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Campbell ADU Zoning And Building Standards

Navigating the complex world of Accessory Dwelling Units (ADUs) in Campbell, California can be overwhelming. This comprehensive guide breaks down the zoning and building standards for ADUs in Campbell, empowering homeowners to make informed decisions and create the perfect additional living space on their property.

Our team of experienced professionals is here to guide you through every step of the ADU process in Campbell. From understanding zoning regulations and building standards to designing and constructing your dream ADU, we provide expert advice and support to ensure a smooth and successful project.

Campbell ADU Zoning and Building Standards

Property Requirements

Before embarking on your ADU journey in Campbell, it’s crucial to understand the property requirements. These requirements vary based on the zoning of your lot, whether it’s single-family, duplex, or multi-family. Let’s dive into the specifics of each zoning type and how they impact your ADU plans.

Building Size

The building size of your ADU in Campbell depends on several factors, including the zoning of your lot and whether the ADU is attached or detached. Understanding these size limitations is essential for designing an ADU that meets your needs while adhering to local regulations.

  • Single-Family Zoned:

Single-family zoned lots in Campbell offer the most flexibility when it comes to ADU construction. Homeowners can build either an attached or detached ADU, with generous size allowances. However, there are still specific requirements to keep in mind, such as setbacks and height limitations.

  • Duplex Family Zoned Lots:

Duplex family zoned lots in Campbell allow for the construction of ADUs, but with some additional considerations. Homeowners must ensure that the ADU does not exceed a certain percentage of the primary dwelling’s size and that it adheres to specific setback and parking requirements.

  • Multi-Family Zoned Lots :

Multi-family zoned lots in Campbell present unique opportunities and challenges for ADU construction. While multiple ADUs may be allowed on these properties, there are strict regulations regarding size, placement, and parking. Understanding these requirements is essential for a successful multi-family ADU project.

  • Attached ADUs:

Attached ADUs in multi-family zoned lots must not exceed a certain percentage of the primary dwelling’s size and may require additional fire safety measures.

  • Detached ADUs:

Detached ADUs in multi-family zoned lots have specific size and placement requirements, and may need to provide additional parking spaces.

Owner-occupancy

In Campbell, owner-occupancy requirements for ADUs vary depending on the type of ADU and the zoning of the lot. Some ADUs may require the property owner to live on-site, either in the primary dwelling or the ADU itself, for a specified period.

Number Of Units Allowed

The number of ADUs allowed on a property in Campbell depends on the zoning and lot size. Single-family and duplex lots are typically limited to one ADU, while multi-family lots may be permitted to have multiple ADUs, subject to specific requirements and restrictions.

Campbell Building Height

Building height restrictions for ADUs in Campbell are designed to ensure that these additional living spaces integrate seamlessly with the surrounding neighborhood. The maximum allowed height for an ADU varies based on the zoning of the lot and whether the ADU is attached or detached.

  • Single-family: In single-family zoned lots, the maximum height for an attached ADU is typically the same as the primary dwelling, while detached ADUs may have a slightly lower height limit. These height restrictions help maintain a consistent aesthetic in single-family neighborhoods.
  • Duplex family: Duplex family zoned lots in Campbell may have different height restrictions for ADUs compared to single-family lots. The maximum allowed height for an ADU on a duplex lot may be lower to ensure that the ADU does not dominate the primary dwellings.
  • Multi-family: Multi-family zoned lots in Campbell often have more complex height restrictions for ADUs. The maximum allowed height may depend on factors such as the number of units in the primary building, the placement of the ADU, and the overall lot size.

Campbell Building Size

The maximum allowed size for an ADU in Campbell varies based on the zoning of the lot and the type of ADU being constructed. These size limitations ensure that ADUs remain secondary to the primary dwelling and do not overcrowd the property.

  • Single-Family Freedom: Single-family zoned lots in Campbell offer the most freedom when it comes to ADU size. Homeowners can build larger ADUs, with generous square footage allowances for both attached and detached units. However, the ADU must still be subordinate to the primary dwelling in terms of size.
  • Duplex house: Duplex family zoned lots in Campbell may have more restrictive ADU size limits compared to single-family lots. The maximum allowed size for an ADU on a duplex lot is typically a percentage of the primary dwelling’s size, ensuring that the ADU remains secondary.
  • Multi-Family Mix: Multi-family zoned lots in Campbell have varying ADU size restrictions based on the specific characteristics of the property. The maximum allowed size may depend on factors such as the number of units in the primary building, lot size, and the placement of the ADU.

Fire Safety Regulations

Fire safety is a critical consideration when building an ADU in Campbell. All ADUs must adhere to local and state fire safety regulations, which may include requirements for fire-resistant construction materials, smoke alarms, and emergency escape routes. Working with a knowledgeable professional ensures that your ADU meets these essential safety standards.

Parking

Parking requirements for ADUs in Campbell vary depending on the zoning of the lot and the type of ADU being constructed. Some ADUs may require additional off-street parking spaces, while others may be exempt from parking requirements if they meet specific criteria, such as proximity to public transit.

Utility Connections

When building an ADU in Campbell, it’s essential to consider utility connections. ADUs typically require separate connections for water, sewer, and electricity, which may involve additional costs and permits. Working with a professional can help ensure that your ADU has safe and reliable utility connections.

Setbacks

Setback requirements for ADUs in Campbell dictate the minimum distance between the ADU and property lines, as well as the primary dwelling. These requirements vary based on the zoning of the lot and the type of ADU being constructed, and are designed to ensure adequate space between structures.

Zoning Regulations

Understanding the zoning regulations for your property in Campbell is crucial when planning an ADU. Each zoning type – single-family, duplex family, and multi-family – has its own set of requirements and restrictions. Familiarizing yourself with these regulations can help you design an ADU that complies with local standards.

Campbell ADU Zoning Regulations

Single Family

Single-family zoned lots in Campbell have the most straightforward ADU regulations. Homeowners can typically build one attached or detached ADU, subject to size, height, and setback requirements. However, it’s still essential to review the specific regulations for your property before beginning your ADU project.

Duplex Family

Duplex family zoned lots in Campbell may have more complex ADU regulations compared to single-family lots. These regulations may include restrictions on the size and placement of the ADU, as well as additional parking requirements. Consulting with a professional can help you navigate these regulations and design a compliant ADU.

Multi-Family

Multi-family zoned lots in Campbell have the most intricate ADU regulations. These properties may be allowed to have multiple ADUs, but each unit must adhere to specific size, placement, and parking requirements. Understanding these regulations is essential for designing and building successful ADUs on multi-family properties.

RF Zone Minimum Lot Area In Campbell

In Campbell RF Zone, minimum lot sizes range from spacious single-family homes (RF-20) to sprawling estate properties (RF-40), ensuring ample space for your ADU and lifestyle.

  • RF-20: In the RF-20 zone, the minimum lot size is 20,000 square feet, providing ample space for a comfortable single-family home and an ADU.
  • RF-30: The RF-30 zone requires a minimum lot size of 30,000 square feet, offering even more room for a spacious primary dwelling and a well-appointed ADU.
  • RF-40: With a minimum lot size of 40,000 square feet, the RF-40 zone allows for expansive estate properties that can easily accommodate a primary dwelling and a generous ADU.

Room Specifications

When designing your ADU in Campbell, it’s essential to consider the specific requirements for each room. This table outlines the key specifications for bathrooms, kitchens, sleeping areas, and storage spaces, ensuring that your ADU is both functional and compliant with local regulations.

Campbell ADU Room Specifications

Room TypeSpecifications
Bathroom– Minimum 30 square feet
– Ventilation required
– Water-resistant flooring
– GFCI outlets
– Proper plumbing connections
Kitchen– Minimum 50 square feet
– Sink with hot and cold water
– Cooking appliance
– Refrigerator space
– Counter and storage space
Sleeping Areas– Minimum 70 square feet
– Egress window or door
– Closet space
– Proper ventilation
– Smoke detector
Storage– Adequate storage space
– Easily accessible
– Well-ventilated
– Pest-resistant
– Moisture-resistant materials

Campbell Requirements

Building an ADU in Campbell involves meeting specific requirements based on the type of ADU you plan to construct. Whether you’re considering a detached ADU, an attached ADU, or a Junior ADU (JADU), understanding these requirements is crucial for a successful and compliant project.

Detached ADU Campbell : Detached ADUs in Campbell are standalone structures, separate from the primary dwelling. These ADUs must adhere to specific size, height, and setback requirements, which vary based on the zoning of the lot. Detached ADUs also require separate utility connections and may need additional parking spaces.

Attached ADU Campbell : Attached ADUs in Campbell are connected to the primary dwelling, either through a shared wall or as an addition to the existing structure. These ADUs must comply with size and height restrictions, and may have specific requirements for fire separation and access. Attached ADUs can often share utility connections with the primary dwelling.

JADU Campbell : Junior ADUs (JADUs) in Campbell are small, efficiency units that are created within the existing footprint of the primary dwelling. JADUs have specific size limitations and must include a kitchenette and separate entrance. They may share certain amenities with the primary dwelling, such as a bathroom or utility connections.

Rental Requirements

If you plan to rent out your ADU in Campbell, it’s important to understand the rental requirements. These requirements help ensure that your ADU is a safe and habitable living space for tenants, and that you are following all applicable laws and regulations.

  • Proof of income: Before renting out your ADU, you may need to provide proof of your income to demonstrate your ability to maintain the property and cover any necessary expenses.
  • Credit score: Landlords may check your credit score to assess your financial responsibility and ability to manage rental payments. A good credit score can help you attract responsible tenants.
  • Rental history: Providing a record of your previous rental history, including any experience as a landlord, can help demonstrate your ability to manage a rental property effectively.
  • Application fee: You may choose to charge potential tenants an application fee to cover the costs of background checks and credit reports. However, it’s important to comply with state and local regulations regarding application fees.
  • Security deposit: Collecting a security deposit from tenants can help protect your investment in case of damage or unpaid rent. Be sure to follow state and local laws regarding security deposit amounts and handling.
  • Proof of renter’s insurance: Requiring your tenants to carry renter’s insurance can provide an additional layer of protection for both you and your tenants in case of unexpected events or accidents.
  • Pet policy: Establishing a clear pet policy for your ADU rental can help attract responsible pet owners and minimize potential damage to the property. Be sure to outline any restrictions or additional fees associated with pets.
  • Smoking policy: Implementing a smoking policy for your ADU rental can help maintain the quality of the living space and reduce the risk of damage or odors caused by smoking.

Development Standards For Campbell ADU

This table summarizes the key development standards for different types of ADUs in Campbell. By understanding these standards, you can ensure that your ADU project meets all necessary requirements and complies with local regulations.

ADU TypeDevelopment Standards
Single-family– One ADU allowed
– Maximum size restrictions apply
– Height limits vary by ADU type
– Setback requirements must be met
– Parking requirements may apply
Duplex– One ADU allowed per duplex
– ADU size limited to a percentage of the primary dwelling
– Height restrictions may be lower than single-family
– Setback requirements apply
– Additional parking may be required
Multi-family– Multiple ADUs may be allowed
– Size restrictions based on lot and building characteristics
– Height limits vary by ADU type and placement
– Setback requirements apply
– Parking requirements based on number of units
Junior ADUs (JADUs)– Created within existing primary dwelling
– Maximum size of 500 square feet
– Must include kitchenette and separate entrance
– May share bathroom with primary dwelling
– No additional parking required

Campbell Property Designations For ADU

When planning an ADU in Campbell, it’s crucial to consider any special property designations that may impact your project. These designations, such as flood zones, geohazard zones, and easements, can affect the feasibility and design of your ADU.

  • Flood zones: If your property is located in a designated flood zone, you may need to take additional precautions when designing and constructing your ADU to minimize the risk of flood damage.
  • Geohazard zones: Properties in geohazard zones, such as areas prone to landslides or earthquakes, may require special engineering and design considerations to ensure the safety and stability of your ADU.
  • Easements: Easements on your property, such as utility or access easements, can limit the available space for your ADU and may require additional permits or approvals before construction can begin.

ADU Permit Requirements And Fees

Before beginning construction on your ADU in Campbell, it’s essential to obtain all necessary permits and pay any associated fees. These permits ensure that your ADU meets safety standards and complies with local regulations.

Campbell ADU Permit Requirements and Fees

  • Building Permit: A building permit is required for all ADU projects in Campbell. This permit ensures that your ADU meets local building codes and safety standards. Fees may vary based on the scope of the project.
  • Electrical Permit: If your ADU requires new or upgraded electrical work, you’ll need to obtain an electrical permit. This permit ensures that all electrical installations are safe and up to code.
  • Plumbing Permit: A plumbing permit is necessary for any ADU projects that involve new or modified plumbing systems. This permit verifies that all plumbing work is performed safely and in compliance with local regulations.
  • Other Permits: Depending on the specifics of your ADU project, you may need additional permits, such as a mechanical permit for HVAC work or a grading permit for site preparation.

Design Your Dream ADU Today!

Now that you have a comprehensive understanding of the zoning and building standards for ADUs in Campbell, it’s time to start designing your dream ADU. Work with our team of experts to create a custom ADU that meets your unique needs and complies with all local regulations. Take the first step towards expanding your living space and enhancing your property value today!

FAQ’s

Yes, but specific setbacks and design considerations apply. Contact the Woodside Planning Department for detailed guidance on navigating unique lot shapes.

Some lenders offer ADU loans, but traditional home loans can also be used for ADU construction, especially if they add value to your property.

Yes! The State of California offers various ADU incentive programs, including grants for low-income homeowners and developers. Research state and local programs to see if you qualify for financial assistance.

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