How can I get a quote for my ADU project?

Fill out our contact form or call us at (714) 927-9777 for a free, no-obligation consultation and quote.

OcAduStudio - Southern California's ADU ExpertsOcAduStudio

ADU Interior — OC AduStudio Orange County CA

5+

Years of
Experience

About Us

Building Quality ADUs
With Passion & Precision

OC AduStudio is a full-service design and build firm specializing in Accessory Dwelling Units across California. We help homeowners unlock the full potential of their property with beautiful, functional, and compliant ADUs.

100+

Projects Completed

100%

Client Satisfaction

5+

Years Experience

Local Expertise

We know California ADU regulations inside out.

End-to-End Service

From design, permits to construction.

Transparent Pricing

No hidden fees. No surprises.

On-Time Delivery

We respect your time and investment.

Learn More About Us

Our Services

Complete ADU Solutions

From initial site evaluation to final move-in, we deliver end-to-end ADU services tailored to your needs.

ADU Laws California

Navigate California's ADU regulations with confidence. We break down zoning laws, setback rules, and 2026 compliance requirements so you build right the first time.

Learn More

ADU Costs & Financing

Understand the true cost of building an ADU and explore your financing options — from construction loans and HELOCs to California state ADU grants.

Learn More

ADU Designs & Floor Plans

Browse curated ADU floor plans tailored to California lots — studio, 1BD, 2BD, garage conversions, and custom architectural designs that fit your lifestyle.

Learn More

ADU Builders Orange County

Work with Orange County's most trusted licensed ADU contractors. We manage every phase of construction — on schedule, on budget, and built to last.

Learn More

Full-Service ADU Solutions

From site evaluation and custom design to permits and final walkthrough — OC AduStudio is your single point of contact for a completely turnkey ADU experience.

Learn More

ADU Rental Strategy & ROI

Maximize your ADU investment. Learn rental pricing strategies, tenant management tips, and how to calculate long-term ROI on your California ADU property.

Learn More

Our Projects

A Glimpse Of Our Work

View All Projects

Detached ADU

Modern Backyard ADU

850 sq ft · Irvine, CA

Attached ADU

Garden Suite

620 sq ft · Anaheim, CA

Junior ADU

Compact Living

400 sq ft · Costa Mesa, CA

Garage Conversion

Urban Studio

550 sq ft · Fullerton, CA

Detached ADU

Pool House ADU

1,100 sq ft · Newport Beach, CA

Explore our complete portfolio of 100+ completed ADU projects across Southern California.

View All Projects

Clients Say

What Our Clients Say

Real stories from homeowners who trusted us with their ADU projects.

"OC AduStudio turned our backyard into a beautiful ADU. The team was professional, responsive, and delivered on time!"

Jennifer L.

Irvine, CA

"From the design to the final build, everything was seamless. Highly recommend OC AduStudio for any ADU project!"

Michael T.

San Diego, CA

"They handled the permits, design, and construction perfectly. Our ADU is amazing and adds so much value to our home!"

Sarah

Valencia, CA

"The whole process was stress-free. OC AduStudio's team kept us informed every step of the way — truly exceptional service!"

David

Valencia, CA

"Outstanding craftsmanship and attention to detail. They turned our vision into reality and we couldn't be happier!"

Robert K.

Anaheim, CA

"We were amazed at how smoothly everything went. Our new ADU is beautiful and exactly what we envisioned. Worth every penny!"

Linda M.

Newport Beach, CA

"The quality of work exceeded our expectations. OC AduStudio delivered a stunning ADU that our family absolutely loves!"

James W.

Fullerton, CA

"Professional, skilled, and genuinely caring team. They transformed our garage into a gorgeous living space. Highly recommended!"

Christine

Costa Mesa, CA

Our Team

Meet The Experts

Talented professionals committed to bringing your ADU vision to life with passion and precision.

Leadership

Oscar C.

Founder & CEO

15+ years in residential construction. Passionate about making ADU living accessible to every California homeowner.

Design

Emily R.

Lead Designer

Award-winning architect with a signature style blending modern aesthetics and California living comfort.

Operations

Jason K.

Project Manager

Keeps every project on schedule and on budget. Expert in coordinating multi-trade construction teams.

Permits

Sophia L.

Permit Specialist

Deep knowledge of CA ADU regulations and city plan-check processes. 300+ successful permit approvals.

Construction

David M.

Construction Lead

Licensed general contractor with 20+ years of hands-on experience in residential builds across SoCal.

Interiors

Laura P.

Interior Designer

Transforms compact ADU spaces into warm, functional homes with a signature California coastal palette.

Frequently Asked Questions

Find clear answers about ADU design, permits, costs, and our full-service process — so you can move forward with confidence.

100+ Projects Completed

5+ Years of Experience

100% Client Satisfaction

Ask Us Anything

01 What is an ADU?

An Accessory Dwelling Unit (ADU) is a secondary housing unit on a single-family residential lot. It can be detached, attached, or a conversion of existing space like a garage.

02 How much does it cost to build an ADU?

Costs vary by location and type, but generally range from $100,000 to $300,000+ depending on size, design complexity, and materials selected.

03 How long does it take to build an ADU?

Typically 6 to 12 months, including design, permitting, and construction phases. Our streamlined process helps minimize delays.

04 Do I need a permit to build an ADU?

Yes, all ADUs require building permits. California law has recently streamlined this process, and our team handles every permit application on your behalf.

05 Can I convert my garage into an ADU?

Absolutely. Garage conversions are one of the most popular and cost-effective ways to add an ADU, typically at a lower cost than new construction.

06 Will an ADU increase my property value?

Yes. Studies show that ADUs can significantly increase property value while also generating rental income — often enough to offset construction costs over time.

07 What types of ADUs can be built?

We build Detached ADUs, Attached ADUs, Junior ADUs (JADUs), and Garage Conversions — tailored to your lot size, budget, and goals.

08 Do you handle the entire process?

Yes. We provide full-service solutions — from initial site evaluation and design through permitting, construction, and final handover.

09 What remodeling services do you offer?

Beyond ADUs, we specialize in kitchen and bathroom remodeling, home additions, and complete interior renovations throughout Southern California.

10 How can I get a quote?

Fill out our contact form below or call us at (714) 927-9777 for a free, no-obligation consultation and quote.

5+

100+

100%

5+

Local Expertise

End-to-End Service

Transparent Pricing

On-Time Delivery

Jennifer L.

Michael T.

Sarah

David

Robert K.

Linda M.

James W.

Christine

Jennifer L.

Michael T.

Sarah

David

Robert K.

Linda M.

James W.

Christine