Appendix BJ — STRAWBALE CONSTRUCTION
BJ101 General — 2025 California Residential Code
California Residential Code (Title 24, Part 2.5) · 2025 edition · updated 2026-10-19 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Residential Code (Title 24, Part 2.5) § BJ101 · Effective January 1, 2026 · Official source: Building Standards Commission
BJ101.1 Scope.¶
This appendix provides prescriptive and performance-based requirements for the use of baled straw as a building material. Other methods of strawbale construction shall be subject to approval in accordance with Section R104.2.2 of this code. Buildings using strawbale walls shall comply with this code except as otherwise stated in this appendix.
BJ101.2 Strawbale wall systems.¶
Strawbale wall systems include those shown in Figure BJ101.2 and approved variations.
FIGURE BJ101.2—TYPICAL STRAWBALE WALL SYSTEMS
Note: See Figures BJ105.1(1) through BJ105.1(4) for detailed views and section references. Other strawbale wall systems or variations are permitted as approved .
BJ101.3 Flood hazard areas.¶
In flood hazard areas established in Table R301.2, buildings using strawbale wall systems shall meet the requirements of Section R306.
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