Garage Conversion to ADU in Huntington Beach, CA
Transform your underutilized garage into a valuable living space with Refined ADU Builder & Garage Conversions, Huntington Beach's premier garage conversion to ADU specialists. We turn ordinary garages into extraordinary accessory dwelling units that add significant value to your property while creating versatile living solutions for your unique needs.
Our comprehensive approach covers every aspect of the conversion process—from initial concept and architectural design to permit acquisition and final construction. With completion times of 3-6 months, our efficient process delivers outstanding results while respecting your timeline and budget.
Huntington Beach's favorable ADU regulations make garage conversions an excellent investment opportunity, with potential ROIs of 70-100% through increased property value and monthly rental income. Our local expertise ensures your conversion meets all building codes and zoning requirements while maximizing your available space.
Whether you're seeking additional rental income, accommodating extended family, creating a home office, or establishing a separate living space for aging parents, our experienced team delivers thoughtful solutions tailored to your specific goals. We handle all necessary permits, structural modifications, utility connections, and interior finishes to create a comfortable, functional living space that seamlessly integrates with your property.
Contact Refined ADU Builder & Garage Conversions today
to transform your garage into the ADU of your dreams.
Our Conversion Services
We focus on detailed evaluations at every project stage to ensure quality and compliance. Our inspections help identify risks early, maintain consistent standards, and verify final outcomes.
Comprehensive ADU Design and Planning
Our process begins with an in-depth evaluation of your existing garage structure. We assess spatial layout, structural integrity, and potential for natural light and ventilation. This lets us create a customized design that maximizes livable space while maintaining comfort and efficiency.

We collaborate closely with you to choose finishes, fixtures, and floor plans that fit your lifestyle and budget. Our designs meet local zoning laws in Huntington Beach, including setback and height restrictions. We also plan for efficient utility connections, ensuring the ADU integrates seamlessly with your property.
Permitting and Compliance
Navigating the permitting process in Huntington Beach requires expertise due to specific local building codes. We handle all necessary documentation and communication with city officials to secure approvals for your garage conversion project.

Our team stays current on ADU policies and updates in Huntington Beach, including regulations on parking, occupancy, and utility hookups. We ensure your conversion meets energy efficiency standards and complies with safety codes to avoid delays or penalties.
Full-Service Construction
From groundbreaking to final inspection, we manage every step of construction. We coordinate subcontractors, schedule inspections, and monitor progress to keep your project on time and within budget.

We prioritize quality workmanship, using licensed professionals and trusted materials. Regular updates and site visits keep you informed. Our goal is a smooth, hassle-free experience from start to finish, delivering a safe, durable ADU ready for occupancy.
Benefits of Garage Conversions to ADUs
Converting a garage into an ADU offers practical advantages that extend beyond simple space addition. It enhances the functionality of your property, improves energy use, and can increase its market appeal in measurable ways.
Maximizing Property Value
A well-executed garage conversion to an ADU can significantly raise your home's value. Adding a separate living unit expands the usable square footage without the cost and complexity of new construction.
Properties with ADUs typically attract buyers seeking income potential or multigenerational living options. This flexibility means your investment appeals to a broader market, potentially yielding a higher resale price.
We ensure all conversions meet local zoning laws and building codes, which protects your property's legal standing and safeguards its increased value.
Creating Flexible Living Spaces
Garage conversions provide versatile living environments that cater to various needs. Whether it's a rental unit, home office, or space for aging relatives, adaptability is a key benefit.
We focus on optimizing layouts to maximize comfort and privacy, ensuring the new space functions independently. Soundproofing and separate entrances are common features we include.
This flexibility makes the ADU a sustainable solution for changing family dynamics or financial goals without having to relocate.
Sustainable Solutions
Most garage conversions allow us to integrate up-to-date energy-efficient materials and systems. This can lower utility bills and reduce your home's carbon footprint.
We install insulated walls, energy-efficient windows, and up-to-code HVAC systems designed specifically for smaller living spaces. This approach improves thermal performance and air quality.
Sustainability measures can also qualify your property for potential rebates or incentives, further offsetting costs.
Why Choose Us
We focus on delivering precise garage conversions that meet local regulations, reflect your style, and stay on budget and schedule. Our approach balances technical expertise, design flexibility, and clear communication.
Experienced Technicians
We have deep knowledge of Huntington Beach and California ADU ordinances. This ensures your garage conversion complies with zoning, permit requirements, parking rules, and building codes. Navigating these rules directly impacts project approval and timing. Our team handles all necessary paperwork and inspections to keep your project moving smoothly.
Customization
We work closely with you to design a garage conversion tailored to your needs. This includes space planning, material selection, and finishes that enhance comfort and functionality. Our options cover flooring, lighting, cabinetry, and energy-efficient upgrades. We prioritize high-quality craftsmanship and smart layouts to maximize usable space.
Transparent Timelines
From the start, we provide a detailed schedule and precise cost estimates. This transparency helps you plan ahead without surprises. Our project management tracks progress regularly and communicates updates clearly. We address any changes promptly to keep your project on track.
FAQS on Garage Conversion to ADU
We understand that converting a garage into an ADU involves specific legal and procedural steps. Knowing the required permits helps ensure the project complies with local regulations and proceeds smoothly.
How much does a garage conversion to ADU cost in Huntington Beach?
A garage conversion to ADU in Huntington Beach typically costs between $80,000-$150,000, depending on the size, finish quality, and complexity. Basic conversions start around $80,000, while high-end conversions with premium finishes can exceed $150,000. This includes permits, design, construction, and utility connections.
What permits are required for garage ADU conversions in Huntington Beach?
You'll need a building permit, which requires submitting plans for architectural review, structural engineering, Title 24 energy compliance, and possibly a soils report. Additionally, you may need specific electrical, plumbing, and mechanical permits. The city may also require a planning review to ensure zoning compliance.
How long does a garage to ADU conversion take in Orange County?
The timeline for a garage to ADU conversion in Orange County typically ranges from 3-6 months. This includes 1-2 months for design and permitting, and 2-4 months for construction. Timelines can vary based on project complexity, contractor availability, and city permit processing times.
Are garage conversions to ADUs legal in Huntington Beach?
Yes, garage conversions to ADUs are legal in Huntington Beach. California state law (including AB 68, AB 881, and SB 13) requires cities to permit garage conversions to ADUs with streamlined approval processes. Huntington Beach has aligned its local ordinances with these state requirements.
What's the ROI on converting my garage to an ADU in Huntington Beach?
Converting a garage to an ADU in Huntington Beach typically offers an ROI of 70-100% on construction costs through increased property value. Additionally, monthly rental income can range from $1,800-$2,500, potentially providing a 10-15% annual return on investment. The ADU can also increase your property's marketability and provide flexibility for multi-generational living.