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Fortune ADU
Fortune ADU
We Provide ADU Permit

How to Get an ADU Permit in Berkeley, California

ADU

What Is an ADU?

An Accessory Dwelling Unit (ADU) is a self-contained residential unit located on the same lot as a primary home. Commonly called a granny flat, garage apartment, or in-law suite, an ADU in Berkeley can be attached, detached, or a converted part of your home like a basement or garage. It includes a full kitchen, bathroom, and separate entrance.

ADUs are ideal for:

  • Long-term rentals

  • Housing family members

  • Increasing property value

  • Contributing to Berkeley’s housing supply

📋 ey ADU Regulations in Berkeley, CA

Understanding Berkeley’s ADU rules is crucial to building legally. Here's a summary:

RegulationRequirement
Zoning Eligibility
ADUs allowed in most residential zones (R-1, R-2, R-3, etc.)
Maximum SizeUp to 850 sq ft (1 bed) or 1,000 sq ft (2 beds); 1,200 sq ft for detached units in some cases
Height Limit16–18 ft for detached ADUs (may be higher depending on location)
Setbacks4 feet from side and rear property lines
ParkingNot required if within ½ mile of public transit
Owner Occupancy Not required (as per state law until 2025)
Minimum Lot Size No minimum size to build an ADU

📝 Steps to Get an ADU Permit in Berkeley

Follow these key steps to get your ADU legally permitted:

  1. Check Zoning and Eligibility
    Use Berkeley’s zoning map or consult the Planning Department.

  2. Hire a Designer or Architect
    Prepare detailed ADU plans compliant with California Building Code and local ordinances.

  3. Pre-Application Consultation (Recommended)
    Submit a preliminary review to get feedback from Berkeley's Planning Division.

  4. Submit Permit Application
    Apply through the City of Berkeley Online Permit Service Center. Include:

    • Site plan

    • Floor plans

    • Structural details

    • Application form

  5. Plan Review & Corrections
    City staff reviews your plans, may request revisions.

  6. Get Permit Approval & Start Building
    Once approved, begin construction with inspections at required stages.

  7. Final Inspection & Occupancy Certificate
    Complete construction and receive approval to legally occupy the ADU.

💰 How Much Does an ADU Permit Cost in Berkeley?

Here’s a general breakdown of ADU permit-related fees:

Fee Type Estimated Cost
Plan Check Fee
$800 – $2,000
Building Permit Fee$1,000 – $3,000
Planning Review Fee$500 – $1,500
School Impact Fees$3–$5 per sq ft (if >500 sq ft)
Sewer/Utility Fees$500 – $1,200 (varies)
Total Estimated Cost $2,800 – $8,000+

✅ Benefits of Building a Permitted ADU in Berkeley

    • 💵 Rental Income: Long-term rental income from legal tenants

    • 📈 Increased Property Value: Boosts market value and appeal

    • 🏡 Multi-Generational Living: Home for parents, children, or caregivers

    • 🌍 Supports Sustainable Housing: ADUs help meet Berkeley's housing goals

    • 📑 Full Legal Compliance: Avoid penalties or forced removals

    • 💰 Financing Options Available: Use HELOCs, ADU loans, or grants

FAQ

Do I need a permit for an ADU in Berkeley?

Yes. All ADUs in Berkeley require permits for legal construction and occupancy.

Can I build an ADU on a multifamily property?

Yes. You may build multiple ADUs depending on lot size and configuration.

How long does the permit process take?

Typically between 6 to 12 weeks, depending on plan complexity and city workload.

Is a garage conversion allowed?

Yes, converting garages into ADUs is allowed and often exempt from parking requirements.

Can I rent my ADU as a short-term rental (Airbnb)?

No. Berkeley prohibits short-term rentals of ADUs. Minimum 14–30 days lease may be required.