Los Angeles County’s 82-Degree Cooling Ordinance: A 2027 Landlord Compliance Guide

Los Angeles County’s new cooling ordinance establishes a maximum indoor temperature standard for covered rental housing in unincorporated areas of the county. Enforcement is scheduled to begin on January 1, 2027, or when the related enforcement fee receives final approval, whichever occurs later. With compliance potentially requiring electrical upgrades, new cooling equipment, permits, and access to occupied units, California landlords should start evaluating their properties well before the enforcement deadline.

Key Takeaways

Covered rental units must be capable of maintaining an indoor temperature of no more than 82°F in the applicable habitable rooms.
The Los Angeles County cooling ordinance applies directly to unincorporated areas of the county, not automatically to every incorporated city.
Enforcement begins January 1, 2027, or when the related County fee is approved, whichever occurs later.
Most covered landlords must meet the standard in every habitable room.
Qualifying Small Property Landlords initially need to meet the standard in at least one habitable room per unit, with all habitable rooms covered beginning January 1, 2032.
Owning 10 or fewer units does not automatically establish Small Property Landlord status.
The ordinance does not specifically require central air conditioning. Landlords may use any safe, code-compliant method that successfully maintains the required temperature.
Tenants generally must be allowed to install qualifying portable cooling devices at their own expense after providing five calendar days’ written notice.
Landlords should review their properties, cooling systems, electrical capacity, tenant procedures, and compliance records before enforcement begins.

Los Angeles County’s 82-Degree Cooling Ordinance: A 2027 Landlord Compliance Guide

Table of Contents

What Is the Los Angeles County Cooling Ordinance?
When Does Enforcement Begin?
Which Rental Properties Are Covered?
Does the Rule Apply in the City of Los Angeles?
What Is Considered a Habitable Room?
What Qualifies as a Small Property Landlord?
Does the Ordinance Require Air Conditioning?
What Cooling Methods Can Landlords Consider?
Rules for Tenant-Installed Cooling Devices
Tenant Protections and Landlord Restrictions
Who Pays for Cooling Equipment?
Two-Year Compliance Extensions
The Proposed County Enforcement Fee
How Landlords Can Prepare for 2027
Common Compliance Mistakes
Frequently Asked Questions

What Is the Los Angeles County Cooling Ordinance?

The Los Angeles County cooling ordinance establishes a maximum indoor temperature threshold for covered rental housing. Under the new standard, a rental unit must have a safe and code-compliant way to maintain a temperature of no more than 82°F in the rooms covered by the ordinance.

The rule is better understood as a temperature-performance requirement than as a universal air-conditioning mandate. The ordinance does not say that every landlord must install central air conditioning or use one particular type of equipment. Instead, it focuses on whether the applicable habitable rooms can actually remain at or below the maximum temperature.

This distinction is important for landlords evaluating older rental properties. A ceiling fan, window covering, or portable cooling device may reduce the temperature, but installing one of these items does not automatically establish compliance. The property’s cooling method must be capable of maintaining the required temperature when needed.

The official Los Angeles County ordinance also addresses tenant-installed cooling devices, temperature measurements, Small Property Landlords, tenant protections, cost pass-throughs, and possible compliance extensions.

When Does Enforcement Begin?

The ordinance became effective in 2025, but enforcement of the 82-degree rental requirement was delayed.

Enforcement is scheduled to begin on the later of these two events:

January 1, 2027
Approval of the fee needed to recover the County’s enforcement costs

This means landlords should not assume that January 1, 2027, is necessarily the final enforcement date. If the associated fee is approved after that date, enforcement would begin when the fee receives approval.

Los Angeles County’s Department of Public Health will administer and enforce the maximum indoor temperature requirement. Landlords should monitor the County’s Safe Maximum Temperature Threshold information for updated enforcement dates, procedures, forms, fees, and compliance guidance.

The delayed enforcement period gives rental housing providers time to inspect properties and plan improvements. However, owners of older buildings should not wait until the deadline approaches. Electrical upgrades, permits, equipment availability, contractor scheduling, and tenant coordination can significantly extend a cooling project’s timeline.

Which Rental Properties Are Covered?

The Los Angeles County cooling ordinance directly applies to covered rental housing in unincorporated Los Angeles County.

An unincorporated area is a community that is governed by the County rather than by an incorporated city. A rental property can have a Los Angeles or another familiar city name in its mailing address while still being located in an unincorporated area. Landlords should confirm the property’s actual governing jurisdiction instead of relying exclusively on its postal address.

Owners can begin by reviewing the parcel’s jurisdiction through County property records or contacting the appropriate local planning, building, or public health department.

Landlords with multiple properties should evaluate each address separately. One building may fall under the County ordinance, while another nearby building may be governed by an incorporated city with different rental housing rules.

Incorporated cities are not automatically included

The County ordinance does not automatically apply within every incorporated city in Los Angeles County. A city must separately adopt the cooling standard into its own health or municipal code before the County ordinance applies there.

For that reason, it would be inaccurate to say that every Los Angeles County landlord must currently meet the 82°F requirement. The applicable rule depends on the property’s precise location and whether its city has adopted its own maximum indoor temperature standard.

Landlords should periodically check for local developments, particularly as the 2027 County enforcement date approaches.

Does the Rule Apply in the City of Los Angeles?

The City of Los Angeles has considered adopting a maximum indoor temperature standard modeled after the County ordinance, but the County rule does not automatically apply inside City boundaries.

In September 2025, Los Angeles City Council members introduced a motion seeking to establish an 82°F maximum indoor temperature standard for rental housing. In February 2026, the City Council approved a motion directing City departments to study implementation, enforcement, costs, incentives, and related issues.

That action moved the proposal forward, but it did not itself enact the County ordinance within the City of Los Angeles.

Landlords with City of Los Angeles properties should continue monitoring official City Council and Los Angeles Housing Department announcements. Until a local ordinance is formally adopted, owners should distinguish between a proposal, a departmental study, and an enforceable rental housing requirement.

What Is Considered a Habitable Room?

The 82-degree rental requirement applies to “habitable rooms.” Under the applicable County code, a habitable room is generally a room used for living, sleeping, eating, or cooking.

Habitable rooms commonly include:

Bedrooms
Living rooms
Dining rooms
Kitchens
Other rooms designed for living or sleeping

Bathrooms, hallways, closets, storage rooms, and similar areas are generally not considered habitable rooms for this requirement.

Landlords should create a room-by-room inventory for every covered unit. This can help determine how many rooms must meet the temperature standard and whether the existing cooling method can serve them adequately.

An air conditioner in the living room, for example, may not effectively cool closed bedrooms. Except for the temporary Small Property Landlord phase-in, a system that keeps only one portion of the unit at 82°F may not be sufficient if the other habitable rooms exceed the threshold.

How will indoor temperature be measured?

The ordinance states that temperature measurements must be taken:

In the center of the habitable room
Three feet above floor level

This standardized location helps prevent measurements from being taken directly beside an air-conditioning vent, sunny window, exterior wall, or other spot that may not represent the room’s general temperature.

Landlords conducting their own evaluations should use the same measurement method. Records can identify the unit, room, date, time, indoor reading, outdoor conditions, cooling equipment in operation, and device used for testing.

What Qualifies as a Small Property Landlord?

The ordinance gives qualifying Small Property Landlords additional time before every habitable room must meet the 82°F standard.

Under the phase-in schedule, a qualifying Small Property Landlord must be able to maintain no more than 82°F in:

At least one habitable room per rental unit beginning with enforcement in 2027
All habitable rooms beginning January 1, 2032

This is a temporary phase-in, not a permanent exemption from the Los Angeles County landlord cooling requirements.

Ten or fewer units is not the only qualification

Owning 10 or fewer rental units does not automatically make someone a Small Property Landlord under the County code.

The ordinance incorporates the Small Property Landlord definition found in another section of the Los Angeles County Code. Qualification can depend on factors such as:

The owner’s total number of rental units
The number of rental properties owned, controlled, or beneficially held
Interests in rental property outside Los Angeles County
Whether the owner receives a homeowners’ property tax exemption
Whether the owner is an individual, corporation, partnership, trust, or limited liability company
Whether a business entity has corporate members or partners

Certain corporations, real estate investment trusts, partnerships, and limited liability company structures may not qualify.

Landlords should confirm their classification before planning around the 2032 deadline. An owner who incorrectly assumes that the phase-in applies could reach the enforcement date without a compliant solution for every habitable room.

Does the Ordinance Require Air Conditioning?

The Los Angeles County cooling ordinance does not require every landlord to install central air conditioning. It requires the landlord to provide a safe and code-compliant method capable of maintaining the applicable rooms at no more than 82°F.

Depending on the property, that method could involve mechanical cooling, passive heat reduction, or a combination of improvements.

The most important question is not whether the property has an air conditioner. The question is whether the chosen approach can reliably achieve the required indoor temperature.

A landlord could install a portable unit that is too small for the room, place a window air conditioner where it cannot reach adjoining rooms, or rely on fans that circulate air without lowering the temperature enough. Even though the property has cooling equipment, the result may not satisfy the standard.

Landlords should evaluate performance based on the building’s actual conditions, including room size, layout, insulation, windows, floor level, sun exposure, local climate, and electrical capacity.

What Cooling Methods Can Landlords Consider?

There is no single solution appropriate for every rental property. A newer building with efficient windows may require relatively modest improvements, while an older top-floor apartment may need mechanical cooling and electrical work.

Potential strategies include:

Central air-conditioning systems
Ductless mini-split systems
Heat pumps
Window-mounted air conditioners
Portable air-conditioning units
Evaporative coolers in suitable climates
Ceiling fans
Whole-house ventilation
Exterior shading
Heat-reducing window coverings
Approved window films
Solar screens
Attic or wall insulation
Air sealing
Cool-roof materials
Shade trees or code-compliant shade structures

Passive improvements can reduce heat gain and lower the amount of mechanical cooling required. For example, attic insulation, exterior shading, and better window coverings may help a cooling unit operate more effectively.

However, landlords should not assume that passive measures alone will maintain 82°F during extreme heat. Fans can improve comfort, but they generally move air rather than lower the room’s actual temperature. Window coverings may reduce solar heat but might not overcome high outdoor temperatures, poor insulation, or heat retained by the building.

Electrical capacity may determine the project scope

Older rental properties may not have circuits capable of supporting several air-conditioning units. Connecting cooling equipment to overloaded circuits can create safety problems and repeated power interruptions.

Before choosing equipment, owners may need to evaluate:

Available electrical service
Circuit capacity
Outlet locations
Dedicated circuit requirements
Panel condition
Equipment voltage and amperage
Whether electrical permits are required
Whether a utility service upgrade is necessary

A licensed contractor can help identify whether the proposed cooling method is compatible with the property. This assessment should occur early because electrical improvements may add substantial time and cost to the project.

Rules for Tenant-Installed Cooling Devices

The ordinance limits a landlord’s ability to prohibit tenants from installing or using qualifying cooling devices at the tenant’s own expense.

Covered devices and methods may include:

Portable air conditioners
Window-mounted air conditioners
Evaporative coolers
Blackout curtains
Window films
Shades
Other portable or nonmechanical cooling methods

The landlord generally may not prohibit or restrict the installation when it complies with building codes and applicable law, follows the manufacturer’s safety instructions, and does not require alteration or modification of the rental unit.

This does not mean tenants have unlimited authority to install any device in any manner. A landlord may still evaluate legitimate building-code, electrical, structural, security, drainage, and safety concerns.

Five calendar days’ written notice

Before installing a portable cooling device or qualifying nonmechanical cooling method, a tenant generally must give the landlord at least five calendar days’ advance written notice. The notice may be delivered electronically or through another written form.

A portable electric fan is excluded from this advance-notice requirement.

Landlords should establish a consistent procedure for receiving and reviewing these notices. A written response can:

Confirm receipt of the tenant’s notice.
Request the device specifications when reasonably necessary.
Identify legitimate safety or code concerns.
Explain any required installation conditions.
Arrange an inspection if appropriate.
Preserve a record of the communication.

A cooling device purchased by the tenant remains the tenant’s property. The tenant may also be responsible for damage caused by the installation or use of that device.

Practical safety issues to review

The five-day notice period gives landlords an opportunity to evaluate concerns such as:

Whether a window unit is properly secured
Whether the installation interferes with emergency egress
Whether the electrical circuit can support the equipment
Whether extension cords are prohibited by the manufacturer
Whether condensate will drain safely
Whether the device could damage windows or exterior finishes
Whether the installation violates a building code
Whether a permit or professional installation is required

Any restriction should be connected to an objective code, safety, manufacturer, or property-modification issue. A blanket lease provision prohibiting every window or portable air conditioner may conflict with the ordinance when applied to an otherwise qualifying device.

Tenant Protections and Landlord Restrictions

The ordinance includes protections for tenants who seek to use safe, code-compliant cooling methods or request compliance with the maximum indoor temperature requirement.

Landlords may not retaliate against or harass tenants for exercising rights covered by the ordinance. A permitted cooling installation should not be treated as an unauthorized alteration or independent basis for eviction merely because the landlord would prefer that the device not be used.

This does not prevent landlords from addressing actual lease violations, property damage, code violations, or unsafe installations. The owner should distinguish between a tenant’s protected cooling activity and a separate, well-documented safety concern.

Property managers and maintenance employees should receive clear instructions about the new requirements. A poorly worded response to a tenant’s cooling request can create unnecessary conflict, even when the property owner is attempting to investigate a legitimate concern.

A consistent written process helps landlords handle requests objectively and preserve a record of what was proposed, reviewed, approved, corrected, or denied.

Who Pays for Cooling Equipment?

Landlords are responsible for providing the method needed to bring covered units into compliance with the 82°F maximum indoor temperature standard. This may require owners to budget for equipment, installation, electrical work, permits, inspections, maintenance, repairs, and eventual replacement.

Tenants may purchase supplemental cooling devices at their own expense when the installation meets the ordinance’s requirements. A tenant-owned device, however, should not automatically be treated as a substitute for the landlord’s compliance obligation.

For example, if a tenant voluntarily buys a small portable air conditioner that cools only one bedroom, that does not necessarily establish that the landlord has provided a method capable of cooling every room covered by the ordinance.

Limits on passing installation costs to tenants

The ordinance states that installing a portable cooling device used to maintain the required temperature is not considered a capital improvement that may be passed through to tenants living in a “Fully Covered Rental Unit” under the relevant County code.

This restriction should not be broadened into a claim that every cooling-related cost is handled identically under every rental arrangement. Rent-control coverage, lease terms, utility responsibility, improvement type, and local regulations may affect how particular costs are treated.

Before adding a fee, seeking a rent adjustment, or treating cooling work as a capital improvement, landlords should confirm the property’s regulatory classification and the rules that apply to that particular expense.

Two-Year Compliance Extensions

Landlords of existing rental properties may be able to request additional time when the building cannot meet the maximum indoor temperature requirement through passive or portable cooling methods by the enforcement date.

The ordinance allows for an extension of up to two years in qualifying situations. An extension is not automatic, and landlords should not assume that an anticipated application allows them to delay preparation.

An owner considering an extension may need documentation such as:

Contractor evaluations
Mechanical or engineering reports
Electrical-capacity assessments
Permit applications
Equipment proposals
Cost estimates
Records of attempted temporary measures
Construction or installation schedules
Evidence of supply, utility, or permitting delays

County procedures may further define the application deadline, supporting evidence, approval criteria, and conditions attached to an extension. Owners should monitor official guidance and prepare supporting records before the standard becomes enforceable.

The Proposed County Enforcement Fee

Los Angeles County anticipates adding a per-unit fee to support administration and enforcement of the cooling ordinance. The preliminary estimate reported when the ordinance passed was $7.77 per unit, but that figure was subject to a cost study and final approval.

Landlords should treat $7.77 as an estimate rather than a confirmed recurring charge.

The final fee is particularly important because enforcement begins on January 1, 2027, or when the fee receives approval, whichever is later. Owners should monitor County notices for:

The final fee amount
Which properties must pay it
Billing procedures
Effective dates
Exemptions or adjustments
Enforcement commencement
Inspection and complaint procedures

How Landlords Can Prepare for 2027

Preparing for the Los Angeles County landlord cooling requirements should begin with jurisdiction and property classification. Buying equipment before answering those questions could lead to unnecessary spending or an incomplete compliance plan.

1. Confirm the property’s jurisdiction

Determine whether each property is in unincorporated Los Angeles County or within an incorporated city. Do not rely only on the mailing address.

If the property is inside a city, check whether that city has adopted its own cooling ordinance or announced a future compliance deadline.

2. Determine which units and rooms are covered

Create an inventory that identifies:

Every rental unit
Every habitable room
Existing cooling equipment
Window configuration
Sun exposure
Floor level
Approximate room size
Current electrical service
Known heat complaints

This inventory provides a foundation for contractor estimates and budgeting.

3. Confirm Small Property Landlord status

Owners who believe they qualify for the 2032 phase-in should document the facts supporting that classification. Review unit counts, property interests, entity structures, tax exemptions, and properties held outside the county.

Do not use the reduced phase-in schedule until eligibility has been confirmed.

4. Test current indoor temperatures

Measure applicable rooms in the center of the room, three feet above the floor. Tests should occur during conditions that can reveal the property’s actual heat exposure.

Document:

Property address
Unit and room
Date and time
Indoor temperature
Outdoor temperature
Cooling devices operating
Thermometer or sensor used
Any open doors or windows
Relevant weather conditions

A room that remains below 82°F on a mild day may perform very differently during a prolonged heat wave.

5. Evaluate passive improvements

Before selecting mechanical equipment, consider whether insulation, shading, window improvements, air sealing, or roof work can reduce cooling demand.

Passive improvements may lower equipment requirements and operating costs, but the finished solution must still maintain the required indoor temperature.

6. Inspect the electrical system

Arrange an electrical assessment if the property may need window units, portable air conditioners, mini-splits, heat pumps, or central cooling.

The evaluation should address whether the building can support the expected load safely and whether new circuits, outlets, panels, or utility improvements are needed.

7. Compare cooling options

Obtain multiple proposals when substantial work is necessary. Compare more than the initial purchase price.

Consider:

Cooling capacity
Number of rooms served
Installation cost
Electrical upgrades
Energy efficiency
Permit requirements
Noise
Maintenance
Expected service life
Replacement cost
Tenant access requirements
Exterior or structural impacts

8. Create a tenant-notice procedure

Landlords should establish a written process for tenant requests involving window air conditioners and other cooling methods.

The procedure should be easy for tenants and property managers to follow. It should explain where notices should be sent, what device information may be needed, when inspections may occur, and how safety concerns will be communicated.

9. Review lease language

Lease provisions addressing air conditioners, window installations, alterations, electrical equipment, and exterior appearance may need to be reviewed for consistency with the ordinance.

Broad prohibitions should not be enforced in a manner that prevents a protected, code-compliant cooling installation.

10. Maintain a property compliance file

A separate file for each property can include:

Jurisdiction verification
Room inventories
Temperature logs
Contractor reports
Equipment specifications
Permits
Inspection records
Invoices
Repair and maintenance records
Tenant notices
Written responses
Small Property Landlord documentation
Extension applications and decisions

Organized records can help an owner respond to complaints, inspections, equipment failures, and questions about prior work.

Common Compliance Mistakes

Assuming the ordinance applies everywhere in Los Angeles County

The County ordinance applies directly in unincorporated areas. Incorporated cities must separately adopt the standard.

Treating all owners with 10 or fewer units as exempt

Small Property Landlords receive a temporary phase-in rather than a full exemption, and unit count is only part of the eligibility analysis.

Assuming any air conditioner establishes compliance

The equipment must actually maintain the applicable rooms at no more than 82°F. An undersized or poorly located unit may not accomplish that result.

Testing only one room

Most covered landlords must meet the standard in every habitable room. Testing the living room does not establish that bedrooms or kitchens also comply.

Waiting for a tenant complaint

Older properties may require permitting, electrical improvements, contractor scheduling, and significant capital planning. Beginning only after a complaint can leave few practical options.

Prohibiting all tenant-installed cooling devices

The ordinance protects qualifying tenant installations when they are safe, lawful, consistent with manufacturer instructions, and do not modify the rental unit.

Relying on an extension before it is approved

A possible two-year extension is not automatic. The landlord must qualify, apply, and receive approval under the County’s procedures.

Treating the estimated fee as final

The initial $7.77 per-unit figure was an estimate. Owners should verify the fee adopted after the County’s cost study.

Frequently Asked Questions

Does every California landlord have to keep rental units below 82°F?

No. The 82°F standard discussed here is a Los Angeles County ordinance applicable to covered rental housing in unincorporated areas and any cities that separately adopt it. It is not a statewide California requirement for every rental property.

When will Los Angeles County begin enforcing the cooling ordinance?

Enforcement begins January 1, 2027, or when the related County fee is approved, whichever occurs later.

Does the ordinance apply in every city within Los Angeles County?

No. Incorporated cities are not automatically covered. Each city must adopt the ordinance or establish its own maximum indoor temperature requirement.

Does the cooling ordinance currently apply in the City of Los Angeles?

The County ordinance does not automatically apply inside the City of Los Angeles. The City Council has directed departments to study a similar standard, but owners should verify whether a City ordinance has been formally adopted before treating a proposal as current law.

Are landlords required to install central air conditioning?

Not necessarily. The ordinance requires a safe and code-compliant method capable of maintaining the applicable habitable rooms at no more than 82°F. It does not prescribe central air conditioning as the only solution.

Are landlords with 10 or fewer units exempt?

No. Qualifying Small Property Landlords receive a phased schedule. They must initially maintain at least one habitable room per unit at no more than 82°F and must meet the standard in all habitable rooms beginning January 1, 2032.

Can a tenant install a window air conditioner?

A landlord generally may not prohibit a tenant from installing a qualifying portable cooling device at the tenant’s expense when the installation complies with applicable laws, follows the manufacturer’s safety instructions, and does not alter or modify the unit.

How much notice must a tenant provide?

A tenant generally must provide at least five calendar days’ advance written notice before installing a portable cooling device or qualifying nonmechanical cooling method. Portable electric fans are excluded from this notice requirement.

Who owns a cooling device purchased by the tenant?

A cooling device acquired by the tenant at the tenant’s expense remains the tenant’s property.

Can the tenant be responsible for installation damage?

The ordinance provides that a tenant is responsible for damage caused by the tenant’s installation or use of a cooling method.

How is the room temperature measured?

Temperature measurements are taken in the center of the habitable room, three feet above floor level.

Can landlords receive additional time to comply?

Certain landlords of existing rental properties may request an extension of up to two years if the property cannot meet the requirement through passive or portable cooling methods by the enforcement date. The extension must be requested and approved.

Preparing Rental Properties for the New Cooling Standard

The Los Angeles County cooling ordinance gives landlords time to prepare, but some properties will require more than purchasing a portable air conditioner. Jurisdiction, room layout, building condition, electrical capacity, ownership classification, permits, and tenant access can all affect the compliance plan.

Landlords with covered properties should begin with a room-by-room assessment, test existing cooling performance, and identify improvements that can reliably maintain the required temperature. Early planning can provide more time to compare options, schedule contractors, complete permits, communicate with tenants, and address unexpected building limitations before enforcement begins.