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Top Rated Contractor for Custom ADU in Los Gatos, California

Featured Project

Located in Pleasanton, this detached accessory dwelling unit measures up to 440 square feet. It has a kitchen, bathroom, bedroom, living room, walk-in closet, and a utility room. 

With proper design, it’s amazing how we’re able fit all these amenities in this secondary dwelling unit. We have to say that it’s even more fulfilling to have a custom-built ADU with personalized designs and layouts that fit your lifestyle needs. One interesting thing about this ADU is the addition of a patio just outside the ADU since Christina loves to cook and gather with friends.

Watch this video to take a look inside this beautiful custom-built ADU:


Cristina has been living with her mother for a year and a half. After some time, she realized she wanted to have her own space so they talked about building an Accessory Dwelling Unit (ADU).

The thought of building a custom-built ADU in Pleasanton was a win-win solution because she can finally have a space of her own and, in the future, she could rent it out to tenants, giving her additional source of passive income.


What this video as Christina shares with you her experience in building her own detached ADU from start to finish.

About ADU Builders Group

At ADU Builders Group, we are on a mission to revolutionize how homeowners in the Bay Area expand their living spaces. Our core dedication lies in helping these homeowners effortlessly build their Accessory Dwelling Units (ADUs) by streamlining every step of the process. With the rising need for additional living space, our company offers a timely solution that not only increases property value but also supports multi-generational living and generates potential rental income.


Our Expertise

We specialize in creating customized livable spaces tailored to fit the needs of every homeowner. Our product range includes:

Accessory Dwelling Units (ADUs)

Independent living units equipped with their own sleeping, cooking, and bathroom facilities.

Attached ADUs

These units share a wall with the main home, perfect for those looking to maintain close proximity to their additional living space.

Detached ADUs

Stand-alone units that offer privacy from the main home, ideal for renters or as guesthouses.

Junior ADUs (JADUs)

Smaller living units converted from existing spaces within the main home, such as bedrooms or garages, offering a compact but fully functional living solution.


Why Choose Us?

Our commitment to excellence and customer satisfaction is reflected in our unique selling points:


3 Years Service Warranty with Complimentary Annual Inspection

We stand behind the quality of our work with a 3-year service warranty on all our custom-built ADUs, ensuring peace of mind for our clients. To further assure the durability and maintenance of your investment, we provide a complimentary annual inspection, making sure your ADU remains in peak condition. This service warranty is on-top of 10-year standard warranty on structural components.


Streamlined Process

Understanding the complexity involved in building a custom-built ADU, we've refined our processes to offer an effortless experience. From initial design consultation to final walkthrough, our team of experts is with you at every step, ensuring a seamless transition from vision to reality.


Customizable Solutions

Recognizing that every homeowner's needs are unique, we offer fully customizable ADU solutions. Whether you're looking for a cozy JADU for family or a spacious detached ADU for rental income, we adapt our designs to meet your specific requirements.

Our Commitment:


At ADU Builders Group, we’re more than just home builders building custom ADUs. We’re about creating valuable, functional spaces that enhance lifestyles and bring visions to life. With a keen focus on innovation, quality, and customer satisfaction, we are dedicated to transforming the way the Bay Area thinks about home expansion.


Contact us today by filling out the form below to take the first step towards building your own custom-built ADU.

How to Build an ADU in Los Gatos, California

Building a custom-built ADU in Los Gatos, California can be summarized into a seven-step process:

  1. Get Started

  2. Learn The Rules

  3. Set your Budget

  4. Design your ADU

  5. Apply for Permits

  6. Build your ADU

  7. Rent it Out or Move It

How to get started with ADU?

You can start with your ADU by thinking about what you want and asking yourself these questions:

  • Who am I building this for?

  • What are the amenities I need to add into this project to support my family members, my tenant, or my own needs?

  • How can it improve and support my lifestyle?

If you’re looking for an inspiration, you can go check your local neighborhood for anyone who owns a casita, visit online community groups for ADU on Facebook and other social media channels, check these floorplans compiled by Santa Clara County ADU, search for “ADU contractor near me” and check portfolios of local ADU builders in your area, or simply consult with us at ADU Builders Group by filling out the form below.


What are the Standards and Rules for Building an ADU in Los Gatos?

Here’s a compilation of answer to frequently asked questions about the standards and rules for building in ADU in Los Gatos.


What zones are allowed to build an ADU in Los Gatos?

R-1, R-D, R-M, R-1D, RMH, HR, and RC. 


What is the minimum ADU size in Los Gatos?

150 square feet.


What is the maximum ADU Size in Los Gatos?

1,200 square feet.


How many ADUs are allowed in a Single-Family Property in Los Gatos?

A minimum of one ADU and one JADU are permitted per lot, as long as the lot meets size and location requirements.


How many detached ADUs are allowed in a Multi-Family Property in Los Gatos?

Two detached ADUs allowed and up to 25% of non-living space can be converted  to ADUs.


What is the maximum allowable height for detached ADU in Los Gatos?

  • Up to 16 feet tall on any lot, or

  • Up to 18 feet tall, if property is within one-half mile walking distance of a major transit stop or on a high-quality transit corridor, plus two additional feet for a sloped roof.

  • Up to 18 feet tall, if property already has or is proposing multi-family building with multiple stories.

  • Above a garage can be whatever the zoning code allows if the garage complies with setbacks and the main home complies with parking laws.

What is the maximum allowable height for an attached ADU in Los Gatos?

Up to 25 feet tall, or the maximum allowed by your zoning code – whatever is lower.


What are the required setbacks for ADUs in Los Gatos?

  • Front and street-side setbacks must comply with zoning regulations for the primary dwelling.

  • Side and rear setbacks must be 4 ft.

  • Detached ADUs must have a 5 ft separation from any other structure.

  • Setback regulations may default to State Law as required.

Are there any lot or location restrictions for ADUs in Los Gatos?

Yes. See 29.10.320 (b) of the Los Gatos Municipal Code.


What are the parking requirements when building an attached or detached ADU in Los Gatos?

ADU parking requirements default to State Law. Attached and detached ADUs do not require additional parking if they are within 1/2-mile walking distance to transit (including a ferry), in an architecturally or historically significant district, one block from car-share access, located in an area where on-street parking permits are required but not provided to the occupant, or built as a part of new a home.


What are the parking requirements when building a JADU in Los Gatos?

Internal ADUs/JADUs do not require new parking.


Is there any Owner-Occupancy Rule for JADU in Los Gatos?

Yes. Owner must occupy either the JADU or the primary house.


Are there any deed restrictions when building accessory dwelling units in Los Gatos?



What is the regulation for renting accessory dwelling units or JADU in Los Gatos?

Generally, ADUs and JADUs cannot be rented for fewer than 30 days at a time.

What are the fees for ADUs in Los Gatos?

Check the ADU Building Permit Application

You may refer to Local Rules & Contacts - Santa Clara ADU , then select your city to check for the latest rules in your area. Check with your local city as well to assess your property and ascertain its suitability for an ADU. Determine the type of ADU you can build based on your local zoning laws and the physical characteristics of your property.

How much does it cost to build an ADU in Los Gatos?

For custom ADUs, the estimated cost per square foot can range from $450 - $500. You can start planning your budget using this estimate. You may also contact us for a more detailed quotation by filling out the form below. 


You may also be interested to look into financing options.

How to finance an ADU in Los Gatos?

To finance your ADU, you have several options from loans, HELOC, to grants.



Several loan options exist for financing an ADU project. A home equity loan, for instance, allows you to borrow against the equity you've built up in your home. Another alternative is a construction loan, which is a short-term loan that covers the cost of construction. Once the construction is complete, the loan can either be paid off or converted into a standard mortgage.


Home Equity Line of Credit (HELOC)

Similar to a home equity loan, a HELOC also lets you borrow against your home's equity. However, it works more like a credit card, where you have a line of credit you can draw against as needed.



In certain situations, grants may be available for ADU construction. Some local and state programs offer grants, especially targeted at homeowners looking to build ADUs for low-income renters or seniors. It's worth researching local initiatives and programs in your area. The CalHFA 40k ADU Grant is one notable grant to look into.


Do you have financing options?

Yes, we partner with reputable finance companies to help our clients build their ADU as soon as possible.

How to Design your ADU?

You can start by getting some inspiration then hiring a professional architect to lay out your vision for you. It would even be better to look for a reputable local ADU contractor in your area that offers both design and build services.


Discuss your initial design with the local Planning staff. After revisions, finalize your design and have your contractor prepare the plans for permitting.


How to find the right local adu contractor near me in Los Gatos?

You can do a Google Search for the keyword “adu contractor near me” or get referrals from your friends or local community. Then go on checking their credentials, licenses, and insurance. Review their portfolios and ask for references. Get multiple quotes and compare. Prioritize clear communication and trust your instincts.


Do You Need a Permit for an ADU in Los Gatos?

Yes. Start by confirming application requirements with your local staff. Then, submit your application online or in-person and pay any required fees. Staff will review your application within 60 days, and often sooner. Revise your application if needed. Staff will tell you the best way to be in contact, likely via email. Generally, outstanding fees are due before your permit is issued.  


How to Build your ADU in Los Gatos?

The best way to do it is by working with a reputable contractor like ADU Builders Group. We’ll handle everything you need for your ADU from design to moving in. We believe that in every successful project, the key is effective communication. That’s why, we’ll regularly update you with the progress of your project for your peace of mind.


Rent it Out or Move In 

After passing the final inspection, it’s ready for move-in! A bit of landscaping would be advisable if you prefer to beautify and add more personality to your property. Enjoy your new ADU! 



Check out this overview of the entire ADU process prepared by the Santa Clara County ADU.

What is an Accessory Dwelling Unit?

ADUs are self-contained secondary living units that share the same lot as a primary residence. They can be either attached or detached from the primary residence and are often smaller in size. An ADU typically has its own entrance, kitchen, bathroom, and living space. It can come in different forms such as a basement apartment, converted garage or attic space, or a separate building on the property.

ADU is also sometimes referred to as one of the following depending on their uses or for whom it is built:

  • granny flats,

  • in-law suites,

  • backyard cottages,

  • secondary suite,

  • secondary dwelling unit, or

  • casita.

Whatever people choose to call it, the primary purpose of ADUs,both prefab and custom-built, is to provide additional housing options for homeowners. They can be used for various purposes such a

  • accommodating aging parents,

  • independent living space for adult children, or

  • source of rental income.




Rising Demand of ADUs in California

California, known for innovation and opportunity, attracts dreamers and visionaries from all over the world. However, behind its successful appearance, there is a growing housing crisis that has been getting worse for years.


Despite its technological advancements, cultural diversity, and economic prowess, the state faces shortage of affordable housing. Factors contributing to this housing shortage are population growth, limited construction, strict zoning rules, and high real estate prices. This makes it difficult for average earners to find affordable homes. In the face of this crisis, ADUs have emerged as a promising solution.


From 3,163 ADUs built in 2018, this number has risen to 13,439 in 2022, indicating a 325% increase in the number of ADUs built. These data are based on a report from UC Berkeley’s Center for Community Innovation. Since then, the concept of accessory dwelling units (ADUs) has been continuously gaining popularity in the housing market.



What are the Benefits of having an ADU on your Property?

Having an ADU on your property can offer several benefits to you such as providing an opportunity to earn extra income by offering it as a rental property or allowing you to keep your families closer together while still having a sense of privacy and independence. Custom-built ADU offers a convenient housing option for aging parents, adult children, or guests.


Moreover, adding an ADU can potentially increase the overall value of your property.


ADUs can help address housing shortages as well by providing more affordable housing options in high-demand urban areas. They offer a smaller, more affordable alternative to traditional single-family homes. For individuals or families who cannot afford a traditional single-family home, ADUs are considered as a more affordable housing option.


ADUs can serve various purposes, including a rental unit, home office, guesthouse, or even a space for aging in place. The flexibility allows homeowners to adapt the space to their changing needs over time. That’s how you can benefit from building an ADU on your property.


What are Different Types of ADU?

When it comes to accessory dwelling units (ADUs), there are several different types that cater to diverse needs and property structures. Let's discuss the four types of ADUs mentioned in the ADU Handbook published by the California Department of Housing & Community Development.


Attached ADUs

Attached ADUs are an extension or addition to the primary residence. They are physically attached to the main building and might involve converting a garage or adding a new structure onto the existing house. This type of ADU is beneficial for those homeowners who want to maintain a direct connection between the main house and the ADU.


​Detached ADUs

Detached ADUs, on the other hand, are separate structures that are independent of the primary residence. These are often constructed in the backyard and can offer a greater degree of privacy compared to attached ADUs. Detached ADUs are a great option if your lot has ample outdoor space.


Converted Existing Space ADUs

Converted Existing Space ADUs involve transforming an already existing part of the home into a self-contained living space. This could mean converting a basement, attic, or even a section of the house into an ADU. This type of ADU is a cost-effective choice as it utilizes existing structures.


Junior ADUs

Junior ADUs (JADUs) are smaller in size, typically up to 500 square feet, and are located within the walls of the primary dwelling. They include their own separate entrance, as well as an efficiency kitchen. JADUs offer a more compact, yet self-sufficient, living arrangement.


Each type of ADU has its unique set of advantages and considerations. It's essential to assess your specific needs, local regulations, and the available space on your property before deciding on the most suitable type of ADU. Whether it be an attached ADU for easy accessibility, a detached ADU for added privacy, a converted existing space ADU for an economical solution, or a junior ADU for a smaller-scale dwelling option, you can find a variation that fits your needs.

Related Questions

How much does it cost to build an ADU in Bay Area?

The cost per square foot for a custom ADU in Bay Area can range from $475 - $500. The cost of building an ADU in Bay Area can range from $190,000 to $450,000 with dimensions ranging from 400 - 900 sq. ft.


How much does it cost to build a house in Los Gatos California?

The cost to build a house in Los Gatos California can range from $500 - $1000. On average, new houses in Los Gatos cost about $1,700,000.


How much does a prefab ADU cost in San Jose?

The cost of a prefab ADU in San Jose can range between $250,000 and $350,000 or more.


Why is ADU so expensive?

Accessory dwelling units (ADUs) can be expensive because it would require new foundations, walls, plumbing, electric, heating and cooling, and a roof. However, compared to constructing a new house, building an ADU is the more affordable option.

Fun Facts About Los Gatos

There are around 30,222 people living in Los Gatos. Average income is about $202,923.

100% of ADUs built in 2018 and 2019 were intended to be made available to renter. The estimated cost per sqft for custom built ADUs ranges from $475 - $500. The average property value in Los Gatos is $1,791,809.

Nestled in the heart of the picturesque Santa Clara Valley in California, Los Gatos is a charming town known for its small-town feel, natural beauty, and vibrant community. For travel enthusiasts seeking new adventures, Los Gatos offers a tapestry of experiences that weave history, culture, and nature together in an enchanting patchwork. Whether you're strolling through the historic downtown, hiking the trails of the Santa Cruz Mountains, or savoring the local culinary delights, Los Gatos promises a well-rounded escape. Beyond the clichés of Silicon Valley, there's a town brimming with its own unique identity. If you're considering a visit or just daydreaming about your next getaway, here are some fun facts about Los Gatos to whet your travel appetite.

Rich History

Los Gatos boasts a diverse past, from the Ohlone people to Spanish and American colonization, reflected in adobes, Victorian homes, and the Los Gatos History Museum. Forbes Mill, dating to the 1850s, signifies the town's importance during the Gold Rush. The museum offers exhibits and walking tours for history enthusiasts.

Vibrant Culture

Despite its small size, Los Gatos shines culturally. The town features a lively art scene, with galleries exhibiting local and international talents. The Los Gatos Art Museum houses a varied collection focusing on California art. Don't miss the Los Gatos Music & Arts Festival for live performances and arts stalls. This annual event transforms the town into a creative hub, embodying Los Gatos' artistic spirit.

Nature's Playground

Los Gatos is a haven for outdoor enthusiasts, with abundant natural wonders to discover. The town enjoys a mild, Mediterranean-like climate, ideal for year-round adventures. The Los Gatos Creek Trail offers a scenic route for walking, running, or biking through town and beyond. For more challenging hikes, head to the Sierra Azul Open Space Preserve for stunning valley views. Lexington Reservoir is perfect for picnics, fishing, and paddleboarding or kayaking. These natural spots are wildlife havens, emphasizing the region's conservation significance.

Culinary Adventure

Los Gatos features a diverse culinary scene focusing on quality dining experiences. With international cuisines and farm-to-table practices, it's a food lover's paradise. Explore the weekly farmers' market for local produce and artisanal goods. From casual to upscale eateries, each restaurant adds a unique touch to the town's culinary scene. Enjoy dishes like creamy risotto with English peas or savor a dessert paired with wine from Santa Cruz Mountain vineyards.

Hidden Charms

While Los Gatos offers famous landmarks and local luxuries, hidden gems truly enhance the town's charm. Away from main streets, find secret gardens, vibrant street art in alleyways, and speakeasy-style bars for the adventurous. Further out lies the Hakone Estate and Gardens, blending tranquility of Japanese design with botanical vibrancy. These hidden charms define Los Gatos, waiting to be discovered by curious travelers seeking a personal connection.

Los Gatos isn't just charming; it's a destination of allure and discovery. It blends history with modernity, celebrates culture, and offers a nature escape from the digital world. A treasure trove beckoning adventurers, inspiring artists, and welcoming travelers. Beyond the tech veneer, Los Gatos showcases California's diverse experiences. Whether solo, couple, or family, it promises rich adventures and lasting memories.

Consult with Us.

Got inquiries? Wanna start building your own ADU?

Reach us out by submitting the form below.

Service Areas

  • ADU Palo Alto

  • ADU San Jose

  • ADU Santa Clara

  • ADU Saratoga

  • ADU Sunnyvale

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