has legalized adult-use cannabis, a Public Housing Authority in Montana must deny admission to any household where a member illegally uses a controlled substance, and cannabis remains federal-illegal. Existing Section 8 tenants who use cannabis may face termination at PHA discretion, though termination is not mandatory like denial is.

The practical impact: a tenant holding a Housing Choice Voucher who tests positive for cannabis or self-discloses use during recertification can lose their voucher in Montana, regardless of any state cannabis legalization or medical card status. This is the single most common point of confusion for tenants in adult-use states.

Cannabis Rental Compliance in Major Montana Cities

City-level landlord risk profiles often track cannabis-related lease enforcement. View the eviction-risk and tenant-law profile for the largest Montana rental markets:

Billings Missoula Great Falls Bozeman Butte Helena

Sources & Methodology

Federal: 21 U.S.C. § 812 (Controlled Substances Act, Schedule I); HUD Public Housing Occupancy Notice PIH 2014-21 (re-issued PIH 2017-13); Sessions Memorandum (Jan 4, 2018).
Montana cannabis statute: Mont. Code § 16-12 (I-190, 2020).
Landlord ban authority: Mont. Code § 16-12-108: landlord may prohibit smoking, vaporizing, and cultivation on rental property.
Medical patient housing protection: Coded "No" for Montana based on the cited statute.

Related Guides for Montana Landlords

← Montana Eviction Risk Overview Lawful Eviction Reasons Section 8 / HCV Landlord Guide Landlord Insurance & Hazards Fair Housing Protected Classes Tenant Rights Summary

This page summarizes Montana's Marijuana Regulation and Taxation Act (MCA Title 16, Chapter 12), specifically the landlord provisions of MCA 16-12-108(6) and the personal cultivation limits and penalties in MCA 16-12-106, alongside the federal Controlled Substances Act baseline that governs Section 8 and public housing. Marijuana law changes and federal-assistance rules add complications; confirm current statute text and consult a Montana landlord-tenant attorney before drafting or enforcing a cannabis clause. This is general information, not legal advice.

Frequently Asked Questions

Can a Montana landlord ban marijuana smoking in a rental?

Yes. MCA 16-12-108(6) lets you prohibit or regulate marijuana on property you own or manage, and the statute's tenant protection covers only non-smoking use. A written no-smoking clause covering cannabis is enforceable in Montana.

Can a Montana lease ban all marijuana use?

Not in a standard market-rate lease signed after January 1, 2021. Under MCA 16-12-108(6) you cannot prohibit lawful possession and consumption by means other than smoking, such as edibles, unless a ban is required by federal law or to obtain federal funding. You can still ban smoking, cultivation, and sale.

Can a tenant grow marijuana in a Montana rental?

Only if the landlord allows it. State law (MCA 16-12-106) caps personal grows at 2 mature plants and 2 seedlings per adult (4 and 4 for a medical cardholder), in a locked space and not visible from a public place. But cultivation is not protected against a lease ban, so you may prohibit growing entirely under 16-12-108(6).

How does marijuana interact with Section 8 or public housing in Montana?

Federal law controls. Marijuana is still Schedule I under federal law, and Montana's non-smoking protection expressly yields where a prohibition is required by federal law or to obtain federal funding. HUD requires denial and supports eviction for marijuana use in public housing, and voucher rules give housing authorities discretion, so a full ban is appropriate in federally assisted units.

What are the penalties for an improper home grow in Montana?

Under MCA 16-12-106, cultivating plants visible from a public place or storing marijuana outside a locked space carries a civil fine of up to $250 plus forfeiture of the marijuana. Plants and any amount over 1 ounce must be locked and out of public view.

Is recreational marijuana legal in Montana?

Yes. Adult-use marijuana has been legal for people 21 and older since January 1, 2021 under the Marijuana Regulation and Taxation Act, codified in MCA Title 16, Chapter 12. Adults may possess up to 1 ounce of usable marijuana.

Federal authority: 21 U.S.C. § 812; HUD PIH 2014-21. State authority: Mont. Code § 16-12 (I-190, 2020). Last updated October 24, 2026. For informational purposes only, not legal advice. Cannabis law is rapidly evolving and federal/state conflict creates significant compliance risk; consult a licensed Montana attorney before making a lease, screening, or eviction decision involving cannabis.