Cal. Civ. Code § 70-26-109
Change Of Lease Terms By Notice
Operative Text
In all leases of lands or tenements or of any interest therein from month to month, the landlord may, upon giving notice in writing at least 15 days before the expiration of the month, change the terms of the lease to take effect at the expiration of the month. The notice, when served upon the tenant, shall of itself operate and be effectual to create and establish as a part of the lease the terms, rent, and conditions specified in the notice if the tenant shall continue to hold the premises after the expiration of the month.
Under Mont. Code Ann. § 70-26-109, a landlord renting property on a month-to-month basis has the legal ability to alter the terms of that tenancy — including rent and other conditions — by delivering written notice at least 15 days before the end of the current month. If the tenant remains in the property after that month expires, the new terms stated in the notice automatically become part of the lease by operation of law. No separate agreement or signature is required for the changes to take effect under this provision.
Plain English — not legal advice.
Mont. Code Ann. § 70-26-109 gives month-to-month landlords a straightforward mechanism to update lease terms, but timing and form matter: compliant operators generally ensure the written notice is served with enough lead time to clear the 15-day threshold before the month ends. Operators typically document the method and date of service to establish a clear record that the statutory requirement was met. Because the notice itself legally constitutes the new lease terms upon the tenant's continued occupancy, careful drafting of the notice — specifying every changed term, rent amount, and condition — is a standard practice.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Mont. Code Ann. § 70-26-109 means that a month-to-month tenant in Montana can receive a written notice that unilaterally changes rent or other lease conditions, and if the tenant stays past the end of that month, those new terms become legally binding without any further action. Tenants who receive such a notice generally have the option to vacate before the month expires to avoid being bound by the new terms. Tenants who believe a notice was improperly served, untimely, or otherwise defective may have grounds to contest whether the changes took effect — tenant-rights organizations or legal aid services can help evaluate the circumstances under this provision.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated October 22, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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