Want to expand your living space in in the South Bay area without the complexity of a traditional home addition? An Accessory Dwelling Unit (ADU) is a flexible, modern solution that adds value, versatility, and comfort to your property.
At Heartwood Residential Design + Build, we’re passionate about creating custom ADUs that not only meet regulations but also align beautifully with your lifestyle and goals.
Your ADU Simplified
At Heartwood Residential, we simplify your ADU project by managing both design and construction under one roof. Whether it's a detached unit, garage conversion, or attached structure, we create custom ADUs that seamlessly enhance your home.
We handle zoning, setbacks, and junior ADU guidelines so you don’t have to. We're more than builders; we’re your trusted partner in creating a space that fits your home, your needs, and your life.
Streamlined ADU Solutions
At Heartwood Residential Design + Build, we make building an ADU in the South Bay area simple, personalized, and stress-free. We offer transparent estimates, expert guidance on design and materials, and a streamlined process that ensures your ADU meets both your needs and county regulations.
Ready to enhance your home and lifestyle with a custom ADU? Contact Heartwood Residential Design + Build to schedule your consultation—we’ll bring your vision to life with quality, care, and clarity.
Frequently Asked Questions
What is the Cost of an ADU in the South Bay Area?
The cost of building an ADU in the South Bay area can vary based on the size, design, and materials you choose, but that also means you have the flexibility to tailor it to your budget and vision.
While ADUs are often seen as a cost-effective way to add space or generate rental income, creating one that meets zoning requirements and feels like a true extension of your home takes thoughtful planning and coordination.
The real beauty of an ADU lies in its versatility; it can serve as a guest house, a rental unit, a home office, or a space for family, all customized to fit your unique needs.
Do I Need a Permit to Build an ADU in California?
In the South Bay Area, building an ADU requires a permit. But with Heartwood Residential, you don’t have to navigate the process alone. Our team’s in-depth knowledge of local permitting ensures a smoother, faster experience from start to finish, so you can focus on the vision while we handle the details.
What Is the Difference Between an ADU and a Room Addition?
An ADU is much more than just an extra room—it’s a fully independent living space.
In the South Bay area, an ADU is required to include its own kitchen, bathroom, and dedicated areas for living, sleeping, and dining, making it a true self-contained home.
Unlike a standard room addition, which simply expands your existing layout, an ADU offers the comfort, privacy, and functionality of a complete residence—perfect for guests, extended family, or rental opportunities.
What is the Minimum Size for an ADU in California?
ADUs in California come in a variety of sizes depending on local regulations, giving homeowners plenty of flexibility. In Santa Clara County, for example, a junior ADU can be as compact and efficient as 500 square feet, perfect for creating a cozy, self-contained space that meets your needs without requiring a large footprint.
What is a Cost-Effective Way to Build an ADU in California?
Smaller ADUs offer one of the most affordable ways to get started. With a more compact footprint, you can save on materials, labor, and overall project costs while still creating a highly functional, efficient space tailored to your needs.
Are you looking for a team that can build the ADU you need and navigate regulations with ease? Heartwood Residential Design + Build is here to make the process easy and enjoyable!