ADU Builder Palo Alto
Custom, High-Quality Accessory Dwelling Units
Are you looking to build an Accessory Dwelling Unit (ADU) in Palo Alto, CA?
Keep Your Family Close with a Custom ADU
Whether you want to create a comfortable space for aging parents, independent living for adult children, or a guest house for extended family, ADU Builders Group is your trusted ADU builder in Palo Alto, California.
With over 20 years of experience, we specialize in designing and constructing high-quality, custom-built ADUs that strengthen family bonds, enhance multigenerational living, and improve your lifestyle while ensuring compliance with local building regulations.
Build with Peace of Mind
We are the only ADU company in Palo Alto that offers a three (3) years project warranty on our services with complementary annual project inspection. All of this on top of the ten (10) years warranty on structural components.
✔ 3 Years Project Warranty
✔ Complimentary Annual Inspection
✔ 10 Years Structural Warranty
Why Choose Us?
1. Peace of Mind with Industry-Leading Warranties
✅ 3 Years Project Warranty – We stand by our craftsmanship, ensuring any issues within the first three years are addressed promptly and professionally.
✅ Free Annual Inspection – Our commitment to quality extends beyond project completion, we provide a free annual inspection, for the first three years after project completion, to ensure your ADU remains in excellent condition.
✅ 10 Years Structural Warranty – Our ADUs are built to last, and we back them with a decade-long structural warranty, giving you confidence in the longevity of your investment.
2. Expert Guidance & Hassle-Free Process
✅ Permitting & Compliance Experts – Navigating Palo Alto's ADU regulations can be complex, but our experienced team ensures a smooth approval process, handling all paperwork and city requirements to prevent costly delays.
✅ 20+ Years of Construction Expertise – With decades of expertise in the construction industry and a dedicated focus on ADUs for over five years, we bring the knowledge, efficiency, and craftsmanship necessary to deliver high-quality results every time.
✅ Fast & Efficient Construction – Our streamlined process and skilled project management ensure your ADU is completed on time without unnecessary disruptions to your daily life.
3. Superior Craftsmanship & Custom Designs
✅ Aging-in-Place & Accessibility Features – Our ADUs are designed with the future in mind, incorporating accessibility features such as wider doorways, step-free entrances, and senior-friendly layouts for long-term convenience.
✅ Tailored Solutions for Every Home – Every family’s needs are unique, which is why we create custom ADU designs that maximize space efficiency, match your home’s aesthetics, and fit your lifestyle.
✅ High-Quality Materials & Precision Engineering – We use only top-tier materials sourced from our trusted, high-quality suppliers, ensuring that your ADU is durable, safe, and built to last for generations.
4. A Lifestyle Solution for Your Family's Needs
✅ Keep Loved Ones Close – Give elderly parents or adult children a private yet nearby living space, ensuring family members stay connected while maintaining their independence.
✅ Multigenerational Living Made Easy – Whether it's providing a comfortable home for aging parents or giving young adults a head start, our ADUs foster a supportive and practical living arrangement.
✅ Enhance Your Home’s Functionality – More than just extra space, an ADU can serve as a dedicated home office, personal gym, creative studio, or even a guest house for visiting relatives and friends.
About Us
Partners and Affiliations
ADU Builders Group Inc.
ADU Builders Group is a local, family-owned company dedicated to providing innovative solutions to California’s housing crisis, with passion for helping multigenerational families. Having high regards to family-oriented values, our work reflects a deep commitment to creating practical, high-quality custom ADUs that bring loved ones closer while respecting privacy and independence. With heart, craftsmanship, and a focus on community, we build homes that inspire and unite.
✔ Proudly Local
✔ Family-Owned
✔ Licensed and Insured
A Partner & Sister-Company of
Imagine Unique Remodels
Our Services and Expertise
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What's The Best Type of ADU for You?
Our Process
Consult with our ADU Experts
1
To start, discuss your needs, goals, and vision for your ADU with our experts. Start by having a phone consultation with us at (408) 413-3373. We'll set your schedule for the in-person meeting during the call. You'll receive expert recommendations and estimate for your ADU during the consultation phase at no cost.
2
Design with our Architect
Need to customize your ADU based on your needs and requirements? Design your own ADU and turn your ideas into an architectural plan with our Architect.
4
Construct & Pass Inspections
Our Project Managers will be in constant communication with you during construction and will ensure that your projects pass all inspections.
3
Obtain Permits Effortlessly
Our Liaison Officer will take care of the permits for you and work with the city to ensure that all paperworks are in place quickly and efficiently.
5
Enjoy and Maintain your ADU
Live the lifestyle you want and be worry-free. We'll continue to provide support and care to your project with our warranties and annual project inspection.
Local ADU Regulations in Palo Alto
Below is an overview of Palo Alto’s ADU regulations. If you need more details about how these rules apply to your property, reach out to us to connect with an ADU expert.
Where ADUs Are Allowed
ADUs are generally permitted on properties designated for residential use, although some exceptions may apply. Your property must have an existing or planned single-family home or a multi-family building, such as a duplex, triplex, or apartment complex. Contact us to determine whether your property qualifies for an ADU.
Minimum Lot Size
There are no minimum lot size restrictions—any property, regardless of its dimensions, may be eligible for an ADU.
Number of ADUs Allowed
Most single-family homes can accommodate one or two ADUs. Multi-family properties may qualify for additional ADUs, depending on the number of existing units and the type of ADU being constructed. Get in touch with our team to learn how many ADUs your property can support.
Parking Requirements
Conversion and junior ADUs generally do not require additional parking. However, attached and detached ADUs usually need at least one parking space unless an exemption applies. Reach out to us for expert advice on ADU parking requirements in Palo Alto.
Featured Project
ADU Builder Palo Alto FAQs
How long does it take to build a guest house or in-law suite in Palo Alto?
Most projects take 9 to 14 months from start to finish. This includes 1–2 months for architectural design, 3–5 months for permitting and review, and 4–6 months for construction. Homes in historic zones or on narrow lots may require additional time for city approvals.
What’s the typical cost to build a compact secondary dwelling?
Construction costs in Palo Alto often range from $500 to $575 per square foot, reflecting high-quality materials and labor. A 750 sq. ft. backyard cottage or granny flat may start around $400,000, while larger, custom-built units can exceed $600,000. Don’t forget to budget for permit fees, utility upgrades, and landscaping.
Can the new unit use existing utilities from the main home?
Yes. Most secondary suites are connected to the home’s existing water, sewer, and electric systems. If you plan to rent the space or prefer utility separation, individual meters may be installed. Older properties may also need panel or plumbing upgrades to meet current codes.
Are there energy-efficiency rebates or green building incentives?
Yes. Palo Alto offers local sustainability programs, and homeowners may also qualify for BayREN rebates, solar energy incentives, and EV charger support. All new structures must meet California’s Title 24 energy code, and units under 750 sq. ft. are often exempt from impact fees.
Why are Palo Alto residents building secondary homes?
These compact living spaces offer flexibility and privacy for family members, caregivers, guests, or home-based professionals. They also help address local housing needs and allow residents to stay in place while adapting to lifestyle changes.
Is there strong interest in guest cottages or backyard flats in Palo Alto?
Yes. With the area’s limited housing inventory and high demand, many homeowners are adding converted garages, modern garden studios, or detached suites to maximize their property and create long-term value.
What types of designs are popular in Palo Alto?
Popular styles include mid-century modern, California contemporary, and minimalist cottages that complement the main home. Homeowners often prioritize smart tech, energy-efficient features, natural light, and private outdoor access.
Where can I find local guidance on permits and zoning?
The City of Palo Alto’s Planning Division offers access to zoning maps, development standards, permit requirements, and design guidelines online. You can also schedule a pre-application consultation to discuss your property’s specific opportunities and limitations.
Will adding a compact home affect neighborhood character?
Not significantly. Palo Alto has clear guidelines to ensure new construction respects neighborhood scale, privacy, and aesthetics. These small homes provide gentle housing growth while preserving the architectural integrity of established neighborhoods.
Do I need to provide extra parking for the new living space?
Not always. If the unit is within ½ mile of public transit, or you're converting an existing space like a garage, no additional parking is required. Otherwise, you may need to provide one off-street parking space, depending on your lot and layout.
Service Areas
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