A month-to-month commercial lease in California renews automatically at the end of each rental period and stays in force until either the landlord or the tenant delivers written notice to end it. For most commercial tenants that notice period is 30 days. The tradeoff for the flexibility is exposure: rent, operating charges, and other terms can also change on 30 days’ notice, and commercial tenants get far fewer statutory protections than residential tenants, so the written agreement controls almost everything.
Ending the Tenancy
Either party can terminate a standard month-to-month commercial tenancy by giving the other at least 30 days’ written notice.1California Legislative Information. California Civil Code 1946 – Termination of Hiring of Real Property The length of the tenancy does not change that number. Three months in the space or three years, 30 days is the statutory floor for both sides.
The written notice should identify the property by its full address, state clearly that the tenancy is being terminated, and specify the date the tenancy will end. Send it by certified mail or another method that creates proof of delivery and a record of the date it was received. A notice that is vague about the termination date or the property being vacated can be challenged as defective, and that delays everything.
Longer Notice for Qualified Commercial Tenants
SB 1103, effective January 1, 2025, created a category called “qualified commercial tenants” with heightened protections. You qualify if your business is a microenterprise with five or fewer employees, a restaurant with fewer than ten employees, or a nonprofit with fewer than twenty employees, and you have given your landlord a written self-attestation of that status within the previous twelve months.2California Legislative Information. SB 1103 – Commercial Tenant Protections The self-attestation is easy to overlook, and it is what triggers the protections.
A landlord terminating a qualified commercial tenant’s month-to-month lease must give at least 60 days’ notice if the tenant has occupied the property for a year or more, and at least 30 days if the tenancy is shorter than a year.3California Legislative Information. California Civil Code 1946.1 – Termination Notice Requirements A qualified commercial tenant giving notice to the landlord still only needs to provide 30 days regardless of how long the tenancy has run.
Changing Rent and Other Terms
A landlord can change the terms of a month-to-month commercial lease, including the rent, by providing at least 30 days’ written notice before the change takes effect.4California Legislative Information. California Civil Code 827 – Changing Terms of Lease The notice must describe the new terms clearly enough that you know exactly what is changing and when. If you keep occupying the space after the effective date, the new terms automatically become part of your lease. If the new terms are unacceptable, your option is to serve your own 30-day termination notice and leave.
Qualified commercial tenants get a longer runway on steep rent increases. A landlord proposing a rent increase of more than 10 percent over any 12-month period must give a qualified tenant at least 90 days’ notice instead of 30.4California Legislative Information. California Civil Code 827 – Changing Terms of Lease An increase of 10 percent or less still requires only 30 days. The 10 percent threshold is cumulative: a 6 percent bump in March plus another 6 percent in September puts the second increase over the line and triggers 90 days’ notice.
What Your Written Agreement Has to Cover
Commercial tenancies do not come with the statutory defaults that residential tenancies do. If the lease is silent on something, that ambiguity will almost certainly be resolved in the landlord’s favor, so the written document has to do the work.
Rent, Due Date, and Late Fees
The lease should specify the exact rent amount, the due date, any grace period before a late fee applies, and the accepted payment methods. Because the landlord can change these on relatively short notice, having clear baseline terms in writing protects both parties when a dispute comes up.
Security Deposit
California does not cap security deposits for commercial properties. The amount is entirely negotiable, and landlords routinely ask for two to six months’ rent depending on the tenant’s credit profile and the condition of the space. Whatever the amount, the landlord can only apply it to unpaid rent, damage you caused, or cleaning the premises after you leave.5California Legislative Information. California Civil Code 1950.7 – Security Deposits for Other Than Residential Property
The landlord must return any unused portion within 30 days of getting the premises back, unless you agree to a different timeline in the lease.5California Legislative Information. California Civil Code 1950.7 – Security Deposits for Other Than Residential Property If the deposit exceeds one month’s rent plus last month’s rent and the landlord’s only claim is for unpaid rent, the excess beyond one month’s rent must come back within two weeks. If the landlord keeps your deposit in bad faith, you can recover up to $200 in statutory damages on top of what you are actually owed.
Permitted Use
The permitted use clause defines what business activities you can conduct on the property. A vague clause like “general commercial use” gives you broad latitude but can create friction with the landlord or with neighboring tenants. A narrow clause like “retail sale of clothing and accessories” prevents you from pivoting your business model without the landlord’s written consent. Make sure the language covers your actual operations and any reasonable expansion you anticipate.
Operating Expenses and Pass-Through Charges
Depending on the lease structure, you may pay a flat rent that includes taxes, insurance, and maintenance, or a lower base rent plus separate line items for those costs. If your lease includes pass-through charges, the agreement should spell out exactly which expenses qualify, how they are calculated, and when they are due. Without clear language limiting what counts as an operating expense, you could end up paying for capital improvements that primarily benefit the landlord. On a month-to-month arrangement, the landlord can also adjust these charges with 30 days’ notice, so pay attention to any provisions that allow estimated charges with a year-end reconciliation.
Maintenance and Repairs
There is no statutory default assigning maintenance duties in a commercial lease. Everything depends on what the document says. A gross lease typically makes the landlord responsible for structural components, the roof, and building systems while the tenant handles interior cosmetic upkeep. A triple net lease can shift nearly all maintenance to the tenant, including roof repairs and HVAC replacement. Read the maintenance provisions carefully and make sure they align with the rent structure you agreed to.
Right of Entry
California’s statutory rules for landlord entry apply only to residential properties. For commercial leases, the landlord’s right to enter your space is governed entirely by what the lease says. A well-drafted agreement will specify the circumstances that allow entry (inspections, repairs, showing the space to prospective tenants), the amount of advance notice required, and whether entry is limited to business hours. If the lease is silent, the landlord generally retains a right to enter for reasonable purposes with reasonable notice, but “reasonable” is vague enough to create conflict.
Insurance and Indemnification
Most commercial leases require you to carry general liability insurance and name the landlord as an additional insured. Minimum coverage is commonly at least $1 million per occurrence, though this varies by property type and risk profile. Businesses that handle food, chemicals, or heavy equipment should expect higher requirements.
Read the indemnification clause carefully. A typical version says you agree to compensate the landlord for losses arising from your business operations, your employees’ actions, or your failure to maintain the space. What is not reasonable is a clause that makes you responsible for losses caused by the landlord’s own negligence. If the clause uses phrases like “any and all claims related to the premises” without carving out the landlord’s own fault, push back before signing.
Hazardous Materials and Mold
Commercial leases almost universally prohibit bringing hazardous materials onto the premises without the landlord’s written consent. If your business uses chemicals, solvents, or other regulated substances, negotiate an exception for materials that are necessary for your operations and commonly used in your industry, provided you handle them in compliance with applicable laws. California law separately requires commercial tenants who discover mold in the building, HVAC system, or related structures to notify the landlord in writing within a reasonable time.6California Legislative Information. California Health and Safety Code 26142 – Mold Disclosure for Commercial Tenants
Required Accessibility Disclosure
Every commercial lease executed in California must include a written statement about whether the property has been inspected by a Certified Access Specialist (CASp) for compliance with disability access standards.7California Legislative Information. California Civil Code 1938 – Commercial Property Accessibility Disclosure The law does not require the landlord to actually get an inspection. It just requires disclosure of whether one has happened.
If the property has been inspected, the landlord must share the CASp report before you sign, and you get at least 48 hours to review it. If the report arrives less than 48 hours before signing, you have 72 hours after signing to rescind the lease based on what it says.7California Legislative Information. California Civil Code 1938 – Commercial Property Accessibility Disclosure Fixing accessibility violations identified in the report is presumed to be the landlord’s responsibility unless the lease says otherwise. ADA compliance lawsuits target commercial tenants as well as property owners, so the disclosure gives you real leverage to negotiate who bears that risk.
If Either Side Breaches
Your primary obligation is paying rent on time. Falling behind, even by a few days past any grace period, gives the landlord grounds to serve a three-day notice and begin the eviction process. You are also expected to comply with the permitted use clause, maintain whatever portions of the property the lease assigns to you, and report significant repair needs promptly. The landlord in turn must keep the property in a condition that allows you to operate, comply with building and fire codes, and refrain from unreasonably interfering with your business, sometimes called the right to quiet enjoyment.
Pre-Litigation Notices
When a tenant violates the lease, the landlord cannot go straight to court. California requires a written notice giving the tenant a chance to fix the problem or leave.
- Nonpayment of rent: the landlord serves a three-day notice demanding payment or possession. The notice must state the exact amount owed, the name and contact information of the person who can accept payment, and either a physical address for in-person payment or a bank account number for deposit. The three days exclude weekends and judicial holidays. For commercial tenancies, the stated amount can be a reasonable estimate as long as the notice clearly identifies it as such.8California Legislative Information. California Code of Civil Procedure 1161 – Unlawful Detainer9California Legislative Information. California Code of Civil Procedure 1161.1 – Commercial Rent Estimates in Unlawful Detainer
- Curable lease violation: a three-day notice to fix the violation or vacate. This covers breaches like unauthorized use of the premises or failure to maintain the space as required.
- Incurable lease violation: a three-day unconditional notice to vacate. This applies to situations like illegal activity on the premises.
A defective notice is the single most common reason commercial eviction cases get thrown out. If the three-day notice omits required information, states the wrong amount, or is delivered improperly, the resulting lawsuit can be dismissed and the landlord has to start over.
Unlawful Detainer
If a tenant does not comply with a valid notice and refuses to leave, the landlord’s only legal option is to file an unlawful detainer lawsuit in Superior Court. California prohibits landlords from changing locks, shutting off utilities, or removing a tenant’s property without a court order. Self-help eviction exposes the landlord to liability for the tenant’s damages.
Once served with the summons and complaint, the tenant has five days to file a written response. Those five days exclude Saturdays, Sundays, and judicial holidays, so the calendar time is closer to seven to nine days.10California Legislative Information. California Code of Civil Procedure 1167 – Summons in Unlawful Detainer If the tenant does not respond, the landlord can request a default judgment. If the tenant responds, the court sets a trial date. Unlawful detainer cases get priority on the court calendar, so trials happen faster than in ordinary civil cases. If the court rules for the landlord, it issues a writ of possession directing the sheriff to remove the tenant, and the sheriff posts a notice giving a final window to vacate voluntarily before a physical lockout.11California Courts. Eviction Cases in California An uncontested case can resolve in a few weeks. A contested case with a trial can take several months.