Building codes & construction
California Historical Building Code (CHBC)
Title 24, Part 8 — alternative, performance-based standards that let qualified historic buildings meet safety intent without full modern code compliance.
Definition
The California Historical Building Code (Title 24, Part 8) is an alternative compliance path for "qualified historical buildings" — those listed in, or determined eligible for, a federal, state or local register or official inventory. Instead of prescriptive modern requirements it sets performance-based standards that accept archaic materials and original construction, with alternative approaches to structural and seismic work, egress, fire protection and accessibility that preserve historic fabric while meeting the code's safety intent. Its use is at the owner's election, alongside the regular code.
Why it matters in an underwrite
For historic adaptive reuse the CHBC is frequently the difference between feasible and not: reduced-force seismic approaches and alternative egress and accessibility solutions can cut rehabilitation scope substantially versus full CBC compliance. It pairs naturally with federal and state historic rehabilitation tax credit strategies, which fund the same buildings. Plan-check familiarity varies by jurisdiction, so bring a preservation-experienced architect and put the CHBC on the table at the first plan-check meeting.
Sources & related guides
See also
See the term in the law itself
Read the controlling text in the Code Library, or ask the AI how it applies to your project.
Last reviewed 2026-07-29. General information, not legal advice.