New 2027 Cooling Requirement for Los Angeles County Rentals: What Landlords Need to Know

As Los Angeles experiences hotter summer temperatures, cooling is becoming an increasingly important part of rental housing safety and habitability.

A new Los Angeles County ordinance will establish a maximum indoor temperature standard for certain rental properties beginning in 2027. For landlords and property managers, understanding the new requirement now can help avoid last-minute repairs, unexpected costs, and compliance issues.

At Strategic Growth Real Estate, we believe the best approach is simple: understand the rule, plan ahead, and address potential issues before they become problems.

What Is Changing in 2027?

Under the new Los Angeles County requirement, covered rental housing must be capable of maintaining an indoor temperature of 82°F or lower in habitable rooms.

The rule takes effect in 2025, but enforcement is scheduled to begin January 1, 2027, or later if the County's required fee has not yet been approved.

Importantly, this does not mean that every rental property must install central air conditioning. The requirement focuses on the indoor temperature standard, not on requiring one specific type of cooling system.

Who Does This Rule Apply To?

The County ordinance applies to rental housing in unincorporated areas of Los Angeles County and to cities that adopt the applicable County Code provisions. It does not automatically apply to every rental property located within Los Angeles County.

Because local rules can differ, landlords should confirm the jurisdiction of each property before assuming that the County requirement applies.

This is especially important for owners with properties in several cities.

What About Small Property Landlords?

The ordinance provides a longer timeline for certain Small Property Landlords.

Owners with 10 or fewer rental units, as defined by the County ordinance, have until:

January 1, 2027: At least one habitable room in each rental unit must be capable of maintaining 82°F or lower.

January 1, 2032: All habitable rooms must meet the 82°F standard.

For other covered properties, the 82°F standard applies to all habitable rooms beginning in 2027.

Does This Mean Every Property Needs Air Conditioning?

No.

This is one of the most important points for property owners to understand.

The County allows different approaches to cooling. Depending on the property, landlords may be able to use passive cooling strategies, portable cooling devices, or mechanical cooling systems to meet the required temperature.

Possible solutions may include:

• Window coverings and shades

• Improved ventilation

• Passive cooling improvements

• Portable air-conditioning units

• Window-mounted AC units

• Other appropriate mechanical cooling systems

The right solution will depend on the individual property and whether it can safely and legally maintain the required temperature.

What Should Landlords Do Now?

Although 2027 may seem far away, property owners should start preparing now.

1. Check Your Property's Jurisdiction

Determine whether the property is located in an unincorporated area of Los Angeles County or in a city that has adopted the applicable requirements.

2. Review Your Units

Identify units that may have difficulty staying cool, particularly upper-floor units, units with significant sun exposure, or properties with limited ventilation.

3. Consider Cooling Improvements

Look at simple improvements first, such as shades, window coverings, ventilation, and other passive cooling measures. Some properties may require portable or mechanical cooling.

4. Keep Good Records

Document inspections, maintenance, tenant complaints, repairs, and cooling improvements. Good records can help demonstrate that the property owner responded appropriately to potential habitability concerns.

5. Plan Your Budget

If cooling upgrades may be necessary, identifying them early gives owners more time to compare options, obtain contractor estimates, and plan capital expenses.

What About Winter?

While the new County requirement focuses on excessive indoor heat during warmer months, landlords should also remember that working heating facilities are an existing part of California's basic rental housing habitability standards.

As temperatures drop, property owners should make sure heating systems are working properly, address maintenance requests promptly, and keep records of inspections and repairs. A simple seasonal HVAC inspection can help identify problems before they become an emergency for tenants.

What About Tenants?

Tenants also have protections under the new ordinance.

The County allows tenants to use additional cooling methods when they are used safely and in compliance with applicable codes and requirements.

The ordinance also provides protections against eviction or retaliation for certain code-compliant cooling practices. Tenants experiencing excessive indoor heat should first notify their landlord or property manager and keep a record of the communication.

Can Landlords Pass Cooling Costs to Tenants?

Landlords should be particularly careful with this issue.

The County ordinance restricts passing certain portable cooling equipment costs on to tenants, and additional rules may apply to properties covered by the County's rent stabilization requirements.

Property owners should not automatically add cooling-related costs to rent without first confirming that the specific charge or rent adjustment is legally permitted.

For questions involving rent increases, capital improvements, or tenant cost-sharing, consulting a qualified California housing attorney is recommended.

The Bottom Line for Landlords

The new requirement is an important change, but it does not mean that every rental property needs a new central AC system.

The key requirement is the ability of covered rental units to maintain 82°F or lower in the applicable habitable rooms. The best solution will depend on the property, its condition, and the cooling methods available.

At Strategic Growth Real Estate, we recommend that multifamily owners take a proactive approach: check the property's jurisdiction, evaluate cooling conditions, document maintenance, and plan improvements early.

Preparing before 2027 can help property owners protect their investment while providing safer and more comfortable homes for their tenants.

Important Disclaimer

This article is intended for general informational and educational purposes only and does not constitute legal advice. Housing regulations may change, and requirements can vary depending on the property's location, type, ownership structure, and applicable local laws.

Property owners and tenants should verify the current requirements with the appropriate government agency and consult a qualified California housing attorney regarding questions involving a specific property, tenant, rent increase, cost recovery, or potential violation.

Conclusion

Los Angeles County's new indoor temperature standard is an important development for rental property owners and tenants.

The best time to prepare is before the rule is enforced. By reviewing properties now and understanding the available cooling options, landlords can approach 2027 with a clear plan instead of waiting until a problem occurs.

At Strategic Growth Real Estate, we help multifamily property owners stay informed, proactive, and prepared as rental housing requirements continue to evolve.

Summer: prepare for the 82°F cooling standard.

Winter: make sure existing heating systems are functioning properly.

Year-round: respond to habitability issues, document repairs, and stay current with local requirements.

Legal Disclaimer: This article is for general informational purposes only and does not constitute legal advice. Laws and regulations may change and may vary by property and location. Property owners and tenants should verify current requirements with the appropriate government agency or a qualified California housing attorney.

Sources

• Los Angeles County Department of Public Health — Indoor Temperature Requirements

• Los Angeles County Department of Public Health — Rental Housing Habitability Program

• Los Angeles County Board of Supervisors — Ordinance No. 2025-0032

• Los Angeles County County Counsel — Maximum Indoor Temperature Threshold Analysis