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Are you looking to add value and functionality to your home in San Marino? Pros ADU Builders is here to make your Accessory Dwelling Unit (ADU) dreams a reality. Follow these simple steps to get started today:

Step 1: Consultation

Contact us at (888) 545-6521 to schedule a consultation with our expert team. We will assess your property, discuss your needs, and provide personalized recommendations.

Step 2: Design & Planning

Our experienced designers will work with you to create a custom ADU design that complements your existing home and meets your requirements. We handle all the necessary permits and approvals for a hassle-free process.

Step 3: Construction

Once the design is finalized, our skilled builders will bring your vision to life with high-quality construction services. Sit back and relax as we transform your property into a stylish and functional ADU.

Pros ADU Builders is the premier choice for ADU construction in San Marino. Here’s why you should choose us for your project:

  • Expertise: With years of experience in the industry, we have the knowledge and skills to deliver exceptional results.
  • Quality: We use top-quality materials and employ skilled craftsmen to ensure the highest level of craftsmanship in every project.
  • Customer Service: Our dedicated team is committed to providing excellent customer service and keeping you informed throughout the entire process.

What is an ADU?

An Accessory Dwelling Unit (ADU) is a secondary housing unit that can be built on the same lot as a primary residence. ADUs are a great way to add living space or rental income to your property.

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

Yes, you will need to obtain a permit from the City of San Marino before constructing an ADU. Pros ADU Builders will handle all the permit applications on your behalf.

While we work on enhancing your property with a beautiful ADU, take some time to explore the charming city of San Marino. Don’t miss these top sights:

  • The Huntington Library, Art Museum, and Botanical Gardens
  • Lacy Park
  • Old Mill Foundation
  • The Gamble House

Contact Pros ADU Builders at (888) 545-6521 to get started on your ADU project in San Marino today!

(888) 545-6521

Contact Pros ADU Builders today for a free ADU consultation and quote. Let’s bring your vision to life!

Ready to Expand Your Space?

(888) 545-6521
About Us

About us

Pros ADU Builders is a team of passionate local experts specializing in Accessory Dwelling Unit construction. We’re not just builders — we’re problem solvers who care about your property, goals, and lifestyle. Whether you're creating a backyard rental unit or housing for extended family, we guide you through every step, from planning to move-in. With a focus on quality materials, reliable timelines, and customer satisfaction, we deliver custom ADU builds that meet both your budget and city codes. When you hire us, you're hiring a neighbor who truly understands the value of space, privacy, and smart investment.

Know More About Us

Turnkey ADU Solutions

From permits to paint, we manage every detail so you don’t have to.

Locally Licensed & Code Compliant

Built to pass inspection and stand the test of time.

Custom Designs for Any Property

Backyard, garage, or detached—tailored builds that match your home’s style.

Built By Neighbors You Can Trust – Derek, Marla, Jayson, and Lena at Pros ADU Builders

(888) 545-6521