LA County's New 82-Degree Cooling Rule: What It Really Means for Apartment Owners

If you own an apartment building, or other multifamily property in unincorporated LA County, there's a new rule with your name on it - and it comes with a deadline.

In August 2025, the LA County Board of Supervisors voted 5-0 to pass a first-of-its-kind cooling ordinance which requires every habitable room in every rental unit must be able to stay at or below 82 degrees Fahrenheit. Enforcement kicks in January 1, 2027.

Now, in simple terms: the county has already told you how warm your units have to be in winter. Now it's telling you how cool they have to be in summer.

What the rule actually requires

The ordinance doesn't technically mandate air conditioning. You can technically get there with passive cooling - shades, window films, ventilation. But here's the thing: if your units still run hot after you've exhausted the passive options, the county can require mechanical cooling. That means AC units or heat pumps. In a 1920s or 1950s building that was never wired for it, that may not be a small line item - that might be an electrical panel conversation.

A few more pieces you should know:

• Tenants can now install their own portable AC units. You can't stop them or charge them extra. If your building's electrical system can't safely handle a window unit in every apartment, that's now your problem to think about.
• Small owners get more runway. If you own 10 or fewer units as an individual (not an LLC or corporation), you need one compliant room per unit by 2027 and all rooms by 2032. Everyone else: all rooms by 2027.
• Extensions exist, but they're not free passes. If you can't comply by the deadline, you can apply for up to two more years, but the obligation doesn't go away. It just gets postponed.
• There's a new fee coming. The county is adding a charge on top of the existing Rental Housing Habitability Program fee to pay for new inspectors. Yes, you'll be funding your own enforcement.

Why this matters beyond unincorporated LA County

Right now this applies to unincorporated areas: East LA, Florence-Firestone, Walnut Park, etc. But LA County just became the first jurisdiction in the region to do this, and the City of LA has a long track record of following the county's lead on tenant protections. If your building sits inside city limits, don't assume you're permanently off the hook. This is likely the direction things are moving.

The real question for long-term owners

If you've owned your building for 15, 20, 30 years, you've watched the list grow: seismic retrofits, RSO caps, eviction rules, habitability inspections - and now a temperature mandate with capital costs attached. Each rule on its own is manageable. Stacked together, they change the math on holding.

So the question worth asking is simple: does it still make sense to keep carrying this building, or is this the moment to take your equity and be done with the compliance treadmill?

There's no wrong answer. But you should know your number before you decide.

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