ADU plans in Riverside
ADU plans for Riverside homeowners.
Riverside makes ADUs a priority through its Dwell Riverside program. We design custom ADUs for lots and layouts the city’s standard plans don’t fit.
Building an ADU in Riverside
What to know before you start.
Based on the city’s published ADU information as of October 2026. Rules change; we confirm the requirements for your address before design.
- Riverside offers four permit-ready ADU plans (746 to 1,200 sq ft) for eligible lots outside flood zones and historic resources.
- Custom ADU plans go through the city’s regular review and must be prepared by a licensed professional.
- Applications are filed through Riverside’s Public Permit Portal; the One Stop Shop is at (951) 826-5800.
- Historic properties have their own ADU design standards. We check this before design.
Sources: Dwell Riverside, Riverside permit-ready ADU plans, and the HCD ADU Handbook.
Our ADU package
One flat fee, permit-ready.
- Site visit and measurements
- Layout and elevations you approve first
- Architectural, structural and MEP plans
- Title 24 energy and CALGreen documents
- Submittal to Riverside and plan-check corrections