How to Obtain the Necessary Permits for Your ADU
Before you begin building your accessory dwelling unit (ADU), it’s important to understand the necessary permits and the approval process required in California. Obtaining the right permits ensures your ADU meets local and state regulations, keeping your project compliant and on track. At MF ADU, we help homeowners navigate the permitting process, ensuring everything is in place before construction begins.
Why Are Permits Required for ADUs?
Permits are required to ensure that your ADU meets California’s building codes and safety standards. These regulations address structural integrity, fire safety, energy efficiency, and more. The permitting process helps prevent issues that could arise from unapproved construction, providing peace of mind for you and your future tenants.
Step 1: Understand the Local Regulations
The first step in obtaining permits for your ADU is understanding local zoning and building codes. California has statewide laws for ADUs, but cities and counties may have additional rules that affect things like lot size, setback requirements, and design standards.
Key things to review:
Zoning codes for ADU placement
Setback requirements (how far your ADU must be from property lines)
Maximum size and height restrictions
Design review or aesthetic guidelines
Step 2: Prepare and Submit Your Plans
Once you understand the local requirements, you’ll need to prepare detailed plans for your ADU. These plans typically include:
Site plan showing property boundaries and ADU placement
Architectural drawings that show floor plans, elevations, and structural details
Utility plans to ensure proper water, sewer, and electrical connections
Working with experienced designers can streamline this process, ensuring your plans are complete and meet city standards.
Step 3: Submit Your Plans for Review
Once your plans are ready, submit them to your local building department for review. This is where your permit application begins. The city will review the plans for code compliance, which can take anywhere from a few weeks to a couple of months depending on the location.
In some cases, your city may request revisions or additional information. We guide homeowners through this process to make sure everything is addressed promptly.
Step 4: Pay the Permit Fees
Permit fees vary by city and can depend on the scope of your project. These fees typically cover plan checks, inspections, and the administrative costs of reviewing your application.
Once the fees are paid and the plans are approved, you’ll receive the necessary building permits to begin construction.
Step 5: Schedule Inspections During Construction
After permits are issued, construction can begin—but you’ll need to schedule inspections at various stages to ensure compliance with approved plans. These inspections typically occur during:
Foundation and framing
Plumbing and electrical
Final inspection for occupancy approval
We assist in coordinating these inspections and ensuring everything is up to code.
Did you know?
Did you know? California law requires that cities process ADU permit applications within 60 days, making the process faster than traditional construction permits.
Obtain Permits with MF ADU
At MF ADU, we help streamline the entire permitting process—from understanding local codes to submitting plans and coordinating inspections. Our experienced team ensures that you stay compliant and keep your project moving forward without delays.
Start your ADU journey by exploring our ADU models and pricing.
Frequently Asked Questions
How long does it take to get an ADU permit in California?
The permitting process can take up to 60 days, but timelines may vary depending on your city’s review process.
Do I need permits for all ADUs?
Yes, all ADUs require permits to ensure they meet building codes and zoning regulations.
What happens if my ADU plans are rejected?
The city may ask for revisions or additional information to comply with regulations. We assist in addressing these requests promptly.
Can I start construction before permits are approved?
No. Construction can only begin once the necessary permits are issued by your city’s building department.
Does MF ADU help with permit applications?
Yes. We guide you through the entire process—from design and plan submission to inspections and final approval.