Summary of New Requirements for Rental Housing Providers
On August 12, 2025, the Los Angeles County Board of Supervisors passed a groundbreaking ordinance establishing a maximum indoor temperature threshold for rental units.
This new ordinance amends Chapter 11.20 of the Los Angeles County Code to establish a maximum indoor temperature threshold for rental housing units to ensure tenant health and safety. It shifts “cooling” from a luxury amenity to a basic habitability requirement.
New Cooling Standards for Rental Housing in Unincorporated LA County
Under the newly established tenant protections, landlords in unincorporated Los Angeles County are now required to maintain a safe indoor climate for their residents. The core of this regulation mandates that all “habitable rooms“—which include primary living spaces such as bedrooms, living rooms, kitchens, and dining areas—must be kept at a temperature that does not exceed 82°F. This cooling requirement is designed to ensure tenant safety during increasingly frequent heatwaves and applies broadly across the region.
Whether you manage or reside in a single-family home, apartment complex, condominium, or Accessory Dwelling Unit (ADU), these standards are legally enforceable. It is important to note that the “habitable room” definition specifically focuses on areas where residents spend the majority of their time; therefore, non-living spaces such as bathrooms, hallways, and storage areas are excluded from this specific temperature mandate. Ensuring your rental property meets these Los Angeles County habitability standards is essential for remaining compliant with local housing laws and protecting community health.
Navigating New Cooling Standards: A Guide for Landlords and Tenants
As of September 12, 2025, significant shifts in tenant rights have redefined how cooling is managed in rental properties. Under these new regulations, landlords may no longer prohibit tenants from installing their own portable or window air conditioning units, provided the installations are code-compliant and do not cause structural damage. To stay compliant, tenants are required to provide five days’ written notice before installation and must ensure all units adhere to manufacturer safety guidelines. While this grants tenants more autonomy over their living environment, it also places the responsibility for any resulting damages firmly on the tenant, making professional installation and care more important than ever.
Understanding Electrical Capacity and Safety
From a technical standpoint, the feasibility of these portable or window air conditioning units depend heavily on your property’s electrical infrastructure. A standard 120V outlet is generally considered functional if it can support an AC unit without tripping the breaker. However, frequent “trips” serve as a clear warning of a circuit overload. Before expanding electrical capabilities, a professional load calculation is essential to determine if the existing sub-panel and busbar capacity can safely accommodate an additional 15–20 amp breaker. Landlords often face a choice between a “patchwork fix”—upgrading units individually as needs arise—or a global system upgrade. While the latter requires more upfront capital, it often proves more cost-effective regarding labor, permitting, and long-term property value.
Key Compliance Deadlines and Enforcement
Looking ahead, the timeline for full climate control compliance is structured to give property owners time to adapt. By January 1, 2027, full enforcement begins for most landlords, requiring all units to maintain a maximum temperature standard of 82°F.
For small property owners (those with 10 or fewer units), the transition is tiered:
- 2027–2032 Interim Period: Small owners must ensure at least one habitable room meets the 82°F cooling standard.
- January 1, 2032: This serves as the final deadline for small property owners to bring all habitable rooms into full compliance.
Flexible Compliance Methods for Indoor Cooling Standards
Navigating new cooling regulations doesn’t have to be a one-size-fits-all headache. Because the ordinance is performance-based, property owners have the creative freedom to determine the most cost-effective way to maintain an indoor temperature of 82°F or lower. Whether you prefer active cooling systems—such as high-efficiency air conditioning, heat pumps, or evaporative coolers—or a more sustainable approach, the choice is yours. Many landlords are finding success through passive cooling strategies, which include installing reflective roofing, high-grade insulation, window films, or blackout curtains to naturally lower ambient heat.
To ensure consistency and fairness, compliance is verified through a specific measurement standard: temperatures are recorded at the center of the room, exactly three feet above floor level.
Upgrading a property takes time and capital. If you are facing unique financial or technical hurdles, you may apply for a one-time, two-year extension. This grace period is designed to support owners who are actively making progress toward meeting the safety deadline but need a little more breathing room to get the job done right.
Enforcement, Penalties, and Cost Management
Maintaining a safe indoor climate is a critical component of tenant habitability, and oversight is managed strictly by the L.A. County Department of Public Health (DPH) through the Rental Housing Habitability Program (RHHP). Under these regulations, a failure to meet cooling standards is treated with the same level of urgency as a lack of essential services like heat or running water. Property owners who remain out of compliance risk significant administrative fines or placement in the Rent Escrow Account Program (REAP), which can lead to rent reductions and restricted access to rental income until the issues are resolved.
To support the robust inspection process required for these standards, a new per-unit fee (estimated at approximately $7.77 per unit) will be integrated into the existing RHHP fee structure. Regarding the financial investment for these upgrades, landlords should note that current regulations generally prohibit passing the direct costs of portable cooling equipment on to tenants. However, there is a pathway for cost recovery for more permanent solutions; property owners may seek standard capital improvement rent increases for permanent system upgrades, though these remain subject to established Rent Stabilization Ordinance and Rent Stabilization and Tenant Protections Ordinance limits.
Essential Action Steps for Property Owners
Preparing your property for the new cooling standards requires a proactive, technical approach to ensure both compliance and long-term electrical safety. The transition begins with a comprehensive Electrical Capacity Assessment. Before installing any new cooling equipment, it is vital to determine if your existing infrastructure can handle the increased load. We recommend scheduling an on-site evaluation with a licensed electrician to review critical property details, including unit counts, square footage, and current utility configurations.
Comprehensive Electrical Evaluation
A thorough inspection must scrutinize every level of your electrical system:
- Unit Sub-Panels: An electrician will verify if panels are from reputable brands (not under recall) and assess if the current amperage can handle additional cooling. They will also determine if the “home run” wiring from the main service to the sub-panel requires an upgrade or if firewall issues necessitate relocating the panels entirely.
- House Panels & Main Service: The backbone of your property’s power must be evaluated for condition and capacity. If your Main Service is insufficient, an upgrade will be required to manage the new electrical demand.
- Future-Proofing: This is also an ideal time to evaluate whether gas cooking appliances should be upgraded to electric to streamline your building’s energy profile.
Engineering and Approval Process
If a main service upgrade is deemed necessary, please be prepared for a multi-stage Engineering and Utility Review. This phase involves professional engineering to define the scope of work, followed by an on-site visit from the utility company. Note that this process—including permitting—currently takes several months to complete. Our team provides a full review, where our Field Supervisor evaluates the property and our owner walks you through every detail to find the best possible scenario for your investment.
Strategic Planning and Documentation
While electrical upgrades are underway, landlords should simultaneously evaluate passive cooling options. High-quality insulation and reflective roofing can significantly reduce the “thermal load” on your building, potentially allowing for smaller, less expensive AC units.
Additionally, stay responsive to your residents; while you must ensure all installations meet safety codes, do not unreasonably deny tenant requests for portable AC units. Throughout this entire process, it is crucial to document all efforts. Maintaining a detailed paper trail of inspections, quotes, and installations demonstrates your “good faith” progress toward compliance, which is essential if you ever need to apply for a hardship extension.
FAQs
What is the maximum indoor temperature allowed?
All rental housing units must be capable of maintaining a maximum indoor temperature of no more than 82°F in all habitable rooms.
When does this rule go into effect?
While the ordinance takes effect 30 days after final passage, official enforcement is scheduled to begin on January 1, 2027.
How is the temperature officially measured?
Compliance is determined by measuring the temperature at the center of the room, exactly three feet above floor level.
Can tenants install their own AC units?
Yes; landlords cannot prohibit tenants from installing their own portable cooling devices or non-mechanical methods (like blackout curtains) at their own expense.
What are tenant obligations before installing a cooling device?
Tenants must provide 5 calendar days’ written notice before installation (except for electric fans) and ensure the installation meets building codes and safety guidelines.
Can a landlord charge tenant for the cost of cooling equipment?
For “Fully Covered Rental Units,” landlords are prohibited from passing the cost of installing portable cooling equipment onto tenants as a capital improvement.
Are there different deadlines for small property landlords?
Small property landlords must have at least one habitable room meet the 82°F threshold by January 1, 2027, and all habitable rooms must comply by January 1, 2032.
Where does this ordinance apply?
This applies to unincorporated Los Angeles County and any cities that formally adopt this County Code.