Located just south of San Francisco, Brisbane offers small-town charm, hillside views, and quick access to the Bay Area’s best amenities. With limited housing inventory and rising demand for flexible living, Accessory Dwelling Units (ADUs) are a smart solution for homeowners who need more space—without leaving the neighborhood they love.

At Royalty Builders, we specialize in building custom ADUs in Brisbane, designed to match your home’s architecture and your lifestyle. Whether you’re adding a backyard rental unit, a guest suite, or a private home office, we provide full-service design, permitting, and construction to bring your vision to life—seamlessly.

🛠️ Full-Service ADU Design + Build in Brisbane

Our team handles the entire process under one roof. That means less stress, better communication, and a beautifully built ADU that meets your goals—and Brisbane’s requirements.

✅ Site Evaluation & Feasibility Review – We assess setbacks, grading, access, and zoning
✅ Custom ADU Design – Tailored to your property, budget, and aesthetic
✅ Permit Application & Coordination – We handle every step with the City of Brisbane
✅ Licensed Construction – Built with precision, premium materials, and long-term durability
✅ Final Inspections & Move-In Ready Finish – Fully code-compliant and ready for use

Whether you’re in The Ridge, Central Brisbane, or on a sloped lot, we’ll help you maximize your property’s potential with an ADU designed just for you.

🧱 Types of ADUs We Build in Brisbane

We offer a wide range of ADU solutions that adapt to your property’s layout and purpose:

• Detached ADUs – Standalone cottages perfect for long-term rentals, guests, or family

• Garage Conversions – Turn underutilized garages into fully livable, functional units

• Attached ADUs – Add a private wing to your home with a separate entrance

• Above-Garage ADUs – Make use of vertical space without sacrificing yard area

• Junior ADUs (JADUs) – Compact in-home units with kitchenette and shared bath access

We’ll help you determine which ADU type is right for your lot—and design it to blend beautifully with your home.

📍 Why Build an ADU in Brisbane?

Brisbane’s unique mix of residential charm and hillside landscapes makes it a prime location for adding an ADU. Whether your goal is added income, flexibility, or space for loved ones, the benefits are clear:

✔️ Earn Rental Income – Brisbane’s tight rental market means consistent demand
✔️ Support Multi-Generational Living – Give family members independence while staying close
✔️ Create a Work-From-Home Retreat – Build a separate space for focus and productivity
✔️ Increase Property Value – Add square footage and long-term appeal
✔️ Comply with California’s Pro-ADU Laws – Faster reviews, reduced restrictions, and state incentives

💲 How Much Does an ADU Cost in Brisbane?

Costs for ADU construction in Brisbane vary based on lot conditions, grading (especially on hills), access, and the type of unit. Here’s what you can generally expect:

• Garage Conversions: starting at $95,000–$160,000

• Detached ADUs: typically $225,000–$425,000+

• Attached ADUs: range from $175,000–$325,000

• Above-Garage ADUs: may range from $250,000–$400,000+, especially with hillside reinforcement

📌 We provide detailed, transparent estimates tailored to your specific property and help you make informed decisions every step of the way.

📝 Permits for ADU Construction in Brisbane – What You Need to Know

The City of Brisbane aligns with California’s state ADU laws, but also enforces local zoning and building standards—especially important given the city’s hillside terrain and view protection ordinances.

At Royalty Builders, we have experience navigating Brisbane’s building department, ensuring your project moves smoothly from idea to occupancy.

Here’s how we handle it:

🔹 Zoning & Site Review
We confirm setbacks, height limits, and whether your lot is in a Hillside Overlay Zone, which may require additional review for grading or slope stability.

🔹 Design Approval & Permit Submission
We prepare full architectural plans, site plans, Title 24 energy compliance reports, and engineering documents. We submit all plans to the Brisbane Community Development Department.

🔹 Plan Check & Corrections
If adjustments are needed for fire safety, view corridors, or slope, we handle revisions quickly and keep the timeline on track.

🔹 Permit Issuance & Inspections
Once approved, we obtain permits and begin construction. We coordinate inspections until your project is signed off and ready for move-in.

✅ Brisbane follows California’s ADU law, which includes:

• Approval within 60 days of a completed application

• 1,200 sq. ft. maximum for detached ADUs

• Parking waivers in many cases, especially for garage conversions or homes near transit

We manage the details, so you can focus on your vision—not city paperwork.

👷 Why Choose Royalty Builders as Your Brisbane ADU Contractor?

In a hillside city like Brisbane, attention to detail, site preparation, and architectural sensitivity are critical. Royalty Builders brings years of experience, technical know-how, and a passion for quality construction to every ADU project.

• 🏗️ Complete Design + Build Service

• 📍 Experience with Brisbane’s Hillside and Planning Regulations

• 🛠️ Premium Craftsmanship, Built to Last

• 📋 Transparent Bidding and Realistic Timelines

• 🧑‍💼 Personalized Project Management

We don’t just build extra space—we build lasting value and functionality that complements your home and lifestyle.

❓ FAQ – ADUs in Brisbane

Q: Can I build an ADU on a sloped lot in Brisbane?
A: Yes, but hillside lots may require additional structural work or geotechnical reports. We evaluate and plan accordingly.

Q: Do I need parking for my ADU?
A: In many cases, no. Brisbane waives parking requirements if the ADU is within 0.5 miles of transit or replaces a garage.

Q: Can I rent out my ADU in Brisbane?
A: Yes, long-term rentals are allowed. Short-term rental rules should be confirmed with the city.

Q: Can I build both an ADU and a JADU?
A: Most single-family lots allow both, subject to size and layout. We’ll review your options with you during the planning phase.

📞 Contact Us – Build Your Brisbane ADU with Royalty Builders

Whether you’re building to accommodate family, earn rental income, or simply enjoy more space, Royalty Builders is here to make the process smooth, professional, and rewarding.

📞 Call us and schedule your free consultation

Let’s design and build an ADU in Brisbane that fits your home—and your future—perfectly.