ADU Contractor in San Ramon – Expand with Purpose, Build with Confidence
San Ramon is a vibrant, family-friendly city in the Tri-Valley area known for its excellent schools, scenic neighborhoods, and thriving business hubs. With increasing demand for flexible living solutions, building an Accessory Dwelling Unit (ADU) in San Ramon is a smart move—whether you’re housing loved ones, working from home, or generating passive income.
At Royalty Builders, we provide complete ADU design and construction services customized for San Ramon homeowners. From initial concept through permits and construction, our team handles it all—ensuring a smooth, efficient experience from start to finish.
Types of ADUs We Build in San Ramon
San Ramon homes range from cozy suburban properties to large estates—each with different potential for adding a fully legal ADU. We’ll help you select the right layout and build type based on your lot, goals, and design preferences.
We build:
Detached ADUs – Standalone backyard homes ideal for privacy, guests, or rentals
Attached ADUs – Integrated additions that enhance your home’s functionality
Garage Conversions – Cost-effective way to repurpose existing space into living quarters
Above-Garage ADUs – Maximize your vertical space with a stylish studio or suite
Basement ADUs – Great for homes with split-level or hillside layouts
All ADUs are built to San Ramon’s local ordinances and Contra Costa County standards, ensuring comfort, compliance, and long-term value.
Full-Service ADU Design + Build in San Ramon
At Royalty Builders, we streamline your project with a full design-build process, so you only need one expert team from beginning to end. This eliminates miscommunication, delays, and stress—giving you peace of mind and outstanding results.
Our turnkey service includes:
Property and zoning analysis
Custom architectural and structural design
Energy compliance (Title 24) and civil engineering
Full permit handling with the City of San Ramon
High-quality construction and on-site project management
Final inspection, utility coordination, and occupancy approval
We manage every step, so you can focus on how you’ll use your new space.
How Much Does It Cost to Build an ADU in San Ramon?
San Ramon ADUs are an investment that pays off in increased home value, expanded use, and future-proof living. We provide clear, customized quotes based on project scope, finishes, and lot conditions.
Typical ADU pricing in San Ramon:
Garage Conversion: $125,000 – $180,000
Attached ADU: $190,000 – $300,000
Detached ADU: $225,000 – $375,000+
Above-Garage ADU: $240,000 – $400,000+
We also offer guidance on financing solutions, including renovation loans and ADU-focused equity programs.
Permits for ADU Construction in San Ramon – What You Need to Know
San Ramon follows California’s streamlined ADU laws while maintaining its own city-specific planning and design guidelines. Our experienced team works directly with San Ramon’s Planning and Building Departments to keep your project moving smoothly.
We handle:
Lot eligibility and setback analysis
Architectural submissions and corrections
Communication with city staff and inspections
Fire safety, utility coordination, and code compliance
Final occupancy certification
We make sure your ADU project is fully legal, beautifully built, and move-in ready.
Why Build an ADU in San Ramon?
With top-ranked schools, family-focused neighborhoods, and strong property values, San Ramon is an ideal city to invest in a high-quality ADU. Whether your goal is to host family, work from home, or earn rental income, an ADU offers lasting benefits.
Here’s why more homeowners in San Ramon are building ADUs:
🏠 Private housing for extended family or guests
💼 Dedicated home office or creative studio
💰 Rental income from a legal, self-contained unit
📈 Boost in home value and resale appeal
🔁 Future flexibility for multigenerational or aging-in-place living
ADUs make your home more versatile—and more valuable.
Frequently Asked Questions – ADUs in San Ramon
Q: How large can my ADU be in San Ramon?
A: Most detached ADUs can be up to 1,200 sq. ft., depending on your lot size, setbacks, and design. We’ll confirm your site’s potential during consultation.
Q: Do I need to provide extra parking?
A: In many cases, no. Parking may be waived if your property meets certain criteria, such as proximity to public transit.
Q: Can I rent out my ADU?
A: Yes, long-term rentals are permitted in fully permitted ADUs. We’ll ensure your project is code-compliant for rental use.
Q: How long does it take to build an ADU in San Ramon?
A: Most projects take 6–10 months from planning to completion. We provide a custom project timeline based on your ADU type and site conditions.
Contact Royalty Builders – San Ramon’s Local ADU Experts
Whether you’re adding space for family, building a rental unit, or planning for the future, Royalty Builders is your trusted partner for ADU construction in San Ramon. We offer experience, craftsmanship, and service that go beyond expectations.
📞 Contact us today and schedule your free ADU consultation in San Ramon.
Space that works. Design that lasts. Built with Royalty.
Our Additional Services - Royalty Builders
Our Latest Reviews


