Rental units in unincorporated Los Angeles County must be able to maintain an indoor temperature of no more than 82 degrees Fahrenheit under an ordinance the Board of Supervisors approved on August 12, 2025. Enforcement begins on January 1, 2027, or when a related county fee is approved, whichever occurs later. The ordinance sets a temperature result rather than mandating air conditioning, so owners may use insulation, window coverings, shade, and fans first, and install mechanical cooling only if those measures fall short.
Boutique Property Management is a residential property management company serving Los Angeles and Ventura County, and it manages residential properties of one to four units. This article explains what the ordinance requires, which properties it reaches, and how owners and tenants can prepare. It is general information and not legal advice, and owners with questions about their specific situation should consult a qualified attorney.
What does the LA County cooling ordinance require?
The ordinance requires that rental housing in covered areas be able to maintain a maximum indoor temperature of 82°F using safe, code compliant methods. According to the county’s Cool and Healthy Homes program, for most property owners the standard applies to every habitable room by January 1, 2027. California law has long required landlords to provide heating but has never required cooling, which makes this a notable shift in how habitability is defined locally.
The county added the standard to Chapter 11.20 of Title 11 of the Los Angeles County Code. Enforcement is handled by the Department of Public Health through the Rental Housing Habitability Program. A key point for planning is that the rule is performance based. An owner is not told which system to buy, only that the unit must be able to meet the temperature standard.
Does this apply to Los Angeles, Calabasas, Malibu, or Ventura County?
The ordinance applies directly only to rental housing in unincorporated Los Angeles County. Examples of unincorporated communities include Marina del Rey, Topanga, Altadena, Stevenson Ranch, and Castaic. Properties in incorporated cities such as Calabasas, Malibu, Santa Monica, and Beverly Hills are not covered unless the city separately adopts the county code or creates its own standard, and Ventura County properties are outside the ordinance entirely.
A Los Angeles mailing address does not settle the question, because many addresses that look like city locations sit in unincorporated territory. The county’s own materials note that cities may adopt the ordinance, and recent reporting indicates the Los Angeles City Council has asked city departments to study a similar requirement, though no citywide rule had been enacted at the time of that reporting. Owners should confirm jurisdiction by parcel, not by postal city, and should watch for local adoption in neighboring cities.
How are small property owners treated differently?
Small property landlords have a phased schedule. According to the county, they must bring at least one habitable room per unit to 82°F by January 1, 2027, and all habitable rooms by January 1, 2032. This matters to the owners of one to four unit properties that Boutique Property Management serves, because many of them will qualify.
Qualification is defined narrowly. The county describes a small property landlord as one who receives a homeowner’s property tax exemption on the property, or who controls only one rental property with no more than ten units, or who controls no more than three rental properties with a combined total of no more than ten units, including properties outside the county. The definition excludes real estate investment trusts, corporations, limited liability companies with at least one corporate member, and partnerships with at least one corporate partner. An owner who holds property through an entity should therefore verify the ownership structure before assuming the longer timeline applies.
What will compliance cost, and can landlords pass costs to tenants?
Costs depend on the building. Some units may meet the standard with window coverings, shade screens, weatherstripping, and added insulation, while others, particularly older units with poor ventilation or heavy sun exposure, may need mechanical cooling such as a heat pump or air conditioning. The county notes that the ordinance does not require electrical upgrades, but it strongly recommends that units be able to support portable cooling devices safely.
Cost recovery is limited. According to the county, landlords may not charge tenants for the cost of a portable or window cooling unit, and they may not raise rent or add fees because a tenant uses one. Costs of necessary retrofits fall under the county’s Rent Stabilization and Tenant Protections Ordinance, which caps rent increases and requires an application through the Department of Consumer and Business Affairs. Owners should also expect a modest regulatory cost, since a county board letter estimated a fee increase of about $7.77 per covered unit, subject to final approval.
The county points owners toward assistance, including technical support and rebates through Clean Power Alliance and other utility and state programs. Owners planning upgrades should investigate those programs before purchasing equipment.
What rights do tenants have under the ordinance?
Tenants in covered units may install portable cooling devices, such as plug-in air conditioners or fans, without being evicted, charged extra, or penalized. The county requires the tenant to give written notice at least five days before installation, and devices must be safe, code compliant, and must not alter the structure. The ordinance does not decide who pays the electricity needed to run cooling, a point raised by LA Public Press, and the county directs households to bill assistance programs such as CARE, FERA, and LIHEAP.
How will the rule be enforced, and can owners get more time?
Enforcement is complaint based. Once it begins, inspectors with the Rental Housing Habitability Program will investigate tenant complaints, and the county has said it will take an education first approach before pursuing fines or other actions. Owners of existing properties who cannot meet the standard through passive or portable methods by the enforcement date may request an extension of up to two years from the Department of Public Health. The request should explain the reason for the delay and provide a timeline for completing the work.
What should owners, buyers, and investors do now?
Owners should first confirm whether each property sits in unincorporated territory, then assess how each unit performs in hot weather, since that reveals which rooms are likely to exceed 82°F. Owners should document existing conditions, price low cost passive measures, and decide early whether any unit will need a retrofit or an extension request. Because the fee approval date affects when enforcement actually starts, owners should monitor county announcements, though planning around January 1, 2027 is the prudent course.
Buyers and investors considering unincorporated properties should add cooling capacity to their inspection and capital planning, particularly for older buildings with limited insulation or no existing mechanical cooling. Tenants should review their lease, notify their landlord in writing before installing a portable unit, and keep a copy of that notice.
Talk to Boutique Property Management About Your Rental Property
Preparing for a new habitability standard is easier with an experienced manager handling the details. Boutique Property Management, led by Allen Brodetsky, has more than two decades of experience managing one to four unit residential properties across Los Angeles and Ventura County, with award winning, concierge style service in both English and Spanish and five star ratings on Google and Yelp. To discuss how the 2027 cooling requirements may affect your property, contact Boutique Property Management at (818) 696-4498.