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Fortune ADU

Get Your ADU Permits in San Diego—The Smart, Stress-Free Way

Building an ADU (Accessory Dwelling Unit) in San Diego is one of the best ways to unlock value in your property, create passive income, or bring family closer. But before you can break ground, you’ll need something vital: a permit. That’s where we come in.


At Fortune ADU, we simplify the complex. With deep expertise in local San Diego regulations and a dedicated in-house permitting team, we’ll guide you through every step, so you can stop Googling and start building.

What Is an ADU Permit and Why Does It Matter?

An ADU permit is the city’s official approval for you to build your accessory dwelling unit. It’s how local agencies ensure your project meets all building, zoning, and safety codes. Without it? You risk fines, delays, and potential demolition orders.


Getting a permit may seem like a formality, but it’s a cornerstone of your ADU project. It ensures:
  • Legal construction 
  • Access to utility hookups 
  • Ability to rent or sell 
  • Long-term value protection 

In short, the permit process serves as both a gatekeeper and a green light. And getting it right can make all the difference.


How San Diego Handles ADU Permits

San Diego is one of California’s most ADU-friendly cities, but that doesn’t mean the permitting process is a breeze. There are local rules, state overrides, and site-specific variables that can impact your path to approval.


Here’s What Makes San Diego Unique:

1. By-right zoning

Many residential properties are eligible for ADUs without a hearing.

2. Pre-Approved Plans

San Diego offers some pre-approved plans, but they still require site-specific permits.

3. Tiered Process

You’ll need to clear both the Planning and Building departments.

4. Separate Permit Types

Detached ADUs, garage conversions, and junior ADUs may follow slightly different permitting paths.

You’ll also need to consider:
  • Setbacks
  • Utility connections
  • Easements
  • Fire access
  • Coastal or historical overlays

That’s a lot to unpack, and it’s exactly why a partner like Fortune ADU makes sense.


The ADU Permit Process in San Diego

Navigating the ADU permit process can seem daunting, but with Fortune ADU by your side, you can rest easy knowing we’ll handle everything. Here's a breakdown of the typical steps involved in obtaining your ADU permit in San Diego:

  1. Initial Consultation: We begin by discussing your ADU project, understanding your needs, and assessing your property.

  2. Design and Planning: Our in-house experts work with you to design a custom ADU that fits your vision while complying with all San Diego zoning codes and regulations.

  3. Pre-Application Review: We review your design and project with the City of San Diego to ensure it meets all guidelines and requirements.

  4. Permit Application Submission: We manage the entire application process, ensuring all documents and plans are submitted correctly for approval.

  5. Permit Approval: Our team ensures that your permit application is processed swiftly and efficiently, working directly with city officials for approvals.

  6. Construction and Inspection: Once your ADU permit is approved, we manage the construction and coordinate all necessary inspections until your project is completed.


How Long Does It Take to Get an ADU Permit in San Diego?
Typical ADU permit timelines in San Diego:

 Phase Timeline 
 Feasibility & Design 2–4 weeks
 Initial City Review   4–6 weeks
 Revisions & Recheck  1–3 weeks
 Total Permit Time   8–12 weeks   (on average)


Timelines can vary based on:

  • Project complexity

    • Site-specific issues
    • City review backlog
    • Responses to comments

    We aim to reduce delays wherever possible, and our experience means fewer plan rejections, faster responses, and smoother approvals.

    Key ADU Regulations in San Diego

    Here are some essential things to know about the regulations governing ADUs in San Diego:

    • Size Limitations: ADUs are generally limited to 1,200 sq. ft. in size, though this can vary depending on zoning and other factors.

    • Setback Requirements: ADUs must meet specific setback rules, usually ranging from 4-10 feet from property lines.

    • Parking Requirements: Typically, no additional parking is required for an ADU if the property is within half a mile of public transportation.

    • Height Restrictions: ADUs cannot exceed 16 feet in height, though this may vary based on the type of ADU.


    How Much Does an ADU Permit Cost in San Diego?

     Fee Type Estimated Cost
     Building Permit Fees$2,500 – $5,000+
     Impact Fees$800 – $2,500
     Plan Review Fees $2,000 – $15,000+
     Utility Connection Fees$2,000 – $15,000
     Total Estimated Fees $7,000 – $40,000+

    What Can Slow Down or Block an ADU Permit?

    Even in an ADU-friendly city, some common pitfalls can derail your permitting process. Watch out for:

    1. Illegal structures   on your lot
    2. Unpermitted work   from previous owners
    3. Easements or utility conflicts 
    4. Coastal zone overlays 
    5. Fire department requirements (access, hydrant spacing)

    We flag these issues upfront during feasibility so they don’t catch you by surprise later.

    Tips for a Smooth ADU Permit Process
    1. Plan Ahead: Ensure that all your paperwork and designs are complete before submitting your ADU permit application. This will help speed up the review process.
    2. Work with Professionals: Hiring a qualified architect or contractor who is familiar with San Diego’s ADU regulations can make the process easier and reduce the likelihood of delays.
    3. Stay Informed: Keep yourself updated on any changes in local ADU laws or requirements by regularly visiting the City of San Diego’s website or contacting their permit center.

    FAQ

    Do I need a permit to build an ADU in San Diego?

    Yes, the City of San Diego requires permits for all ADU constructions to ensure safety and zoning compliance. We handle all aspects of the permitting process to save you time and hassle.

    How long does the ADU permitting process take?

    Timelines can vary, but with our streamlined service, most permits are approved within 3–6 months depending on project complexity and city review times.

    How much does it cost to get an ADU permit in San Diego?

    Costs vary based on size and design, but we offer transparent pricing with no hidden fees. Contact us for a free estimate tailored to your specific property.

    Can you help with garage conversions or prefab ADUs?

    Absolutely! We specialize in all ADU types—garage conversions, attached units, detached builds, and prefab installations—ensuring each meets San Diego’s building codes.