Title 24 Reports in Redding
Redding is climate zone 11 in all 3 of its street ZIP codes, and the city's own pre-approved ADU drawings print the same zone. They also cite the 2022 Energy Code — and an application made now falls under the 2025 edition.
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Seven ready-drawn ADUs, one code behind
The city's Pre-Approved ADU Program offers seven designs, from the 400-square-foot Pied-à-terre to the 800-square-foot Shasta, with Blue Oak, Chinook, Descanso, Lassen and Milena in between; some come with a garage option. The pitch is faster plan review and less design time. All seven published plan sets name climate zone 11, which matches the Energy Commission's table for Redding, print their energy requirements on the sheets and cite the 2022 California Energy Code.
That matters because of a gap in the paperwork. The city's checklist for a pre-approved unit, last updated in June 2024, does not ask for separate energy calculations; the checklist for a custom ADU does. The 2025 Energy Code applies to permit applications submitted on or after 1 January 2026, so before relying on energy figures written to the earlier edition it is worth confirming with the Building Division what it now expects with a pre-approved set.
Solar on a roof built for snow
The same checklist calls for a separate photovoltaic permit on a new detached unit. Since 1970 Redding has required roofs to be designed for a 30 psf roof snow load, non-reducible, and the pre-approved plan sets carry the same figure. Homes built before 1970 cannot use the automated SolarAPP+ route, and adding panels to a roof not designed for that load means reinforcing it or showing it can carry the weight. The array the energy report sizes has to fit those rules.
A city-owned utility handles the meter
Redding Electric Utility has belonged to the city since 1921, when Redding bought the local system from a predecessor of PG&E. On the city's automated solar route, an REU customer uploads a signed interconnection agreement from the utility through the permitting portal before the permit is issued, and the AC disconnect must sit within ten feet of the REU meter and in sight of it. Permits themselves run through the Building Division's EnerGov self-service portal.
A wildfire code from January 2026
In January 2026 the City Council adopted the 2025 Wildfire Code, which requires new construction in designated fire hazard zones to meet defensible space standards and keep an ember-resistant zone closest to the building. That review sits alongside the energy report rather than inside it, but both describe the same walls, roof and windows.
Zone 16 along the highways out of town
Head east on State Route 299 and Round Mountain (96084) is still zone 11; Montgomery Creek, Burney and Fall River Mills beyond it are zone 16. North on Interstate 5 the pattern repeats: Lakehead (96051) is zone 11 and Castella (96017) is zone 16. Those are Shasta County permits, not the city's, and a Redding design taken up either road is modelled for a far colder climate.
Common Title 24 Questions in Redding
- Is all of Redding in climate zone 11?
- Is Burney in climate zone 16?
- Does a Redding pre-approved ADU need a Title 24 report?
- Do Redding room additions require Title 24?
- What happens if Redding plan check requests Title 24 corrections?
- How long does a Redding Title 24 report take?
- Do Redding commercial tenant improvements require Title 24?
Redding projects fall in California climate zone 11. 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.
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Shasta County