California Commercial Lease Laws: Complete Guide for Property Owners
Complete overview of California commercial property laws including SB 1103 tenant protections, security deposits, eviction, NNN leases, and Prop 13.
Legal Disclaimer
This content is for general informational and educational purposes only. It does not constitute legal advice and should not be relied upon as such. Laws change frequently — always verify current regulations and consult a licensed attorney in your jurisdiction for advice specific to your situation. Landager is a property management platform, not a law firm.Information last verified: May 2026.
California's commercial lease legal environment is primarily governed by the California Civil Code (enacted March 21, 1872) and has undergone significant changes with the enactment of SB 1103 (Commercial Tenant Protection Act) and AB 2347, both effective January 1, 2025. These laws introduce new protections for small commercial tenants while maintaining California's broadly contract-driven approach to commercial leasing.
Key California Commercial Lease Laws at a Glance
Official Law Citation: The rules and regulations outlined on this page are strictly configured under the official California Civil Code § 1925 et seq. and Code of Civil Procedure § 1161. Landlords must always ensure their lease agreements directly adhere to these state codes.
SB 1103: Qualified Commercial Tenants (QCTs)
Starting January 1, 2025, certain small commercial tenants qualify for enhanced protections under SB 1103. A tenant qualifies as a Qualified Commercial Tenant (QCT) if they are:
- A microenterprise - 5 or fewer employees, including the owner
- A restaurant - fewer than 10 employees
- A nonprofit - fewer than 20 employees
QCTs must provide written self-attestation of their status upon lease execution and annually thereafter. Protections include enhanced notice requirements for rent increases (CIV § 827) and lease terminations (CIV § 1946.1), required lease translations (CIV § 1632.1), and transparency restrictions on operating cost charges (CIV § 1950.9).
For more detail, see our Commercial Rent Increases and Commercial Lease Requirements guides.
Common Lease Structures
Gross (Full-Service) Lease
Common in Class A office buildings. Landlord includes most operating expenses in the rent.
Modified Gross Lease
Tenant pays a portion of operating expenses (often utilities and janitorial). Common in multi-tenant office and light industrial spaces.
Triple Net (NNN) Lease
Tenant pays base rent plus property taxes, insurance, and CAM charges. Standard for retail, industrial, and single-tenant properties.
Percentage Lease
Base rent plus a percentage of gross revenue. Common in shopping centers.
Security Deposits
California Civil Code § 1950.7 governs commercial security deposits. There is no statutory cap on the deposit amount, and landlords must return the deposit within 30 days of receiving possession. Unlike residential deposits, commercial deposits do not require interest payments or itemized deduction statements (unless the lease requires it).
For more detail, see our Commercial Security Deposits deep dive.
Eviction Process
California uses the unlawful detainer process for commercial evictions, adjudicated in the Superior Court of California. As of 2025 (AB 2347), commercial tenants now have 10 business days (up from 5) to respond to an unlawful detainer complaint per CCP § 1167. Self-help evictions are strictly prohibited.
For more detail, see our Commercial Eviction Process guide.
Maintenance and Repairs
There is no implied warranty of habitability for commercial properties. Maintenance is entirely governed by the lease contract. NNN tenants bear most responsibilities; gross lease landlords handle the majority.
For more detail, see our Commercial Maintenance Obligations guide.
Getting Started with Compliance
California's rapidly evolving commercial tenant protections - especially the SB 1103 QCT framework - make compliance management more complex than ever. Landager helps commercial landlords track QCT certifications, manage notice periods, and stay compliant with California's unique regulatory legal environment.
Explore more California commercial compliance topics:
Sources & Official References
- California Civil Code §§ 1925-1954.06 - Hiring of Real Property
- California Civil Code § 1950.7 - Commercial Security Deposits
- California Civil Code § 1950.9 - Commercial Operating Cost Disclosures
- California Code of Civil Procedure § 1167 - Summons and Response Time
- California Civil Code § 827 - Notice of Rent Increase
Frequently Asked Questions
▶What are the California landlord-tenant laws every property owner should know?
California landlord-tenant law is governed primarily by Civil Code §1940–1954.06 and the Tenant Protection Act (AB 1482). Key requirements include a one-month security deposit limit (effective July 2024), statewide rent caps of 5% + CPI or 10% (whichever is lower), just-cause eviction protections for tenancies over 12 months, mandatory habitability standards, and extensive disclosure requirements. Non-compliance can result in statutory penalties and punitive damages.
Read the complete guide▶What is the California eviction process and how long does it take?
California distinguishes between at-fault and no-fault evictions. For unpaid rent, landlords serve a 3-Day Notice to Pay or Quit. For lease violations, a 3-Day Notice to Cure or Quit is required. No-fault evictions require 30 days notice for tenancies under one year, or 60 days for longer tenancies, plus relocation assistance equal to one month's rent under AB 1482. After notice expires, an Unlawful Detainer lawsuit is filed, and the full court process typically takes 5-8 weeks.
Read the complete guide▶What is the California security deposit limit in 2026?
As of July 1, 2024, California limits security deposits to one month's rent for all residential properties, regardless of whether the unit is furnished or unfurnished — eliminating the previous two-month limit. Landlords must return the deposit within 21 days of move-out with an itemized statement of deductions. Allowable deductions include unpaid rent, cleaning beyond normal wear and tear, and repair of tenant-caused damage.
Read the complete guide▶What are the California rent increase laws and caps for landlords?
Under AB 1482 (the Tenant Protection Act), most California residential properties are subject to annual rent caps of 5% plus the local Consumer Price Index (CPI), or 10%, whichever is lower. Landlords must provide 30 days written notice for increases of 10% or less, and 90 days for increases above 10%. Exemptions include properties built within the last 15 years, certain single-family homes, and owner-occupied duplexes.
Read the complete guide▶What is the grace period for late rent in California?
California does not mandate a statutory grace period for late rent — technically, rent is late the day after it is due. However, most leases include a 3-5 day contractual grace period. Late fees must be reasonable and reflect the landlord's actual costs from the delay. A 3-Day Notice to Pay or Quit cannot be served until rent is actually past due, and courts may reject excessive late fee provisions as unenforceable penalties.
Read the complete guide▶What disclosures must California landlords provide to tenants?
California requires extensive pre-lease disclosures including: lead-based paint warnings (pre-1978 buildings), Megan's Law sex offender database notice, bed bug history, mold hazards, proximity to former military ordnance locations, flood zone status, and any known environmental hazards. Landlords must also disclose the property's demolition or renovation history and provide contact information for the property owner or authorized agent.
Read the complete guide▶What are the California lease requirements for rental properties?
While oral leases are technically valid for terms under one year, California strongly favors written agreements. Required lease elements include rent amount and due date, security deposit terms, maintenance responsibilities, and rules regarding pets, smoking, and subletting. Lease terms must comply with AB 1482 just-cause eviction protections, and any waiver of tenant rights in the lease is void and unenforceable.
Read the complete guide▶What are California landlord maintenance obligations and habitability standards?
Under California's implied warranty of habitability, landlords must maintain properties in fit and livable condition. This includes working plumbing, heating, electrical systems, weatherproofing, clean common areas, functioning locks and windows, and pest control. If a landlord fails to make necessary repairs within 30 days of written notice, tenants may use the 'repair and deduct' remedy (up to one month's rent) or withhold rent entirely until conditions are corrected.
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