Riverside County, CA Building Safety: Building Permits (2026)
Key Facts
- Exempt deck size
- under 200 sq ft
- Exempt deck height
- 30 inches above grade max
- Must be
- detached, no exit door
- Patio covers
- CRC Appendix BF adopted whole
- Enforcing agency
- Dept. of Building and Safety
Summary
Unincorporated Riverside County exempts small decks from a building permit: under 200 square feet, no more than 30 inches above grade, detached from the dwelling, and not serving a required exit door. Bigger, higher, or attached decks need a permit.
Decks not exceeding 200 square feet (18.58 m 2 ) in area, that are not more than 30 inches (762 mm) above grade at any point, are not attached to a dwelling or townhouse and do not serve the exit door required by Section R318.4.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 84 Update 1).
Full Breakdown
Riverside County's local amendment to the California Residential Code (County Code § 15.04.110, amending CRC § R105.2) exempts decks under 200 square feet that sit no more than 30 inches above grade at any point, aren't attached to a dwelling or townhouse, and don't serve a required exit door. Anything past those limits needs a permit from the Department of Building and Safety before construction starts. Patio covers are handled separately: the County adopts CRC Appendix BF - Patio Covers in its entirety (§ 15.04.120) without spelling out its own size exemption, so check with Building and Safety before building one without a permit.
Violations & Fines
Building a deck or patio cover past the exempt threshold without a permit is Construction Without Permit (CWP) under the amended CRC § R105.1.1; the Department of Building and Safety can require testing, retroactive permitting, and fees before the structure may remain.
Frequently Asked Questions
Does my deck in unincorporated Riverside County need a permit?
Are patio covers exempt the same way decks are?
Sources & Official References
Other rules in Riverside County
California rules heatmap·Compare Riverside County to another location·View the California building safety overview
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