Landlord ban authority, possession and home-grow limits, medical patient housing rules, and federal Section 8 restrictions in California.
California is one of the most cannabis-permissive states in the country, but that permissiveness runs to the tenant, not the tenancy. Recreational use has been legal for adults 21 and older since voters passed Proposition 64 in 2016, and medical use since Proposition 215 in 1996. What surprises many owners is that none of this stripped a landlord of the power to say no. State law that legalized cannabis went out of its way to preserve the property owner's authority to prohibit both use and cultivation on their premises. The catch is that authority only exists if you exercise it correctly, in writing, in the lease.
The practical framework for California owners breaks into three pieces: your right to ban smoking of any plant product under Civil Code 1947.5, your right to ban home cultivation under Health & Safety Code 11362.45 and Civil Code 1940.10(a)(3), and a separate, harder rule for any property that takes federal housing money, where marijuana is still flatly prohibited.
California is classified as Adult-Use Recreational Legal (effective 2016). The governing statute is Cal. Health & Safety Code § 11362.1 et seq. (Prop 64, 2016).
Cal. Civ. Code § 1947.5: landlord of residential premises may prohibit smoking of any substance, including cannabis. Medical use prohibition allowed.
Prop 64 lets any adult 21 or older possess and consume cannabis and grow up to 6 living plants per private residence, under Health & Safety Code 11362.1 and 11362.2. That is a right against the state, not against you. The same voter initiative added Health & Safety Code 11362.45, which expressly preserves "the rights and obligations of public and private property owners to prohibit or restrict" cannabis on their property. Separately, Civil Code 1940.10(a)(3), which otherwise protects a tenant's right to garden in personal containers, carves out marijuana and any other unlawful crop, so the cultivation-protection statute simply does not reach cannabis.
The upshot: a California landlord may prohibit growing, and may prohibit use, so long as the prohibition is in the rental agreement. Legalization changed the criminal law; it did not rewrite your lease for you.
Civil Code 1947.5 authorizes a landlord to prohibit smoking in any or all portions of a residential property, including individual units and common areas such as lobbies and hallways. Critically, the statute defines "smoking" to include inhaling or burning any plant product, which sweeps in cannabis alongside tobacco. If your lease bans "smoking," it already reaches marijuana smoke, but older leases that specify only "tobacco" should be updated so the clause is airtight.
Timing and notice matter. For any lease signed on or after January 1, 2012, where the tenant has not previously occupied the unit, the agreement must specify the areas where smoking is prohibited. For a tenant who was already in place when you adopt the ban, imposing it is a change of the terms of tenancy governed by Civil Code 827: give at least 30 days written notice, or 60 days if the tenant has occupied the unit for a year or more.
Enforcement in California is a drafting exercise. A defensible cannabis clause does four things: it prohibits smoking of any plant product (tracking the 1947.5 language rather than saying "tobacco"), it separately prohibits cultivation and processing of cannabis anywhere on the premises, it treats a violation as a material breach with a curable notice period, and it survives across renewals. Because smoking and growing are governed by different statutes, keep them as distinct provisions so that striking one does not weaken the other.
Two drafting notes owners miss. First, edibles and other non-combustion use are not "smoking," so a smoke-only ban leaves consumption intact unless you separately address it. Second, a home-grow ban should reference the plant count and locked-space rules so a tenant cannot argue the 6-plant allowance under state law overrides your contract, it does not.
Everything above assumes a conventional private rental. The analysis flips for any unit receiving federal assistance, public housing, project-based Section 8, or a Housing Choice Voucher. Under the federal Controlled Substances Act, marijuana remains a Schedule I substance with no legal medical use recognized federally, and California's legalization does not preempt federal law in these programs.
Per HUD guidance implementing the Quality Housing and Work Responsibility Act of 1998, a Public Housing Authority or assisted landlord must deny admission to any household with a member who is a current marijuana user, including medical users with a California recommendation. For existing residents, HUD gives the PHA discretion to decide case by case whether to terminate assistance for medical-marijuana use. There is no cannabis reasonable-accommodation right in federally assisted housing, so a compliant private-market lease clause is not enough here, federal prohibition controls.
Tenants sometimes assert a disability-accommodation right to use medical cannabis. In non-federal California housing, courts have generally upheld landlord smoking bans, and no California decision requires a landlord to permit cannabis smoking as a reasonable accommodation, secondhand smoke and property-damage concerns weigh heavily. Where accommodation analysis has any traction, it points toward non-combustion forms such as edibles or tinctures rather than a right to light up in the unit. In federally assisted housing, as noted, even that door is closed because federal law does not recognize medical marijuana at all.
Practical posture: ban the smoke, ban the grow, put both in writing, and treat any medical-use request as a case for documented, non-smoking accommodation rather than a blanket exemption from your lease.
Medical cannabis patients in California 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.
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 California, 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.
City-level landlord risk profiles often track cannabis-related lease enforcement. View the eviction-risk and tenant-law profile for the largest California rental markets:
This page reflects California statutory law as of 2026, including Proposition 64 (2016), Health & Safety Code 11362.1, 11362.2 and 11362.45, Civil Code 1947.5, 1940.10 and 827, and federal HUD guidance under the Quality Housing and Work Responsibility Act of 1998. Cannabis and housing rules change and local ordinances can add restrictions; confirm current requirements with the governing code sections or a California landlord-tenant attorney before drafting or enforcing a clause. This is general information, not legal advice.
Yes. Prop 64 and Health & Safety Code 11362.45 expressly preserve a property owner's right to prohibit cannabis use and cultivation on their property. Legalization removed criminal penalties under state law; it did not override your lease. The ban must be written into the rental agreement to be enforceable.
Civil Code 1947.5. It authorizes prohibiting smoking in any or all of the property, including units and common areas, and defines smoking to include burning any plant product, which covers cannabis. Leases signed on or after January 1, 2012 for a new occupant must specify where smoking is banned.
State law allows up to 6 living plants per private residence in a locked space not visible from a public place. But Civil Code 1940.10(a)(3) excludes marijuana from tenant cultivation protections and Health & Safety Code 11362.45 lets owners prohibit cultivation. A no-grow lease clause controls over the 6-plant allowance.
Yes, but it is a change of the terms of tenancy under Civil Code 827. You must give at least 30 days written notice, or 60 days if the tenant has lived in the unit for a year or more, before the smoking ban takes effect.
No. Marijuana remains a Schedule I substance under the federal Controlled Substances Act, and HUD rules under the 1998 QHWRA bar admission of marijuana users, including medical users, to federally assisted housing. For existing residents, the housing authority has case-by-case discretion. State legalization does not preempt federal law here.
In private California housing, courts have generally upheld smoking bans and no ruling requires allowing cannabis smoking as a reasonable accommodation. Any accommodation analysis leans toward non-smoking forms like edibles. In federally assisted housing, there is no medical-cannabis accommodation right at all.
Federal authority: 21 U.S.C. § 812; HUD PIH 2014-21. State authority: Cal. Health & Safety Code § 11362.1 et seq. (Prop 64, 2016). Last updated August 17, 2026. For informational purposes only, not legal advice. Cannabis law is rapidly evolving and federal/state conflict creates significant compliance risk; consult a licensed California attorney before making a lease, screening, or eviction decision involving cannabis.
