ADU Knowledge
December 3, 2024

Los Gatos ADU Guide: From Planning to Permits

Argi Avetisyan
Argi Avetisyan
Gather ADU expert
Los Gatos ADU Guide: From Planning to Permits
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Accessory Dwelling Units (ADUs) have gained considerable popularity across California, especially in cities like Los Gatos, where rising housing costs and a demand for multi-generational living have made these compact living spaces an attractive option. Building an ADU in Los Gatos is not only a way to maximize your property’s potential but also an opportunity to contribute to the growing movement of sustainable and affordable housing.

This comprehensive guide will walk you through every essential aspect of building an ADU in Los Gatos, from planning and design to navigating the permit process and understanding key considerations. Whether you're building an ADU to provide housing for a family member, rent out as a source of income, or simply want to expand your living space, this article will provide valuable insights to guide you through the process.

1. What Is an ADU?

An Accessory Dwelling Unit (ADU) is a secondary, smaller dwelling located on the same lot as a primary residence. ADUs can take various forms, such as:

  • Detached ADU: A separate, stand-alone unit from the main house.
  • Attached ADU: A unit connected to the primary residence, often as an addition or conversion of part of the existing structure.
  • Conversion ADU: A repurposing of an existing structure, such as a garage or basement, into a livable space.

In Los Gatos, like the rest of California, ADUs are governed by specific state and local regulations to ensure they meet safety, zoning, and building codes. Understanding these rules is crucial to successfully designing and building an ADU.

2. Why Build an ADU in Los Gatos?

Before diving into the technical details of building an ADU, it’s important to understand why Los Gatos homeowners are increasingly choosing to build these units. There are several advantages to adding an ADU to your property:

A. Additional Income

Renting out an ADU can provide a steady stream of income, especially in a sought-after location like Los Gatos. The demand for rental properties is high, and with an ADU, you can leverage your property's potential and earn extra money.

B. Multigenerational Living

An ADU can be a perfect solution for multigenerational households. Whether you're housing aging parents, young adult children, or other family members, an ADU provides a private living space while keeping everyone close by.

C. Increased Property Value

Adding an ADU to your property can significantly increase its value. In many cases, properties with ADUs are more desirable to buyers, particularly those looking for rental opportunities or additional living space.

D. Sustainable Housing Option

As Los Gatos continues to grapple with housing shortages, building an ADU is a sustainable solution that can provide much-needed housing without requiring the construction of new subdivisions or large-scale developments.

3. Los Gatos Zoning and ADU Regulations

Los Gatos ADU

Before embarking on your ADU project, it's essential to understand the zoning regulations specific to Los Gatos. California state laws have streamlined the ADU approval process, making it easier to build these units across the state. However, Los Gatos has its own set of requirements and restrictions that you must follow.

A. General ADU Regulations in Los Gatos

  • Zoning: In Los Gatos, ADUs are typically allowed in residential zones, but you must check your property’s zoning designation to confirm its eligibility. Some properties may be restricted due to their proximity to environmentally sensitive areas, such as hillsides or floodplains.
  • Size Limits: The size of your ADU in Los Gatos depends on the size of your lot and other factors, such as whether it’s detached or attached. Typically, the maximum size for a detached ADU is 1,200 square feet, while attached units are often limited to a smaller area.
  • Setback Requirements: Los Gatos has setback rules that dictate how far the ADU must be from property lines, neighboring structures, and public streets. These setbacks vary based on the unit’s size and type, so it’s crucial to work with a design professional who understands the local codes.
  • Height Restrictions: ADUs in Los Gatos are subject to height limitations, which usually prevent them from being more than 16-18 feet tall, depending on the zoning district.
  • Parking Requirements: While parking requirements for ADUs have been relaxed under California law, Los Gatos may still require additional parking spaces, especially if the unit is being rented out. However, in some cases, you may be able to waive parking requirements if the property is within walking distance of public transit.

B. Special Considerations for ADUs

  • Historic Preservation: If your property is in a historic district, there may be additional regulations you need to follow to ensure your ADU is consistent with the character of the neighborhood.
  • Design Guidelines: Los Gatos has architectural design guidelines to ensure new construction is in harmony with the community's aesthetic. This is particularly important for ADUs that are visible from the street.

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4. The ADU Planning and Design Process

Once you’ve confirmed that your property is eligible for an ADU, the next step is to start planning and designing the unit. This stage involves understanding the physical limitations of your property and working with professionals to bring your vision to life.

A. Defining Your Goals

Before you begin designing your ADU, take some time to clearly define its purpose. Are you building it for rental income, family use, or as a private guest house? Your goals will help determine the ADU’s size, layout, and features.

B. Hiring a Designer or Architect

Hiring a qualified designer or architect who is familiar with Los Gatos ADU regulations is essential. They can help you navigate local codes, create a design that fits within your property’s space constraints, and ensure compliance with all zoning requirements.

C. Design Considerations

When designing your ADU, consider the following factors:

  • Functionality: Make sure the layout of the ADU maximizes the use of space. Since ADUs are typically small, creating an efficient floor plan is critical.
  • Privacy: Ensure that your ADU maintains privacy for both the primary residence and the ADU occupants. This may involve careful placement of windows, entrances, and outdoor spaces.
  • Sustainability: Incorporate energy-efficient features such as solar panels, energy-efficient appliances, and proper insulation to reduce the environmental footprint of the ADU.

D. Pre-Approved ADU Plans

In some cases, Los Gatos may offer pre-approved ADU plans that simplify the design and approval process. These plans have already been reviewed by the city’s planning department, which can speed up the permitting process.

5. The Permit Process for Building an ADU in Los Gatos

Once your ADU design is complete, the next step is to obtain the necessary permits. This can be a complicated process, but knowing the steps involved will help you stay on track and avoid delays.

A. Building Permit Application

To begin the permit process, you’ll need to submit a building permit application to the Los Gatos Planning Department. This application will include your design plans, site plans, and any other required documentation.

B. Review Process

The planning department will review your application to ensure it complies with local zoning codes, building codes, and environmental regulations. They may request revisions or clarifications before granting approval.

C. Approval of Plans

Once your plans are approved, you’ll receive the necessary permits to start construction. Keep in mind that the approval process may take several weeks to several months, depending on the complexity of your project.

D. Inspections

During the construction process, you will need to schedule inspections to ensure that the work meets building codes. Inspections typically cover the foundation, framing, electrical, plumbing, and final inspections.

6. Construction and Building Your ADU

With permits in hand, you can now begin construction on your ADU. This is where your plans come to life, but it's also when you must ensure that everything complies with local regulations.

A. Choosing a Contractor

Hiring a qualified contractor with experience in building ADUs in Los Gatos is key. Your contractor will manage the construction process and ensure that the work meets all regulatory requirements.

B. Timeline for Construction

The timeline for building an ADU can vary based on its size, complexity, and contractor availability. On average, it takes between 6 months to 1 year to complete an ADU, though smaller, simpler units may take less time.

C. Budgeting for Your ADU

Building an ADU can be a costly endeavor, and it’s important to establish a clear budget from the beginning. Factors such as design, materials, labor, permits, and inspections will all contribute to the overall cost.

7. Final Steps: Occupancy and Renting Your ADU

Once construction is complete and all inspections are passed, you’ll be ready to occupy your ADU. If you plan to rent the space, you may need to register it with the city as a rental unit and adhere to Los Gatos rental regulations.

8. Last Words

Building an ADU in Los Gatos can be a rewarding investment in your property and the community. By following this guide, you’ll have a clear understanding of the entire process, from planning and design to permits and construction. With the right preparation, professional help, and knowledge of local regulations, you can create an ADU that enhances your living space and meets your needs. Whether you’re looking for extra income, a space for family, or simply a more efficient living arrangement, Los Gatos offers a supportive environment for building ADUs.

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