ADU Builder Milpitas
Custom, High-Quality Accessory Dwelling Units
Are you looking to build an Accessory Dwelling Unit (ADU) in Milpitas, 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 Milpitas, 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 Milpitas 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 Milpitas' 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
.jpeg)
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 Milpitas
Below is an overview of ADU regulations in Milpitas. For details on how these guidelines apply to your property, reach out to us to connect with an ADU expert.
Where ADUs Are Allowed
ADUs are typically permitted on properties zoned for residential use, though exceptions may apply. To qualify, 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 confirm whether your property meets ADU requirements.
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 properties can generally add one or two ADUs, while multi-family properties may qualify for multiple ADUs based on the number of existing units and the type of ADU built. Get in touch with our team to determine how many ADUs your property can accommodate.
Parking Requirements
Conversion and junior ADUs typically 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 Milpitas.
Featured Project
ADU Builder Milpitas FAQs
How long does it take to build a compact second unit in Milpitas?
The typical timeline is 8 to 12 months, covering 1–2 months for design, 2–4 months for permitting, and 4–6 months for construction. Projects on challenging lots or older properties may take longer due to site work or utility upgrades.
What does it cost to add a backyard cottage in Milpitas?
Construction costs usually range from $450 to $500 per square foot. A 750 sq. ft. in-law suite may cost around $340,000, while larger or high-end projects can exceed $475,000. Additional expenses include permit fees, site prep, and utility connections.
Can the new unit use the same utilities as the main house?
Yes. Most small homes can connect to the existing water, sewer, and electrical systems. However, if you're planning to rent it out or want to monitor usage separately, you might consider installing separate meters. Electrical panels may also need upgrading in older homes.
Are there incentives for building energy-efficient spaces?
Yes. Milpitas residents have access to BayREN rebates, along with programs that support solar installation, EV chargers, and energy-efficient appliances. All new homes must comply with California’s Title 24 energy codes, and units under 750 sq. ft. are typically exempt from impact fees.
Why are more homeowners adding secondary suites or guest houses?
These small-scale homes are perfect for extended family, renters, or private workspaces. They offer flexible living solutions while increasing property value—and they can support multi-generational households without sacrificing privacy.
Is there growing interest in granny flats and garage conversions in Milpitas?
Yes. As housing prices rise, more residents are turning to converted garages, detached studios, and guest cottages to create more space or bring in rental income—all while staying on the property they already own.
What types of styles and features are popular?
Homeowners often go for modern, minimalist layouts with open floor plans, energy-efficient systems, and large windows. Detached units with private entries and small outdoor areas are also in demand, especially when used as rentals or independent living quarters.
Where can I get help with zoning and permits?
The City of Milpitas Planning Division provides resources like zoning maps, development checklists, and building guidelines on their website. You can also meet with staff for a pre-application consultation to understand your property’s requirements.
How do compact homes affect Milpitas neighborhoods?
When thoughtfully designed, these small units fit well within residential areas. The city maintains standards for height, setbacks, and architectural compatibility to make sure additions are appropriate for the lot and surrounding homes.
Is parking required for the new space?
In many cases, no additional parking is required, especially if the unit is within ½ mile of public transit or if you’re converting part of the main house or an existing garage. Otherwise, one off-street space may be required.
Service Areas
Want to build your own ADU but don't know how to start?
Consult with Us Now
By requesting a callback using our form.
Get expert advice and professional guidance from our ADU Experts!