Ch. 17 Special Inspections and Tests — 2025 California Building Code
California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Sections in this part
- Section 1701 — GENERAL
- Section 1702 — NEW MATERIALS
- Section 1703 — APPROVALS
- Section 1704 — SPECIAL INSPECTIONS AND TESTS, CONTRACTOR RESPONSIBILITY AND STRUCTURAL…
- Section 1705 — REQUIRED SPECIAL INSPECTIONS AND TESTS
- Section 1706 — DESIGN STRENGTHS OF MATERIALS
- Section 1707 — ALTERNATIVE TEST PROCEDURE
- Section 1708 — IN-SITU LOAD TESTS
- Section 1709 — PRECONSTRUCTION LOAD TESTS
- Section 1710 — OFF-SITE CONSTRUCTION [OSHPD 1R, 2 & 5]
Cite as: 2025 California Building Code (Title 24, Part 2) Chapter 17 · Effective January 1, 2026 · Official source: Building Standards Commission
User notes:
About this chapter: Chapter 17 provides a variety of procedures and criteria for testing materials and assemblies, and labeling materials and assemblies. Its key purposes are to establish where additional inspections/observations and testing must be provided, and the submittals and verifications that must be provided to the building official. This chapter expands on the inspections of Chapter 1 by requiring special inspection by a qualified individual where indicated and, in some cases, structural observation by a registered design professional. Quality assurance measures that verify proper assembly of structural components and the suitability of the installed materials are intended to provide a building that, once constructed, complies with the minimum structural and fire-resistance code requirements as well as the approved design. To determine this compliance often requires frequent inspections and testing at specific stages of construction.
ICC code development note: Code change proposals to sections preceded by the designation [BF] will be considered by the IBC—Fire Safety Code Development Committee during the 2024 (Group A) Code Development Cycle. Sections preceded by the designation [F] will be considered by the International Fire Code Development Committee during the 2024 (Group A) Code Development Cycle. All other code change proposals will be considered by the IBC—Structural Code Development Committee during the Group B cycle.
301.4 Use of shipping containers repurposed as buildings and building components.¶
Use of shipping containers repurposed as buildings and building components is not permitted by the California Building Code (CBC) Section 3115.
1710.2.2 ICC 1200 Section 503.1. Modify ICC 1200 Section 503.1 by adding the following:
Quality Assurance/Quality Control (QA/QC) shall satisfy all the requirements for Testing, Inspection, and Observation (TIO) in the California Building Standards Code (CBSC).
1710.3 Regulatory compliance.¶
In addition to other applicable requirements in this code, off-site construction shall be inspected and regulated in accordance with ICC 1205, with texts modified by Sections 1710.3.1 through 1710.3.2.
1710.3.1 ICC 1205 Section 302.1. Modify ICC 1205 Section 302.1 by adding the following:
Construction documents for plan approval shall satisfy all the requirements in the California Building Standards Code (CBSC).
1710.3.2 ICC 1205 Section 501.1. Modify ICC 1205 Section 501.1 by adding the following:
Testing, Inspection, and Observation (TIO) program shall satisfy all the requirements in the California Building Standards Code (CBSC).
17-22 2025 CALIFORNIA BUILDING CODE
CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE
CHAPTER 17A – SPECIAL INSPECTIONS AND TESTS
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
| Adopting agency | BSC | BSC- CG |
SFM | HCD | DSA | OSHPD | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopting agency | BSC | BSC- CG |
SFM | 1 | 2 | 1/AC | AC | SS | SS/CC | 1 | 1R | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Adopt entire chapter | X | X | X | X | ||||||||||||||||||||
| Adopt entire chapter as amended (amended sections listed below) |
||||||||||||||||||||||||
| Adopt only those sections that are listed below |
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| Chapter / Section |
The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
17A-2 2025 CALIFORNIA BUILDING CODE
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