Why ADUs Matter in Oakland—and Why It Matters to Riverside Too

With California facing a deep housing shortage, Accessory Dwelling Units (ADUs) have become a top solution for affordable housing, rental income, and flexible living. Oakland is a prime example of a city making it easier for homeowners to build ADUs through streamlined ADU application processes and permit-ready plans.

👉 Even if you're in Riverside, learning from Oakland’s successful ADU system can help you navigate your own city’s requirements and find the best solution for your property.

What Is an ADU in Oakland?

An Accessory Dwelling Unit (ADU) is a secondary housing unit built on a single-family or multifamily lot. Oakland allows several types of ADUs:

• Detached ADU (standalone)

• Attached ADU (added to main home)

• Garage Conversion

• Basement or Attic Conversion

• Junior ADU (JADU) – under 500 sq. ft., within the main home

Step-by-Step: Oakland ADU Application Process

1. Check Zoning Eligibility

Make sure your lot is:

• Zoned for residential use (R1, R2, RM, etc.)

• Has enough space for setbacks, height, and lot coverage

• Not in a historic or hazard zone (check with Oakland Planning)

2. Choose an ADU Type

• New Construction ADU

• Conversion of Existing Space (Garage, Basement, etc.)

• Pre-Approved Detached Plans from the city

3. Use Pre-Approved Plans (Fast-Track Option)

Oakland offers permit-ready ADU designs (studio, 1BR, 2BR). These:

• Are free to use

• Meet all local zoning/building codes

• Save weeks in plan check and architecture fees

4. Submit a Zoning Worksheet

Submit through the Online Permit Center. You’ll need:

• Site Plan

• Floor Plan (pre-approved or custom)

• Zoning Worksheet (to confirm compliance)

5. Apply for Building Permit

Once zoning is cleared:

• Upload building documents

• Submit construction details, materials, structural info

• Pay permit fees

ADU Cost Breakdown in Oakland (Estimates for 2025)