Title 24 Reports in San Jose
San Jose is the only large Bay Area city in climate zone 4. The cities around the bay shore are zone 3 and the inland valleys are zone 12, so figures from a nearby job rarely carry across.
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San Jose is the Bay Area's zone 4 city
Every ZIP code in the city is assigned climate zone 4, and no other large city in the region shares it. San Francisco, Oakland, Berkeley, Richmond, Hayward, Fremont, San Mateo and Redwood City are all zone 3. Head inland over the Diablo range instead and Livermore, Walnut Creek and Concord are zone 12.
Three zones inside one metropolitan area, and San Jose does not share one with the cities most Bay Area practices also work in. A performance model that complied on a job in Oakland or up the peninsula will not stand behind a San Jose permit, which is a routine way a report reaches plan check already wrong.
The boundary follows the county line
What is unusual here is how sharp the line is: around the bay it tracks the Santa Clara County boundary rather than the terrain. Menlo Park is zone 3 and Palo Alto across the line is zone 4. Fremont is zone 3 and Milpitas across the line is zone 4. Scotts Valley is zone 3 and Los Gatos across the line is zone 4. Every ZIP code in the county, from Palo Alto at the north end down through Gilroy, carries zone 4.
That makes the zone straightforward to establish for any address inside the city and easy to misread just outside it. A house in the hills above Los Gatos and one in Scotts Valley can sit a few miles apart on opposite sides of the assignment, with different envelope and equipment targets to hit.
Permitting through Planning, Building and Code Enforcement
Permits inside the city are handled by the City of San Jose Planning, Building and Code Enforcement department, which reads the energy compliance set together with the architectural drawings rather than as a separate submission. Where comments come back on the energy documents, it is generally because the forms and the sheets are describing different buildings — glazing areas or equipment selections that moved after the calculations were finished.
Common Title 24 Questions in San Jose
- Which climate zone applies to a San Jose project?
- Why is San Jose zone 4 when Fremont is zone 3?
- Does a Palo Alto or Gilroy project use the same zone as San Jose?
- Will a report prepared for an Oakland project work in San Jose?
- What does Planning, Building and Code Enforcement look for in the energy set?
- Does a San Jose ADU or garage conversion need an energy report?
- Are San Jose tenant improvements covered by the nonresidential forms?
- What should I send if plan check questions the energy calculations?
San Jose projects fall in California climate zone 4. 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.