ADU Builder San Leandro
Custom, High-Quality Accessory Dwelling Units
Are you looking to build an Accessory Dwelling Unit (ADU) in San Leandro, 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 San Leandro, 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 San Leandro 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 Sunnyvale'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 San Leandro
Below is an overview of ADU regulations in San Leandro. If you need more details on how these rules apply to your property, contact us to get connected with an ADU expert.
Where ADUs Are Allowed
ADUs are generally permitted on residentially zoned properties, though exceptions may apply. Your property must include an existing or planned single-family home or a multi-family building, such as a duplex, triplex, or apartment complex. Reach out to 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
Single-family homes can typically accommodate one or two ADUs. Multi-family properties may be eligible for multiple ADUs depending on the number of existing units and the type of ADU being built. Get in touch with our team to find out how many ADUs your property can support.
Parking Requirements
Conversion and junior ADUs generally do not require additional parking. However, attached and detached ADUs typically require at least one parking space unless an exemption applies. Reach out to us for expert guidance on San Leandro’s ADU parking regulations.
Featured Project
ADU Builder San Leandro FAQs
How long does it take to build a secondary unit in San Leandro?
On average, the process takes 8 to 12 months, including 1–2 months for design, 2–4 months for permitting, and 4–6 months for construction. Properties with older infrastructure or complex terrain may require additional time.
What’s the average cost to build a backyard home in San Leandro?
Most compact dwellings cost between $450 and $500 per square foot. A 750 sq. ft. guest suite or granny flat may start at $340,000, while larger or more custom-built units can exceed $475,000. Permit fees, site prep, and utility upgrades will add to the total.
Can the new unit share utilities with the main house?
Yes. These smaller homes often use existing water, sewer, and electrical connections. For rental units, separate meters may be preferred for billing purposes. If your home is older, an electrical panel upgrade could be necessary.
Are there sustainability or energy-efficiency incentives available?
Definitely. San Leandro homeowners can take advantage of BayREN rebates, solar energy incentives, and discounts for EV chargers and efficient appliances. All construction must meet California Title 24 energy standards, and smaller units under 750 sq. ft. are typically exempt from impact fees.
Why are more people adding compact homes to their properties?
Adding a secondary suite is a practical way to create space for extended family, long-term guests, or rental income. It’s also an increasingly popular option for multigenerational living or those wanting to downsize while staying on the same property.
Is there strong demand for these types of dwellings in San Leandro?
Yes. With limited housing availability and increasing costs, many homeowners are building garage conversions, backyard cottages, or detached in-law units to meet changing lifestyle and financial needs.
What types of designs are popular?
Local homeowners tend to prefer modern studios, traditional Craftsman cottages, and garage-to-apartment conversions. Common features include open layouts, smart home technology, private entries, and outdoor patios.
Where can I find local guidance for planning and permits?
The San Leandro Community Development Department provides online access to zoning regulations, application checklists, and design guidelines. You can also contact staff directly for help reviewing your lot’s eligibility.
How do these homes affect the surrounding neighborhood?
When designed thoughtfully, these small dwellings integrate well into existing residential areas. San Leandro enforces standards for setbacks, privacy, and architectural compatibility to ensure that new construction aligns with neighborhood character.
Do I need to add parking for the new unit?
In many cases, no extra parking is required, especially if the space is within ½ mile of public transit or part of a converted garage or existing structure. Otherwise, you may be asked to provide one off-street space depending on your lot and layout.
Service Areas
Want to build your own ADU but don't know how to start?
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