Skip to searchSkip to main content
  • Welcome to Fortune ADU

    Your Reliable Partner For ADU Permit in California

    Fortune Adu is proud to provide the most reliable ADU permit services and excellent planning Adu in California.

    Get a free consultation
Best ADU Permit Service in California

Best ADU Permit Service in California

As a major ADU  permit service in California, we specialize in helping you get permits for custom ADU garage conversions, making your garage turn into a functional living space. Whether you are interested in obtaining permits for custom small homes or a comfortable Granny Flat, our expert team exists to guide you in this process. As a reliable ADU permit service provider in California, we provide you aid at every step, including obtaining the necessary permits and ensuring that your project is stress free and fully follows all local rules.


Explore ADU Floor Plans

See our versatile Adu Floor Plan, designed to meet the needs of your diverse lifestyle-for the income of furious fare, for guest housing, or for a multi-generation life. Each layout has been thoughtfully designed to maximize location, functionality and modern comfort. From small studios to huge two-bedroom units, you will find suitable smart designs for both small and big homes. Browse options that follow the Building Code of California and local zoning rules. With flexible adaptation, you can turn your imagination into reality. Today, find the perfect ADU plan according to your lifestyle.

ADU Floor Plan
ADU Floor Plan
SEE ALL ADU FLOOR PLANS
ADU Floor Plan
Custom Tiny Homes
Custom Tiny Homes

Custom designs provide compact and efficient living solutions while adding a modern touch.

Granny Flat - ADU
Granny Flat

Comfortable and independent living spaces designed to reflect your unique lifestyle.

Garage Conversion - ADU
Garage Conversion

Convert underused garages into functional and inviting living spaces that are customized to suit your needs.

Contact Form

Start Your ADU Project in California Now!

Enter the Captcha

How to Get ADU Permit in California

The construction of an auxiliary residential unit (ADU) in California is a smart way to maximize your property, whether it is to generate rental income, to create extra living space for the family, or to expand your home office. Before starting construction, it is necessary to understand the ADU permit process. In Fortune Adu, we simplify your adu permit process, ensuring that it is quick and complies with all local rules.

Why Do You Need ADU Permit in California?

In California, all Accessory Dwelling Unit (ADU) construction projects must receive approval from local authorities. Obtaining an ADU permit ensures that your unit complies with zoning requirements, building codes, and safety standards set by the state. Whether you are constructing a detached ADU, converting a garage, or adding a second-story unit, securing the necessary permits for ADU construction is the crucial first step toward a successful project.

Stages of Obtaining ADU Permit in California

ADU Permit
ADU Permit Provider

Step 1: Understand Local Zoning Laws

The first phase of the Adu permit process is to determine whether your property is eligible for the Accessory Dweling Unit (ADU). California laws have specific zoning requirements that depend on factors such as property size, location and setback. Our team can help you understand these zoning rules to ensure that your ADU plans follow local norms.

Step 2: Prepare Your ADU Design

Your ADU design plans should be detailed and corresponding to the California building code. Whether it is a conversion of a garage or a new building, design security and access standards should be met. Our ADU design experts in Fortune ADU can help you create plans that are both functional and permits.

Step 3: Submit Your ADU Permit Application

Once your design is ready, you have to submit your ADU permit application to your city or county planning department. This application will include your map, property details and other necessary documents. Our experienced team of Fortune ADU exists to help you submit a complete and accurate application to avoid any delay.

Step 4: Schedule Inspections and Address Modifications

After submitting your ADU application, we will schedule inspections to ensure that your project complies with all applicable safety standards. If an adjustment is required, we will help you modify your design quickly to ensure compliance and get approval for your ADU.

Step 5: Receive Your ADU Permit

After getting approval, you will get your ADU permit and you can start construction on your project. With our comprehensive information of California's Adu laws, we ensure that your permit is smooth and efficiently processed.

Multi-City Areas Served

We are proud to offer adu permit services in places like Napa County, Malibu, Sunvel, Los Angeles, San Diego, Santa Barbara, San Francisco, Sacramento and Orange County in many cities of California. Our team specializes to guide you in the permit process for the places of getting customized, such as the backyard cottages to the huge guest house, designed to increase the value and functionality of your property. Whether you want to get permits for small homes, garage conversions, or multi-family ADU, we provide adapted solutions to your needs. With years of experience, we ensure that each project follow local rules and also streamlines the permit process to make your project quick and efficiently approve.

Join Now!
ADU Builders
San Diego

San Diego ADUs (Granny Flats) offer a cost-effective solution for homeowners looking to maximize property value and rental income in California. Fortune ADU simplifies the ADU permit San Diego, ensuring your ADU project complies with local regulations, meets the city’s housing demands, and is completed efficiently. Let us handle the permitting, so you can focus on bringing your ADU vision to life seamlessly.

Los Angeles

Los Angeles accessory dwelling units (ADUs) provide homeowners with a fantastic opportunity to enhance property value and generate rental income in popular neighborhoods. At Fortune ADU, we specialize in handling the ADU permit Los Angeles process from start to end, ensuring that your project adheres to zoning laws and local regulations. This makes it a smart investment for expanding your living space. Let us take care of the permits so you can concentrate on designing the perfect ADU.

Sacramento

We are proud to offer adu permit services in places like Napa County, Malibu, Sunvel, Los Angeles, San Diego, Santa Barbara, San Francisco, Sacramento and Orange County in many cities of California. Our team specializes to guide you in the permit process for the places of getting customized, such as the backyard cottages to the huge guest house, designed to increase the value and functionality of your property. Whether you want to get permits for small homes, garage conversions, or multi-family ADU, we provide adapted solutions to your needs. With years of experience, we ensure that each project follow local rules and also streamlines the permit process to make your project quick and efficiently approve.

ADU Projects
ADU Builders
ADU Projects

Discover Inspiring Fortune ADU Projects in California

We offer expert ADU permit services for all types of projects across California-from modern layout and garage conversion to custom-made and multi-so-in-law ADU. Whether it is a comfortable backyard unit in Sunvel, Malibu has a guest house, or a small house in Los Angeles or San Diego, we simplify the permits process and ensure complete compliance. When you are realizing your ADU vision, we will handle the paperwork.

Smart Living ADU
Windmill ADU | Elegant Smart Living
Modern ADU
Affordable Modern Ranch-Style ADU
Green Suburban ADU Home
Green Suburban ADU Home

Top Reasons ADU Permits Get Denied and How to Avoid Them

1. Zoning and Land Use Restrictions

Reason: Some lots may not meet local zoning or land use requirements for ADU construction.

How to Avoid: Review your city or county’s ADU zoning regulations before planning. Work with a local architect or permit specialist familiar with ADU laws.

2. Incomplete or Incorrect Permit Application

Reason: Missing documents, inaccurate drawings, or outdated forms can delay or deny your permit.

How to Avoid: Double-check all application materials and ensure your site plan, floor plan, and structural details meet city requirements.

3. Building Code Violations

Reason: Design plans that do not meet California Building Code standards (e.g., ceiling height, fire safety, egress) are often rejected.

How to Avoid: Hire a licensed contractor or architect who specializes in ADU design and construction.

4. Utility Access and Infrastructure Issues

Reason: Lack of access to water, sewer, or electrical connections can lead to denial. 

How to Avoid: Coordinate with utility providers early in the process to confirm availability and any required upgrades.

5. Setback and Lot Coverage Violations

Reason: ADUs that exceed allowable square footage, height limits, or encroach on required setbacks may not be approved.

How to Avoid: Use a professional to create a site plan that adheres to local setback, height, and lot coverage limits.

6. HOA or CC&R Restrictions

Reason: Homeowners associations (HOAs) or Covenants, Conditions & Restrictions (CC&Rs) can impose limits on ADU construction.

How to Avoid: Check with your HOA and review any community restrictions before starting the permitting process.

7. Historic or Environmental Constraints

Reason: Properties in historic districts or environmentally sensitive zones may face extra scrutiny or outright denial.

How to Avoid: Consult with local planning departments to determine if special permits or reviews are needed.

FAQ

What is an ADU?

An ADU (Accessory Dwelling Unit) is a secondary housing unit on a residential lot, often called a granny flat, in-law unit, or guest house. It can be attached or detached from the primary residence.

Do I need a permit to build an ADU permit Sacramento, California?

Yes, you need a permit to build an ADU. However, California has streamlined the process for many ADUs, making it easier and faster to get approval.

What are the size requirements for an ADU permit San Diego?

The size of an ADU in San Diego varies depending on the zoning laws of your city or county. Generally, it can range from 500 to 1,200 square feet, with limits on height, setbacks, and floor area ratios.

What are the setback requirements for an ADU?

Setback requirements vary depending on your location and whether the ADU is attached or detached. Typically, there are minimal setback requirements for detached ADUs, especially if they are within a certain size.

What are the costs for obtaining an ADU permit?

Permit fees for an ADU vary by city and county. In general, you will need to account for building permits, impact fees, and potential utility connection fees.

How long does it take to get an ADU permit Bay Area, California?

The approval process for ADU permits can range from a few weeks to a few months, depending on local regulations and the complexity of the project. Many cities have expedited processes for simpler designs.

What is the difference between an ADU and a junior ADU (JADU)?

A Junior ADU (JADU) is a smaller unit (up to 500 square feet) that is typically within the existing footprint of a single-family home, like converting a bedroom into a separate living space. ADUs can be standalone units or attached to the home.