As housing needs evolve and space becomes more valuable, Hayward homeowners are increasingly turning to Accessory Dwelling Units (ADUs) to solve modern living challenges. Whether you’re adding a rental unit, a guest house, or a private space for family, building an ADU is a smart investment that increases both livability and long-term value.

At Royalty Builders, we specialize in ADU design and construction across the Bay Area. We bring local expertise, transparent pricing, and start-to-finish service to homeowners in Hayward who want to make the most of their property.

Types of ADUs We Build in Hayward

We understand that every property and homeowner in Hayward is unique, which is why we offer multiple types of ADUs to fit your needs, space, and budget. Whether you’re looking for a cozy backyard cottage or a fully equipped in-law suite, we’ll help you choose the right solution.

Our ADU types include:

• Detached ADUs – Standalone units ideal for rentals, guests, or multigenerational living

• Attached ADUs – Built as extensions to the main house, perfect for seamless family use

• Garage Conversions – Efficient, affordable way to create a livable unit from an underused space

• Above-Garage ADUs – Smart vertical builds for maximizing square footage

• Basement Conversions – Transform lower levels into beautiful and legal living areas

Every unit is custom-designed to meet your vision and fully comply with Hayward zoning laws.

Full-Service ADU Design + Build in Hayward

Royalty Builders offers a complete design-build experience, eliminating the stress of coordinating multiple vendors or managing permits on your own. From initial planning through final inspection, we’re with you every step of the way.

Here’s what we handle:

• In-depth site assessment and zoning review

• Architectural design and 3D modeling

• Structural planning and energy compliance

• Permit application and processing with the City of Hayward

• Full construction, utility connections, and final inspection

You’ll get a dedicated project manager, a clear timeline, and real-time updates—so you stay in control while we handle the details.

How Much Does It Cost to Build an ADU in Hayward?

ADU construction costs vary based on lot conditions, design complexity, materials, and size. Royalty Builders provides detailed, honest pricing at every stage to ensure no hidden fees or budget surprises.

Typical price ranges in Hayward:

• Garage Conversion: $120,000 – $170,000

• Attached ADU: $180,000 – $290,000

• Detached ADU: $200,000 – $350,000+

• Above-Garage Unit: $220,000 – $360,000

Need financing? We’ll help you explore cost-effective options and structure the project to fit your budget.

Permits for ADU Construction in Hayward – What You Need to Know

Navigating ADU permits in Hayward requires an understanding of local building codes, zoning rules, and California state legislation. Our team takes care of everything—from paperwork to approvals.

We manage:

• Site eligibility review

• Setback, height, and lot coverage analysis

• Submission of architectural and engineering plans

• Response to plan check feedback from the City of Hayward

• Scheduling inspections and securing final sign-off

We’ve worked with Hayward’s permit department and know how to move your project forward—efficiently and legally.

Why Build an ADU in Hayward?

Hayward is one of the East Bay’s most centrally located cities, offering easy access to San Jose, Oakland, and San Francisco. With growing demand for flexible housing and a strong rental market, building an ADU in Hayward is a strategic way to enhance your property’s potential.

Here’s why homeowners are building ADUs in Hayward:

• 🏠 More space without moving – perfect for family, guests, or caregivers

• 💼 Work-from-home solutions – build a quiet studio or office

• 💸 Rental income potential – turn your backyard into a steady revenue stream

• 📈 Increased resale value – homes with ADUs are in high demand

Hayward supports ADU construction with zoning flexibility, reduced parking requirements, and faster permit processing—making now a great time to build.

Frequently Asked Questions – ADUs in Hayward

Q: What is the maximum size for an ADU in Hayward?
A: Detached ADUs can be up to 1,200 sq. ft. depending on lot size and zoning. Our team will confirm what’s possible for your specific property.

Q: Are there parking requirements for ADUs in Hayward?
A: In many areas, no. State law waives parking if your home is near public transit or you’re converting an existing structure like a garage.

Q: How long will the project take from start to finish?
A: Most ADU builds in Hayward take 6–10 months, including design, permitting, and construction.

Q: Can I legally rent out my ADU in Hayward?
A: Yes. ADUs in Hayward can be rented out as long-term rentals, provided they meet all code requirements. We make sure your unit is fully compliant.

Contact Royalty Builders – Let’s Build Your Hayward ADU

Ready to expand your living space, increase your home’s value, or create a rental opportunity? Royalty Builders is your trusted partner for ADU projects in Hayward and throughout the East Bay.

📞 Call us today and schedule your free ADU consultation in Hayward.

Beautiful. Functional. Compliant. Let’s build something great together.