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California
The codes a design has to satisfy and the bodies that publish and amend them.
17 authorities, 17 statutory, 16 free to read.
American Society of Civil Engineers
California Building Standards Commission
This Part is where the non-local AHJ regimes live and it is the Part most often skipped. Anyone working on schools, community colleges, hospitals or skilled nursing needs it before they touch Part 2.
California Building Standards Commission / Office of the State Fire Marshal
Every regulated element must be a listed, tested assembly, so this chapter lands on procurement rather than drawing content. It is one of the three places a set drawn to model codes will fail a California plan check.
California Building Standards Commission / Division of the State Architect
California enforces its own accessibility provisions at permit alongside federal ADA liability. Designing to the federal standards alone will fail a plan check, and the twenty percent cap has no federal equivalent.
California Building Standards Commission / International Code Council
Two volumes, based on the IBC but amended, with state agency amendments interleaved and marked in the margin. Never cite an IBC section number as if it were Californian.
California Building Standards Commission (Department of General Services)
State agencies propose building standards in their own areas and the Commission adopts and publishes them, which is why one Part can carry several agencies' amendments in the same chapter.
California Building Standards Commission
Grouped because the amendment pattern is the same across all three: model code plus state amendments plus possible local amendments filed under HSC 17958.7.
California Building Standards Commission / International Code Council
The interaction between this Part, the accessibility path-of-travel obligation and a local retrofit ordinance determines the real cost of a California alteration, and none of the three can be read alone.
California Building Standards Commission / Office of the State Fire Marshal
Fire authority review is often a separate submission from the building plan check, with its own comments and duration. Programme it separately.
California Building Standards Commission
Frequently the route that makes an adaptive reuse viable in California, particularly on seismic retrofit and accessibility, and frequently overlooked because designers reach straight for the Existing Building Code.
California Building Standards Commission
Short, dull and load-bearing. Using an unadopted edition of a referenced standard invalidates a calculation set even when the engineering is sound.
California Building Standards Commission / International Code Council
The moratorium makes this Part unusually stable until mid-2031, but it also means local reach codes on housing adopted after September 2025 are probably void. Check before pricing compliance with one.
California Legislature / Division of the State Architect
A CASp report is a commercial asset for the owner and the remediation it identifies is real scope. The Civil Code 1938 presumption that the owner pays for correction decides who buys the accessibility work a tenant fit-out triggers.
California Legislature / Board of Forestry and Fire Protection
Site and landscape scope routinely omitted from the building contract and then demanded at final inspection. Zone 0 in particular forces a landscape and hardscape redesign, so resolve it at design stage.
Division of the State Architect (Department of General Services)
Public school work is removed from local building department control entirely. Review is slower and stricter, field changes need DSA approval, and an uncertified project is a live liability for the district.
Department of Health Care Access and Information (formerly OSHPD)
HCAI replaces the local building department for these facilities. The inspector of record is a named, approved individual whose availability is a real programme constraint, and the deadline for a specific hospital building depends on its rating and any extension, so read it from HCAI's records.
California Legislature
This is the machinery that makes California's code landscape two-layered. Any code analysis reading only Title 24 and not the adopting jurisdiction's ordinance is incomplete.
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