Navigating Solana Beach ADU Regulations: Essential Information for Homeowners

share Share

5 min read

Homeowners aiming to start an ADU project must get familiar with Solana Beach’s ADU regulations.

Understand ADU Construction in Solana Beach

Understanding local ADU regulations in Solana Beach is essential for property owners contemplating an ADU project. This knowledge ensures that your addition aligns with legal standards, maximizes property usage, and enhances value efficiently. Solana Beach, with its unique coastal charm and stringent zoning laws, requires careful navigation through its ADU regulations to achieve successful and compliant development.
Jump to Solana Beach ADU Regulations Comparison Chart

Essential ADU Rules for Solana Beach

What you can build

  • Maximum Sizes

    Detached/attached ADUs: 850 sq ft (studio/1-bed), 1,000 sq ft (2+ bed); no 50%-house or 1,200 sq ft option.
  • Setbacks

    ADUs: 4 ft from rear/side property lines; front setback per zoning.
  • Two-Story

    Detached: 16 ft standard, 18 ft near transit/multifamily, 20 ft matching roof. Attached: up to 25 ft or house height; two stories allowed.
  • Building Separation

    Detached ADU: 6 ft minimum eave-to-eave from primary home; 10 ft if entrance faces another structure’s wall.

Permitting timeline

  • Permitting Timeframe

    Plan review and Coastal Commission: 4–6 months; city approval within 60 days per state law.
  • Coastal

    All ADUs require Coastal Development Permit due to citywide Coastal Zone.

How Many ADUs are Allowed in Solana Beach?

In Solana Beach, California, the number of Accessory Dwelling Units (ADUs) permitted depends on property type and existing structures, as clarified by SB 1211 and the 2025 HCD guidelines. On single-family residential lots, homeowners may construct one detached ADU, create one Junior ADU (JADU) up to 500 square feet by converting existing space within the primary residence (with an owner occupancy requirement), and convert existing space into one additional internal ADU. On multifamily properties, owners can convert existing non-livable areas into ADUs—up to 25% of the existing units—and build up to eight detached ADUs, provided this number does not exceed the total number of existing primary units. For proposed (not yet built) multifamily dwellings, the limit remains at two detached ADUs. Always confirm specific project eligibility with Solana Beach’s Community Development Department.

Yes, Solana Beach sets specific limits on the number of Accessory Dwelling Units (ADUs) allowed on multifamily properties, aligned with the regulations of Senate Bill 1211, effective January 1, 2025. Property owners may convert existing non-livable areas, such as garages or storage rooms, into ADUs, with a maximum of 25% of the number of existing units (at least one conversion is always permitted). Additionally, owners can construct up to eight detached ADUs, provided this does not exceed the total number of existing primary dwelling units. For proposed (not yet built) multifamily properties, the limit remains two detached ADUs per lot. Property owners should verify specific eligibility requirements with the Solana Beach Community Development Department.

ADU Size, Height, and Design Constraints in Solana Beach

In Solana Beach, California, the maximum size allowed for an Accessory Dwelling Unit (ADU) depends on the number of bedrooms it contains. A studio or one-bedroom ADU can be up to 850 square feet, while ADUs with two or more bedrooms can be up to 1,000 square feet. Additionally, ADUs measuring up to 800 square feet are exempt from lot coverage requirements, offering greater flexibility in their placement. These standards support the creation of additional housing while preserving neighborhood character.

In Solana Beach, California, the maximum size for a detached Accessory Dwelling Unit (ADU) depends on its bedroom count: studio or one-bedroom detached ADUs may be up to 850 square feet, while those with two or more bedrooms can reach up to 1,000 square feet. Additionally, detached ADUs up to 800 square feet are exempt from lot coverage limits, providing greater placement flexibility. These guidelines balance the goal of increasing housing availability with maintaining neighborhood character.

In Solana Beach, California, the size limit for an attached Accessory Dwelling Unit (ADU) is 850 square feet for a studio or one-bedroom unit and up to 1,000 square feet for units with two or more bedrooms. These limits apply regardless of the primary dwelling’s size, and there is no additional restriction based on a percentage of the main home’s area or a 1,200-square-foot maximum. Always verify project specifics with the Solana Beach Community Development Department.

In Solana Beach, California, height restrictions for Accessory Dwelling Units (ADUs) depend on the type of unit and property location. Detached ADUs have a standard maximum height of 16 feet, though this increases to 18 feet if located within half a mile of a major transit stop or on multifamily properties. An additional 2 feet (up to 20 feet total) is permitted if the roof pitch matches the primary dwelling, potentially allowing two-story construction in these cases. The city’s regulations do not explicitly specify a separate height limit for attached ADUs. These height restrictions help ensure compatibility with neighborhood character while providing homeowners flexibility.

In Solana Beach, California, constructing a two-story Accessory Dwelling Unit (ADU) depends on local height restrictions and proximity to transit areas. Typically, detached ADUs are limited to 16 feet in height, making them single-story structures. However, detached ADUs within half a mile of major transit stops or high-quality transit corridors can reach 18 feet, with an additional two feet allowed if the roof pitch matches the primary dwelling, thus enabling two-story designs up to 20 feet tall. Attached ADUs can have a maximum height of 25 feet or match the primary dwelling’s height, whichever is lower, permitting two-story construction if compliant. Consulting Solana Beach’s Community Development Department is recommended for site-specific guidance.

In Solana Beach, California, the city’s regulations do not explicitly address roof decks for Accessory Dwelling Units (ADUs), whether attached or detached. Since official sources do not clearly define roof deck allowances or restrictions, homeowners considering a roof deck on their ADU should consult directly with the Solana Beach Community Development Department or review official city planning documents for specific guidance and compliance verification.

In Solana Beach, California, Accessory Dwelling Units (ADUs) must meet specific exterior design criteria to maintain visual harmony with the primary residence and surrounding neighborhood. ADUs must match the architectural style, materials, and colors of the main house, including elements such as roofing, walls, trim, and windows. The primary entrance of an ADU should not be visible from the street adjacent to the front yard setback. Parking located in visible setback areas must be screened by vegetation with a mature height of no more than 42 inches. Additionally, detached ADUs must maintain at least a six-foot separation (measured eave to eave) from the primary residence, increasing to ten feet if the ADU entrance faces another structure’s wall. These guidelines ensure ADUs blend seamlessly into existing neighborhood aesthetics.

In Solana Beach, California, there is no explicit limit on the number of bedrooms allowed in an Accessory Dwelling Unit (ADU); however, bedroom count is indirectly restricted by overall unit size regulations. ADUs with one bedroom or studios cannot exceed 850 square feet, while units with two or more bedrooms are capped at 1,000 square feet. These size constraints inherently limit the practical number of bedrooms, as exceeding two bedrooms within 1,000 square feet can be challenging when accounting for necessary living spaces, kitchens, and bathrooms. Property owners should design their ADUs within these size limitations to ensure compliance with local regulations.

ADU Interior Requirements and Amenities in Solana Beach

In Solana Beach, California, there isn’t a specific limit on the number of bedrooms allowed in Accessory Dwelling Units (ADUs); instead, bedroom count is effectively determined by size restrictions. Studio and one-bedroom ADUs are capped at 850 square feet, while units with two or more bedrooms may be up to 1,000 square feet. These size constraints inherently limit the practical number of bedrooms an ADU can accommodate, given the need to also include essential living spaces such as kitchens and bathrooms. Thus, although no explicit bedroom limit exists, the size constraints indirectly control the number of bedrooms feasible in an ADU.

In Solana Beach, California, building an Accessory Dwelling Unit (ADU) without a kitchen is not permitted. The city requires ADUs to function as independent living units, which must include permanent cooking facilities, in addition to provisions for living, sleeping, eating, and sanitation. The kitchen in an ADU must have a minimum of 10 feet of counter and cabinet space, a sink with a garbage disposal, a refrigerator of at least 12 cubic feet, and at least two hard-wired cooking appliances. Junior Accessory Dwelling Units (JADUs), which are limited to 500 square feet and located within existing structures, must also include an efficiency kitchen. These standards ensure that all ADUs in Solana Beach provide adequate kitchen amenities consistent with local regulations.

In Solana Beach, California, Accessory Dwelling Units (ADUs) must include bathroom facilities to qualify as independent living spaces. Although the city does not outline detailed bathroom specifications, ADUs must comply with the California Building Code, which generally requires a toilet connected to sewage, a sink with hot and cold running water, and a shower or bathtub with proper drainage. These standards ensure adequate sanitation and compliance with health and safety regulations. For detailed guidance, property owners should consult the Solana Beach Community Development Department or the California Building Code directly.

In Solana Beach, California, Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs) differ primarily in size, location, and regulatory requirements. ADUs are independent living units—either detached or attached—that include full kitchen and bathroom facilities, allowing up to 850 square feet for studios or one-bedroom units and up to 1,000 square feet for units with two or more bedrooms. In contrast, JADUs must be created within the existing walls of a single-family home and are limited to 500 square feet, typically with smaller efficiency kitchens, and may share bathroom facilities with the primary residence. Unlike ADUs, JADUs require owner occupancy of the primary dwelling, do not necessitate additional parking, and generally utilize existing utility connections without extra fees. These distinctions help ensure that ADUs and JADUs integrate appropriately within Solana Beach neighborhoods, balancing additional housing options with community character.

Setback and Placement Regulations in Solana Beach

In Solana Beach, California, Accessory Dwelling Units (ADUs) must comply with specific setback requirements to ensure appropriate spacing and neighborhood compatibility. ADUs must maintain at least a 4-foot setback from both side and rear property lines. Front setbacks must align with the existing zoning standards for the property. Standard height restrictions related to setbacks limit detached ADUs to 16 feet, though units within half a mile of major transit stops or high-quality transit corridors may reach up to 18 feet, or 20 feet if the roof pitch matches the primary dwelling. Additionally, ADUs must have a minimum separation of 6 feet from the primary residence, increasing to 10 feet if the ADU entrance faces another structure’s wall. These rules ensure adequate spacing, privacy, and compatibility with neighborhood aesthetics.

In Solana Beach, California, property setback requirements depend on zoning, location, and type of structure. Generally, front setbacks range from 25 to 35 feet, though they may be reduced for shallow lots. Interior side setbacks typically vary between 5 and 15 feet, while corner lots require a 10-foot street-side setback. Rear setbacks are usually between 15 and 35 feet, with allowances down to 15 feet for shallow properties. Accessory Dwelling Units (ADUs) must maintain at least a 4-foot setback from side and rear property lines and comply with standard front setbacks. Additionally, structures near coastal bluffs require at least a 40-foot setback from the bluff edge, which decreases to 15 feet for inland bluffs. For exact guidelines, property owners should consult the Solana Beach Community Development Department.

In Solana Beach, California, detached Accessory Dwelling Units (ADUs) must maintain a minimum separation of six feet from the primary residence, measured from eave to eave. However, if the entrance of the ADU directly faces another structure on the same property, the required separation increases to ten feet. These spacing regulations ensure privacy, safety, and compatibility with neighborhood character. For detailed compliance information, it’s recommended to consult the Solana Beach Community Development Department.

In Solana Beach, California, a detached Accessory Dwelling Unit (ADU) must maintain a minimum separation of six feet from the primary residence, measured eave to eave. However, if the ADU’s entrance directly faces the wall of another structure, the required separation increases to ten feet. These regulations are intended to provide sufficient space for safety, privacy, and property maintenance.

In Solana Beach, California, constructing an Accessory Dwelling Unit (ADU) in the front yard is allowed, provided specific regulations are met. ADUs must comply with the property’s front-yard setback requirements based on its zoning district, ensuring proper neighborhood spacing. Additionally, the ADU’s primary entrance must not be visible from the street adjacent to the front-yard setback. The exterior design, including materials, colors, roofing, and windows, must align with or complement the primary residence to maintain architectural consistency. For precise details tailored to specific properties, homeowners should consult the Solana Beach Community Development Department.

ADU Permit and Legal Requirements in Solana Beach

In Solana Beach, California, building an Accessory Dwelling Unit (ADU) requires obtaining the necessary permits, including building, electrical, and plumbing permits, to ensure compliance with local codes. All ADU plans must first undergo an initial planning review by the city, followed by departmental approval. For properties located within the Coastal Zone, an additional Coastal Development Permit from the Coastal Commission is required. Solana Beach allows digital submission of ADU plans. Additionally, construction of ADUs is not permitted on sites requiring more than 50 cubic yards of grading. Homeowners should contact the Solana Beach Community Development Department for detailed guidance and current requirements.

Yes, the City of Solana Beach accepts digital submissions for Accessory Dwelling Unit (ADU) plans. Applicants must electronically submit a completed Building Permit Application along with the relevant project plans via email to [email protected]. This submission initiates the city’s review process involving Planning, Building, Engineering, and Fire departments. For specific submission guidelines and requirements, it is advisable to refer directly to the City of Solana Beach’s official planning resources or contact their Planning Division for assistance.

In Solana Beach, a soils report for constructing an Accessory Dwelling Unit (ADU) is not always required but may become necessary depending on specific site conditions. If geotechnical concerns such as steep slopes, unstable soils, or other potential hazards are identified during the city’s planning and engineering review, a soils report prepared by a registered civil engineer may be mandated to ensure structural safety and integrity. It is recommended that property owners consult with the Solana Beach Community Development Department early in the planning process to determine whether this requirement applies to their specific project.

Yes, constructing an Accessory Dwelling Unit (ADU) in Solana Beach requires obtaining a Coastal Development Permit (CDP), since the entire city lies within the California Coastal Zone. After initial planning approval from the City of Solana Beach, property owners must apply for and receive a CDP from the California Coastal Commission (CCC) before the city can issue the final building permit. This process ensures that ADUs comply with coastal regulations regarding environmental impact, public access, and visual compatibility. Because obtaining a CDP may extend project timelines, homeowners are advised to engage with both the City of Solana Beach and the CCC early in their planning to fully understand permitting requirements and timeframes.

In Solana Beach, California, a Building Verification Survey is not universally required for Accessory Dwelling Unit (ADU) projects. However, specific site conditions may trigger requirements such as a topographic plan, drainage study, or soils report prepared by registered professionals. A topographic plan is mandatory when the ADU extends beyond the existing footprint, detailing proposed grades and drainage. A drainage study might be necessary to evaluate stormwater impacts, and a soils report may be requested to assess soil stability. To determine exactly which studies or surveys apply to a particular project, it’s advisable to consult directly with the Solana Beach Community Development Department early in the planning process.

In Solana Beach, California, specific stormwater mitigation measures are generally not required when constructing an Accessory Dwelling Unit (ADU). While the city does not impose comprehensive stormwater management processes specifically for ADUs, property owners must still comply with standard building codes and practices that ensure proper site drainage and runoff management. For any site-specific considerations or unusual circumstances, homeowners should consult directly with the Solana Beach Community Development Department.

In Solana Beach, California, the plan review process for Accessory Dwelling Units (ADUs) involves submitting an electronic application along with detailed project plans to the city’s Planning Department. Once accepted, the project enters a departmental review period—typically lasting about 30 days—where Planning, Building, Engineering, and Fire Departments evaluate compliance with local regulations. Due to Solana Beach’s location within the Coastal Zone, projects also require approval from the California Coastal Commission before the city can issue the final building permit. Homeowners are encouraged to consult with the Planning Department early to confirm specific requirements and streamline the approval process.

In Solana Beach, California, Accessory Dwelling Units (ADUs) generally require separate utility connections, including dedicated electrical metering mandated by San Diego Gas & Electric (SDG&E). These separate connections may be subject to capacity charges or connection fees based on the ADU’s size and utility load. Exceptions include Junior ADUs (JADUs) and certain ADUs within existing structures, which typically do not need separate utility connections. Water and sewer connections may sometimes be addressed with sub-metering, allowing the ADU to share utilities with the primary dwelling while separately tracking usage. It’s recommended to consult with the Solana Beach Community Development Department and utility providers early in the planning process for project-specific guidance and compliance.

In Solana Beach, California, separating utility services between a primary residence and an Accessory Dwelling Unit (ADU) generally requires dedicated connections and metering to accurately track utility usage. Specifically, San Diego Gas & Electric (SDG&E) mandates separate electrical panels and meters for all new ADUs. Water and sewer connections typically must also be separate, though sub-metering is sometimes permitted to avoid additional connection fees, especially for ADUs within existing structures or Junior ADUs (JADUs). A separate gas meter may also be required, depending on the ADU’s design. It’s recommended that homeowners consult the Solana Beach Community Development Department and coordinate directly with utility providers early in the planning phase to clarify specific project requirements and costs.

In Solana Beach and throughout California, state law—specifically Assembly Bill 670 (AB 670)—limits Homeowners Associations’ (HOAs) ability to prohibit Accessory Dwelling Units (ADUs). HOAs cannot outright prevent homeowners from constructing ADUs on single-family lots; however, they can enforce reasonable design and aesthetic standards to maintain community harmony. These standards typically cover elements such as exterior appearance, landscaping, and architecture, provided they do not effectively block the ADU’s construction. Homeowners should review their HOA guidelines, coordinate directly with their HOA, and consult the Solana Beach Community Development Department to ensure compliance with both local and community-specific regulations.

Yes, in Solana Beach, California, Accessory Dwelling Units (ADUs) must have their own separate address. The city’s Planning Department assigns a tentative address during the initial review process, which must be clearly indicated on the submitted plans. Having a distinct address for an ADU ensures accurate utility billing, mail delivery, and aids emergency services. Property owners planning an ADU should coordinate early with the Planning Department to secure the required address assignment.

In Solana Beach, California, constructing an Accessory Dwelling Unit (ADU) on an empty lot without a primary residence is not permitted. According to local regulations, an ADU must be situated on the same property as an existing or proposed primary dwelling, either single-family or multifamily. Therefore, a primary residence must first be present or planned before adding an ADU. Property owners should consult the Solana Beach Community Development Department to determine allowable development options for their specific property.

ADUs in Multifamily Properties in Solana Beach

In Solana Beach, California, constructing an Accessory Dwelling Unit (ADU) on a vacant lot is not permitted, as ADUs must be located on a lot that already has an existing or proposed single-family or multifamily dwelling. The city’s municipal code specifies that ADUs are intended to serve as secondary units to primary residences, and therefore, the presence or planned construction of a primary residence is required before adding an ADU. Property owners should consult directly with the Solana Beach Community Development Department for specific guidance and development options for their property.

In Solana Beach, California, stacking detached Accessory Dwelling Units (ADUs) vertically is generally not allowed due to height restrictions. Detached ADUs are limited to a maximum height of 16 feet, making multi-story, stacked detached ADUs impractical under current regulations. However, attached ADUs can be constructed up to two stories, subject to a height limit of 25 feet or the height of the primary dwelling, whichever is lower. Property owners should consult with the Solana Beach Community Development Department to explore allowable design alternatives and ensure compliance with local guidelines.

In Solana Beach, California, constructing an attached Accessory Dwelling Unit (ADU) to your primary residence is permitted. Attached ADUs can be up to 850 square feet for studio or one-bedroom units and up to 1,000 square feet for units with two or more bedrooms. There are no additional restrictions based on a percentage of the primary dwelling’s floor area or an absolute maximum square footage beyond these limits. Additionally, the attached ADU must comply with required setbacks, exterior design standards, and city height regulations. For precise project-specific requirements, consult with the Solana Beach Community Development Department.

In Solana Beach, the city’s Accessory Dwelling Unit (ADU) regulations do not explicitly address the attachment of two ADUs to each other. Single-family properties are limited to one detached ADU and one Junior ADU, while multifamily properties can have up to two detached ADUs per lot. Although the ordinance specifies the number and type of permitted ADUs, it does not explicitly prohibit connecting two detached ADUs. However, all ADU developments must comply with local setback, design, and building code requirements. Property owners considering attaching two ADUs should consult directly with the Solana Beach Community Development Department to clarify compliance and ensure alignment with zoning regulations.

In Solana Beach, California, property owners are permitted to have both an Accessory Dwelling Unit (ADU) and a Junior Accessory Dwelling Unit (JADU) on the same single-family property, subject to certain conditions. A JADU must be constructed within the existing or proposed single-family residence or accessory structure and is limited to 500 square feet, featuring at least an efficiency kitchen and potentially shared sanitation facilities. An ADU can be either attached or detached, with size limits ranging from 850 square feet for studio or one-bedroom units up to 1,000 square feet for units with two or more bedrooms. However, the ADU and JADU must remain distinct—ADUs cannot be physically attached to a JADU, although they can coexist on the same lot. Additionally, if a property includes a JADU, the owner must occupy either the main residence or the JADU.

Parking Requirements for ADUs in Solana Beach

In Solana Beach, California, Accessory Dwelling Units (ADUs) typically require one off-street parking space; however, certain conditions exempt this requirement. No additional parking is necessary if the ADU is within a half-mile walking distance of public transit, located in a historic district, part of an existing structure, near a car-share location, or in areas where street-parking permits aren’t available to ADU occupants. Required parking spaces can be provided within setback areas, including tandem parking in driveways. Property owners should confirm their project’s specific parking requirements or exemptions by consulting the Solana Beach Community Development Department.

In Solana Beach, California, Accessory Dwelling Units (ADUs) generally require one off-street parking space, which can be placed in existing driveways or within property setback areas as tandem parking. However, parking requirements are waived if the ADU is located within a half-mile of public transit, involves converting existing structures, is in a historic district, lies in areas where street parking permits are unavailable to ADU residents, or is within one block of a car-share location. Additionally, the city does not require replacement parking if existing garages or covered spaces are converted into an ADU. Homeowners should consult the Solana Beach Community Development Department for specific compliance details.

ADU Fees and Construction Costs in Solana Beach

In Solana Beach, California, constructing an Accessory Dwelling Unit (ADU) involves several types of fees, including impact fees such as the Transportation Impact Fee ($1,894), Fire Mitigation Impact Fee ($1,894), Park Development Impact Fee ($7,445), and Public Use Facilities Impact Fee ($689). Additionally, applicants must pay plan-check and building permit fees, typically estimated at $8 to $12 per square foot, depending on the project’s valuation. Utility connection fees may also apply if new utility connections are necessary. To obtain accurate fee estimates and account for potential site-specific costs, homeowners should consult directly with the Solana Beach Community Development Department.

In Solana Beach, California, the cost of constructing an Accessory Dwelling Unit (ADU) typically ranges from approximately $220 to $600 per square foot, varying based on factors such as unit size, design complexity, materials, and site conditions. Smaller ADUs (around 500 square feet) generally have higher per-square-foot costs, often between $375 to $600 or more, due to fixed costs like kitchens and bathrooms. Larger units (1,000 to 1,200 square feet) usually benefit from economies of scale, resulting in lower per-square-foot costs, typically ranging from $300 to $375. To obtain accurate cost estimates tailored to specific projects, homeowners should consult experienced local builders and plan comprehensively to account for all factors affecting their budget.

Renting, Leasing, and Selling ADUs in Solana Beach

In Solana Beach, California, renting out an Accessory Dwelling Unit (ADU) is allowed, provided that rentals adhere to specific city guidelines. ADUs must be rented for a minimum term of 30 days, prohibiting short-term or vacation rentals. Unlike Junior ADUs, there is no owner occupancy requirement for properties with ADUs; thus, property owners may rent both the main residence and the ADU simultaneously. Property owners should remain aware of these regulations and consult with the Solana Beach Community Development Department for guidance to ensure compliance with all local rental standards.

In Solana Beach, California, Accessory Dwelling Units (ADUs) can be rented out, but they cannot be used as short-term vacation rentals. The city mandates a minimum rental period of 30 consecutive days for ADUs, explicitly prohibiting shorter-term rentals through platforms like Airbnb. Property owners must adhere to this minimum rental duration to comply with local regulations and avoid penalties. It’s recommended that homeowners consult the Solana Beach Community Development Department for specific details and requirements to ensure compliance.

In Solana Beach, California, Accessory Dwelling Units (ADUs) cannot currently be sold separately from the primary residence. Although California Assembly Bill 1033, enacted in 2023, allows cities the option to permit separate sales of ADUs, Solana Beach has not adopted such an ordinance as of March 2025. Therefore, ADUs in the city must remain on the same parcel and ownership as the primary residence. Homeowners interested in this topic should consult the Solana Beach Community Development Department to stay informed of potential future changes to local regulations.

Financial Assistance

Yes, financial incentives for building an Accessory Dwelling Unit (ADU) are available in Solana Beach, California. Notably, the California Housing Finance Agency (CalHFA) offers an ADU Grant Program providing grants for associated project costs such as permits, property surveys, design fees, and predevelopment expenses. Additionally, the City of Solana Beach has considered local incentives, including fee waivers or reduced parking requirements, particularly for deed-restricted units. To explore current opportunities, homeowners should consult directly with the Solana Beach Community Development Department and regularly monitor updates from CalHFA regarding available financial assistance.

Environmental Considerations

In Solana Beach, California, constructing an Accessory Dwelling Unit (ADU) requires meeting sustainability standards designed to encourage environmental responsibility and energy efficiency. Notably, detached ADUs must incorporate photovoltaic (solar) systems in alignment with the city’s Climate Action Plan. Additionally, projects within the Coastal Zone must comply with the Local Coastal Program’s sustainability guidelines. ADUs should also match the design and materials of the primary residence, potentially involving sustainable or energy-efficient materials. Homeowners are encouraged to consult the Solana Beach Community Development Department early in the planning process for detailed requirements and recommendations related to sustainability compliance.

In Solana Beach, California, Accessory Dwelling Units (ADUs) must comply with the California Building Energy Efficiency Standards, known as Title 24, which include strict energy-efficiency requirements. These standards cover insulation, windows, HVAC systems, and lighting, typically necessitating energy-efficient solutions like LED lighting and high-quality insulation. Additionally, new detached ADUs are required to include solar photovoltaic (PV) systems and must be designed to accommodate future energy storage systems (ESS-ready). ADUs must also have electrical panels with a minimum 225-amp rating to meet these requirements. Property owners should consult the Solana Beach Community Development Department or local experts to ensure compliance with current energy efficiency regulations.

Process and Timeline

In Solana Beach, California, the timeline for obtaining an Accessory Dwelling Unit (ADU) permit generally ranges from 4 to 6 months, depending on the project’s complexity and its location within the Coastal Zone. The permitting process involves an initial planning review, comprehensive departmental review (Planning, Engineering, Fire), and approval from the California Coastal Commission due to the city’s coastal location. While typical projects may take around 4 months, Coastal Zone considerations can extend this timeline. California state law requires municipalities to complete ADU permit reviews within 60 days of receiving a complete application. To streamline approval, homeowners should consult early with the Solana Beach Community Development Department and ensure all documentation is accurately prepared.

Constructing an Accessory Dwelling Unit (ADU) in Solana Beach requires following a structured permitting process that involves several key stages. Initially, applicants must electronically submit a Building Permit Application with detailed plans to the Planning Department for preliminary review. Upon acceptance, the application undergoes comprehensive evaluation by multiple city departments, including Planning, Building, Engineering, and Fire. Because Solana Beach is located within the California Coastal Zone, obtaining a Coastal Development Permit (CDP) from the California Coastal Commission is also mandatory. Final issuance of the building permit by the city can only occur once all reviews, including the CDP, are completed and approved. Engaging early with the Solana Beach Community Development Department and ensuring thorough and accurate documentation can help streamline this permitting process.

Solana Beach ADU Regulations Comparison Chart

Understanding local ADU regulations is crucial for a successful project. This chart provides a clear side-by-side comparison of Solana Beach’s requirements for Single-Family ADUs, Junior ADUs (JADUs), and Multifamily ADUs, helping homeowners and developers navigate what’s allowed based on their property type.

RegulationSingle-Family ADUJunior ADU (JADU)Multifamily ADUs
Size Limits850 sq. ft. (1-bedroom), 1,000 sq. ft. (2+ bedrooms)500 sq. ft.850 sq. ft. (1-bedroom), 1,000 sq. ft. (2+ bedrooms)
Living FacilitiesMust have independent living, cooking, sleeping, sanitation facilitiesEfficiency kitchen required, shared sanitation allowedMust have independent living facilities
Number of Allowed ADUs1 converted ADU (existing space) + 1 detached ADU + 1 JADU within primary home1 JADU per single-family home (within existing space)Up to 25% of existing units as conversion ADUs, plus up to 8 detached ADUs (not exceeding existing unit count)
ADU Setback Regulations4 ft. side and rear; front setback follows zoning requirementsSame as primary dwelling structure4 ft. side/rear; front setback per zoning
Height Restrictions16 ft. standard; up to 18 ft. within ½ mile of transit (+2 ft. if roof matches primary dwelling)Same as primary structure16 ft. standard, up to 18-20 ft. near transit
Building Separation6 ft. min., 10 ft. if entrance faces another structureNot applicable6 ft. min., 10 ft. if entrance faces another structure
Minimum Floor AreaNo minimum specifiedNo minimum specifiedNo minimum specified
Owner Occupancy RequirementsNot requiredOwner must occupy JADU or primary dwellingNot required
Soils Report RequirementNot typically requiredNot requiredNot typically required
Building Verification SurveyNot required.Not required.Required if property boundaries or setbacks are unclear
Stormwater Mitigation RequiredNot requiredNot requiredNot required
Permitting TimelinesTypically 4-6 monthsTypically 2-3 months3-4 months (conversion), 4-6 months (detached)
Construction RegulationsDesign must match primary dwelling and comply with zoningMust be within primary residenceMust match existing structure design and comply with zoning
Owner OccupancyNot requiredRequired (owner must occupy primary or JADU)Not required
Landscaping RequirementsMust comply with Water Efficient Landscape RegulationsMust comply with Water Efficient Landscape RegulationsMust comply with Water Efficient Landscape Regulations
Permit & Impact Fees$8-$12 per sq. ft. plus specific listed impact feesPermit fees apply, typically lowerFees apply per unit; typically higher for detached ADUs
Solar and Sprinkler RequirementsSolar required for new detached ADUs; sprinklers if main house has themNo solar requirement; sprinklers if main house has themSolar rules unclear; sprinklers required if main building has them
Coastal Permit RequiredYesYesYes
Rental RestrictionsRentals must be 30 days or longer; no short-term rentalsRentals permitted, minimum 30 daysRentals must be 30 days or longer; no short-term rentals
Separate Sale of ADU AllowedNot permittedNot permittedNot permitted
ADU Address RequiredYes, separate address requiredNo separate addressYes, separate address required for each ADU

Calculate Your ADU Cost in Solana Beach

Using the tool below, you will be able to calculate your ADU cost in Solana Beach based on the type and size of the ADU you are interested in building on your property.

Attached ADU

400 sqft

Estimated Cost

$180000

*The costs we are calculating here are an average for time and materials. This calculator is meant to provide an estimate to educate you on the ADU building process, please note that this is not a final quote.

Detached ADU

400 sqft

Estimated Cost

$180000

*The costs we are calculating here are an average for time and materials. This calculator is meant to provide an estimate to educate you on the ADU building process, please note that this is not a final quote.

Garage ADU

400 sqft

Estimated Cost

$180000

*The costs we are calculating here are an average for time and materials. This calculator is meant to provide an estimate to educate you on the ADU building process, please note that this is not a final quote.
Bring your dream to life

Next Steps for Your ADU Project in Solana Beach

At Better Place Design & Build, we’ve got navigating ADU regulations in Solana Beach down to an art, so you don’t have to worry about the complexities. With our expertise in local zoning laws, building codes, and the specifics of coastal development, you can rest easy knowing we’re handling everything. Our one-stop-shop approach means that permits and inspections are off your plate. Are you looking for the best ADU builders in Solana Beach? We’ve got you covered. We understand the importance of balancing Solana Beach’s’ need for housing with preserving its unique coastal charm, and we’re here to make sure your ADU adds value and utility to your property seamlessly.

Share via

Facebook Gmail Twitter WhatsApp

https://betterplacedesignbuild.com/adu-regulations/solana-beach/