SB 721 vs SB 326 in Riverside County
If you manage an apartment building in Riverside County with 3 or more units, SB 721 applies and the inspection deadline was January 1, 2026. If you sit on an HOA board for a condo property, SB 326 applies and the deadline was January 1, 2025. Both laws focus on Exterior Elevated Element (EEE) condition, with waterproofing failure as a primary driver of repair scope.
For Riverside County properties, the most common inspection findings on aging balconies are:
- Failed waterproofing at deck-to-wall transitions
- Texture coat checking and cracking
- Topcoat erosion at high-traffic spots
- Wood rot in framing where water has been intruding for several seasons
Riverside County permit and AHJ guidance
Riverside County Building & Safety serves as the AHJ for unincorporated areas and several smaller cities. Larger cities (Riverside, Murrieta, Temecula, Corona, Moreno Valley) run their own plan check. All accept ICC-ES evaluation reports as primary code-compliance documentation.
For permit submittal:
- Include ESR-3672 cover and the section matching the specified Deck Flex system (W.M. for Class A, W.F. for Class B)
- Reference the manufacturer’s installation manual
- Show flashing details at edge and wall transitions
- Plan check turnaround is typically 2-4 weeks
For SB 326 HOA work, time the permit application around the 120-day window for non-emergency repairs. For SB 721 apartment work, similar timeline depending on inspection findings.
Specifying Deck Flex for Riverside County projects
For multi-family work where Class A fire rating is required, specify Deck Flex W.M. over plywood. For projects where Class B is acceptable, W.F. is the lower-cost system. Both are covered under ESR-3672.
The county’s microclimate range matters for system selection: coastal-influenced Temecula and Murrieta projects see less thermal cycling than inland Riverside or Hemet projects. The systems handle either condition; topcoat refresh intervals will differ.
Related Riverside County regions
If your project is in the desert resort areas (Palm Desert, Palm Springs, La Quinta), see the Coachella Valley balcony waterproofing guide — that microclimate has additional considerations. For projects across the broader Inland Empire, see Inland Empire balcony waterproofing.
Recommended systems for Riverside County
Where to specify and source
For California projects, the full SB 721 and SB 326 framework, regional inspector expectations, and code-compliance background lives on our SB 721 and SB 326 balcony waterproofing pillar guide.
For where to buy Deck Flex products and reference building-code documentation across the broader product line, see USMadeSupply.com.