Title 24 Reports in Anaheim
All 7 of Anaheim's ZIP codes are climate zone 8, Anaheim Hills included. What changes the zone in Orange County is not elevation — it is how far you are from the ocean.
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The hills do not change the zone
The most common assumption we correct on Anaheim projects is that Anaheim Hills must be a different climate zone from the flat west end of the city. It is not. 92807 and 92808 both carry zone 8, the same as 92801 near the Disneyland Resort. The Energy Commission is grouping areas by heating and cooling demand, and a few hundred feet of elevation inside one inland city does not produce a different demand profile.
This matters mainly because it removes a question. A report for a hillside lot and a report for a flat lot in Anaheim are modelled against the same zone 8 requirements, so nothing about the location changes which targets the design has to reach.
What does change it is the coast
Orange County is split between two zones, and the boundary runs roughly parallel to the shoreline rather than along any city or county line. Westminster (92683) is zone 6. Garden Grove (92840), immediately inland of it, is zone 8 — the same as Anaheim. Two adjacent cities, two zones, because one sits inside the marine layer's reach and the other does not.
The coastal side holds Huntington Beach, Fountain Valley, Costa Mesa and Newport Beach, all zone 6. The inland side holds Anaheim with Fullerton and Orange, all zone 8. A project brief that says "Orange County" has therefore not yet said which requirements apply.
Why zone 8 is not zone 6
Zone 8 runs warmer in summer and sees a wider daily swing than the coastal strip, so cooling load and solar heat gain through glazing carry more weight in the calculations. A west-facing glass wall that models comfortably in Westminster can fail the same check in Anaheim. It is the single most common reason a design copied from a coastal project needs reworking here.
Permitting through the Building Division
Work inside the city limits is permitted through the City of Anaheim Building Division, which checks the energy compliance forms against the drawings submitted with them. The forms have to describe the building actually shown on the plans — mismatched window schedules between the plan set and the report are the correction we see most often.
Common Title 24 Questions in Anaheim
- Do I need a Title 24 report for a project in Anaheim?
- Is Anaheim Hills a different climate zone from the rest of Anaheim?
- How much does a Title 24 report cost in Anaheim?
- How long does an Anaheim Title 24 report take?
- Do Anaheim ADUs need a Title 24 report?
- Does an Anaheim garage conversion need Title 24?
- Do room additions in Anaheim require Title 24?
- Which climate zone applies to my Anaheim project?
- Do Anaheim commercial tenant improvements require Title 24?
- What happens if Anaheim plan check requests Title 24 corrections?
Anaheim projects fall in California climate zone 8. The zone drives the envelope and equipment requirements a report has to meet, and a single city can span more than one, so it is confirmed per address.