San Lorenzo ADU Zoning And Building Standards

San Lorenzo offers a prime opportunity for homeowners to build Accessory Dwelling Units (ADUs) on their property. These additional living spaces provide flexibility, affordability, and the potential for rental income. Understanding the zoning and building standards is crucial for a successful ADU project in San Lorenzo.

DevArt8 Constructionexperienced professionals is well-versed in San Lorenzo’s ADU zoning and building standards. We guide you through the entire process, from initial planning to final construction, ensuring your ADU meets all required regulations and maximizes your property’s potential.

San Lorenzo ADU Zoning and Building Standards

Property Requirements

San Lorenzo has specific property requirements for ADU construction, varying based on lot size, zoning, and existing structures. These requirements ensure that ADUs integrate seamlessly into the neighborhood while maintaining proper safety standards and aesthetic appeal.

Building Size

ADU building size regulations in San Lorenzo are designed to ensure that these additional living spaces are proportionate to the main dwelling and the lot size. The maximum allowed size depends on factors such as the type of ADU (attached or detached) and the zoning of the property.

  • Single-Family Zoned Lots:

Single-family zoned lots in San Lorenzo offer ample opportunities for ADU construction. The allowed building size for ADUs on these lots is generally more generous compared to other zoning types, allowing for comfortable and spacious additional living quarters.

  • Duplex Family Zoned Lots:

Duplex family zoned lots in San Lorenzo have specific requirements for ADU building size. These regulations ensure that the ADU complements the existing duplex structure while maintaining appropriate spatial relationships and preserving the character of the neighborhood.

  • Multi-Family Zoned Lots:

Multi-family zoned lots in San Lorenzo have unique considerations when it comes to ADU building size. The allowed size may be more limited compared to single-family or duplex lots to ensure that the ADU integrates harmoniously with the existing multi-unit development.

  • Attached ADUs:

Attached ADUs in San Lorenzo are typically limited in size to a percentage of the primary dwelling’s living area.

  • Detached ADUs:

Detached ADUs in San Lorenzo have specific size limitations based on the lot size and zoning type.

Owner-occupancy

San Lorenzo requires owner-occupancy for properties with ADUs. This means that the property owner must reside in either the primary dwelling or the ADU. This requirement helps maintain the residential character of the neighborhood and prevents the proliferation of purely rental properties.

Number of Units Allowed

The number of ADUs allowed on a property in San Lorenzo depends on the zoning type and lot size. Single-family lots are typically allowed one ADU, while duplex and multi-family lots may have the potential for multiple ADUs, subject to specific regulations.

Saratoga Building Height

Building height regulations for ADUs in San Lorenzo ensure that these additional living spaces maintain an appropriate scale and do not overshadow neighboring properties. The allowed height varies based on the zoning type and the specific location of the ADU on the lot.

  • Single-family: Single-family zoned lots in San Lorenzo have specific height limitations for ADUs. These regulations strike a balance between providing adequate living space and preserving the residential character of the neighborhood. The maximum allowed height ensures that ADUs do not dominate the primary dwelling or adjacent properties.
  • Duplex family: Duplex family zoned lots in San Lorenzo have height restrictions for ADUs that consider the existing duplex structure. The allowed height ensures that the ADU complements the duplex’s architectural style and scale while maintaining a harmonious streetscape.
  • Multi-family: Multi-family zoned lots in San Lorenzo have ADU height regulations that take into account the overall development’s scale and density. The allowed height for ADUs in these zones is carefully considered to ensure compatibility with the existing multi-unit buildings and to prevent overcrowding.

San Lorenzo Building Size

San Lorenzo has specific building size regulations for ADUs based on the zoning type. These regulations ensure that ADUs are proportionate to the primary dwelling and the lot size, maintaining a balanced and visually appealing neighborhood.

  • Single-Family Freedom: Single-family zoned lots in San Lorenzo offer the most flexibility when it comes to ADU building size. The allowed size is generally more generous compared to other zoning types, providing ample opportunities for comfortable and spacious additional living quarters.
  • Duplex house: Duplex house lots in San Lorenzo have ADU building size regulations that consider the existing duplex structure. The allowed size ensures that the ADU complements the duplex’s scale and maintains appropriate spatial relationships between the buildings.
  • Multi-Family Mix: Multi-family zoned lots in San Lorenzo have ADU building size regulations that take into account the overall development’s density and character. The allowed size for ADUs in these zones is carefully balanced to ensure compatibility with the existing multi-unit buildings and prevent overcrowding.

Fire Safety Regulations

Fire safety is a top priority in San Lorenzo’s ADU regulations. All ADUs must comply with strict fire safety standards, including proper exit routes, smoke detectors, and fire-resistant materials. These measures ensure the safety of occupants and minimize the risk of fire spread.

Parking

San Lorenzo has parking requirements for ADUs to ensure that the additional living spaces do not strain the neighborhood’s parking capacity. The specific parking requirements depend on factors such as the ADU’s size, location, and proximity to public transit.

Utility Connections

ADUs in San Lorenzo must have proper utility connections, including water, sewer, electricity, and gas (if applicable). The property owner is responsible for ensuring that the ADU has access to these essential services, either through existing connections or by establishing new ones.

Setbacks

Setback requirements for ADUs in San Lorenzo ensure that these additional living spaces maintain appropriate distances from property lines and neighboring structures. The specific setback regulations vary based on the zoning type and the ADU’s location on the lot.

Zoning Regulations

San Lorenzo has specific zoning regulations for ADUs based on the property’s zoning type. These regulations govern various aspects of ADU construction, including allowed uses, size limitations, and development standards.

San Lorenzo ADU Zoning Regulations

Single Family

Single-family zoned lots in San Lorenzo have ADU zoning regulations that prioritize maintaining the residential character of the neighborhood. These regulations typically allow for one ADU per lot, with specific size limitations and development standards to ensure compatibility with the primary dwelling.

Duplex Family

Duplex family zoned lots in San Lorenzo have ADU zoning regulations that consider the existing duplex structure. These regulations may allow for the construction of ADUs within the duplex itself or as a detached unit, subject to specific size and development standards.

Multi-Family

Multi-family zoned lots in San Lorenzo have ADU zoning regulations that take into account the overall development’s density and character. These regulations may allow for the construction of multiple ADUs within the multi-unit development, subject to specific size limitations and development standards to prevent overcrowding.

RF Zone Minimum Lot Area In San Lorenzo

  • RF-20: RF-20 zoned lots in San Lorenzo require a minimum lot area of 20,000 square feet.
  • RF-30: RF-30 zoned lots in San Lorenzo require a minimum lot area of 30,000 square feet.
  • RF-40: RF-40 zoned lots in San Lorenzo require a minimum lot area of 40,000 square feet.

Room Specifications

When designing your ADU in San Lorenzo, it’s essential to consider the specific requirements for each room type. These specifications ensure that the ADU provides a comfortable and functional living space for its occupants.

San Lorenzo ADU Room Specifications

Room TypeSpecifications
Bathroom– Min. size: 50 sq. ft.
– Ventilation required
– Water-resistant floor
– Proper plumbing
– Accessible features
Kitchen– Min. size: 70 sq. ft.
– Proper ventilation
– Adequate counter space
– Safe appliances
– Electrical & plumbing
Sleeping Areas– Min. size: 70 sq. ft.
– Egress window
– Closet space
– Proper ventilation
– Fire safety compliant
Storage– Min. size: 20 sq. ft.
– Proper ventilation
– Secure & accessible
– Fire safety compliant
– Integrated design

San Lorenzo Requirements

San Lorenzo has specific requirements for different types of ADUs, ensuring that these additional living spaces are safe, functional, and compatible with the surrounding neighborhood.

Detached ADU San Lorenzo : Detached ADUs in San Lorenzo must comply with specific setback, height, and size requirements. They must also adhere to fire safety regulations and have proper utility connections. Detached ADUs offer the most flexibility in terms of design and layout.

Attached ADU San Lorenzo : Attached ADUs in San Lorenzo are subject to specific size and integration requirements to ensure compatibility with the primary dwelling. They must have proper fire separation and access to utilities. Attached ADUs are an excellent option for homeowners seeking a more seamless integration with their existing home.

JADU San Lorenzo: Junior Accessory Dwelling Units (JADUs) in San Lorenzo are a unique type of ADU created within the primary dwelling. They have specific size limitations and must include an efficiency kitchen. JADUs offer an affordable and space-efficient option for homeowners looking to add an additional living space.

Rental Requirements

If you plan to rent out your ADU in San Lorenzo, it’s essential to understand the rental requirements and potential tenants’ expectations. These requirements help ensure a smooth and legally compliant rental process.

  • Proof of income: Potential tenants should provide proof of income to demonstrate their ability to pay rent consistently.
  • Credit score: Property owners may require a minimum credit score to assess a potential tenant’s financial responsibility.
  • Rental history: Reviewing a potential tenant’s rental history helps determine their reliability and adherence to lease agreements.
  • Application fee: Property owners may charge an application fee to cover the costs of background and credit checks.
  • Security deposit: Tenants are typically required to pay a security deposit to cover potential damages or unpaid rent.
  • Proof of renter’s insurance: Property owners may require tenants to carry renter’s insurance to protect their personal belongings and limit liability.
  • Pet policy: Establishing a clear pet policy, including any breed or size restrictions and additional fees, is essential.
  • Smoking policy: Property owners should specify their smoking policy, detailing whether smoking is allowed on the premises.

Development Standards For San Lorenzo ADU

San Lorenzo has specific development standards for different types of ADUs to ensure that these additional living spaces are safe, functional, and compatible with the surrounding neighborhood.

ADU TypesDevelopment Standards Specifications
Single-family– Max. size: 1,200 sq. ft.
– 4 ft. side & rear setbacks
– 16 ft. height limit
– 1 parking space
– Match primary dwelling
Duplex– Max. size: 1,200 sq. ft.
– 4 ft. side & rear setbacks
– 16 ft. height limit
– 1 parking space
– Integrate with duplex
Multi-family– Max. size: 1,200 sq. ft.
– 4 ft. side & rear setbacks
– 16 ft. height limit
– 1 parking space
– Match complex style
Junior ADUs (JADUs)– Max. size: 500 sq. ft.
– Within primary dwelling
– Efficiency kitchen
– Separate entrance
– Meet fire safety regs.

San Lorenzo Property Designations For ADU

When planning your ADU in San Lorenzo, it’s crucial to consider any special property designations that may impact the construction process. These designations can influence the feasibility and requirements for your ADU project.

  • Flood zones: Properties located in designated flood zones may have additional requirements for ADU construction to mitigate potential flood risks.
  • Geohazard zones: Properties in geohazard zones, such as areas prone to landslides or earthquakes, may require special engineering and design considerations for ADU construction.
  • Easements: Properties with existing easements, such as utility or access easements, may have restrictions on where an ADU can be located.

ADU Permit Requirements And Fees

Constructing an ADU in San Lorenzo requires obtaining the necessary permits and paying associated fees. These requirements ensure that your ADU project adheres to all applicable zoning and building standards.

San Lorenzo ADU Permit Requirements and Fees

  • Building Permit: A building permit is required for all ADU construction in San Lorenzo, ensuring compliance with building codes and safety standards.
  • Electrical Permit: If you want to do any electrical work on your ADU, like adding outlets, wires, or lights, you need an electrical work permit.
  • Plumbing Permit: A plumbing permit is required for any plumbing work related to your ADU, ensuring proper installation and connection to the main water and sewer lines.
  • Other Permits: Depending on the specifics of your ADU project, additional permits may be required, such as mechanical or fire sprinkler permits.

Design Your Dream ADU Today!

Now that you have a comprehensive understanding of San Lorenzo’s ADU zoning and building standards, it’s time to start designing your dream ADU. Our team of experienced professionals is here to guide you through every step of the process, from initial concept to final construction. Contact us today to schedule a consultation and bring your ADU vision to life!

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.

Related Articles to San Lorenzo