ADUs on Multifamily Parcels in Sacramento

Accessory dwelling units (ADUs) are among the most effective ways to expand housing opportunities in California, and Sacramento has embraced them as part of its housing strategy. While ADUs are often associated with single family home properties, recent state law changes now allow ADUs on multifamily parcels in Sacramento, offering new opportunities for property owners. These rules make it possible to add additional units to existing residential properties, including apartments and multifamily housing, helping to expand Sacramento’s rental market and increase affordable housing options.

What Are ADUs on Multifamily Parcels?

ADUs on multifamily parcels are accessory dwelling units built on properties already developed with two or more dwelling units. This includes apartments, duplexes, and other multifamily housing structures. State law and Sacramento zoning regulations allow both attached ADUs and detached ADUs on these parcels. Junior accessory dwelling units (JADUs) may also be created within existing primary structures, giving property owners even more flexibility.

Opportunities for Property Owners

For Sacramento property owners, adding ADUs on multifamily parcels can significantly increase rental income, boost property value, and maximize the use of existing space. Owners can build attached or detached ADUs, convert existing structures like detached garages, or develop new units near rear property lines. By creating additional units on multifamily lots, property owners contribute to affordable housing while gaining long-term financial benefits.

Zoning Regulations and Development Standards

ADUs on multifamily parcels in Sacramento are permitted under state law, but zoning district requirements and development standards still apply. Property owners must review:

• Maximum square footage: Detached ADUs may not exceed 1,200 square feet, while conversion ADUs must fit within the existing structure’s floor area.
• Number of ADUs permitted: On multifamily parcels, two detached ADUs are allowed in addition to attached or conversion ADUs within existing structures.
• Setback requirements: Minimum setbacks, including rear setbacks, front setbacks, and yard setbacks, vary based on zoning regulations and property lines. Detached ADUs often require at least four feet from side and rear property lines.
• Height limits: Detached ADUs may be up to two stories but must comply with maximum height limits and fire safety requirements.
• Parking requirements: Some ADUs may require replacement or additional parking spaces, unless exemptions apply near public transit or in historic districts.

Types of ADUs Allowed on Multifamily Parcels

Sacramento homeowners and property owners can explore several types of ADUs permitted on multifamily lots:

• Conversion ADUs: Units created by converting existing non-livable space, such as storage rooms, basements, or detached garages.
• Attached ADUs: Additions connected to the main residence or multifamily structure, offering new living space while meeting building codes.
• Detached ADUs: Separate structures located near rear property lines, often functioning as one bedroom or studio units with independent access.
• Junior ADUs: Smaller units carved from the primary residence or multifamily building, usually under 500 square feet, with their own entrance and bathroom.

The Permit and Construction Process

Building an ADU on a multifamily parcel requires a structured approach:

1. Plan the project by deciding whether to build a detached ADU, attached ADU, or conversion ADU within existing space.
2. Review zoning requirements for the property’s district, including setbacks, height limits, and maximum square footage.
3. Prepare site plans showing property lines, the main house or multifamily structure, and proposed ADU locations.
4. Submit an ADU permit application to the Sacramento planning department, including construction drawings and compliance details.
5. Pay impact fees and building permit fees as required by Sacramento County or the City of Sacramento.
6. Begin ADU construction with licensed contractors, ensuring compliance with fire safety, utilities, and local building codes.
7. Schedule inspections to verify electrical, plumbing, and structural systems meet applicable standards.

Costs and Financial Considerations

ADU cost on multifamily parcels varies based on ADU size, location, and construction type. Garage conversions or conversion ADUs using existing space typically cost less than building detached units. Construction cost also varies based on labor costs, materials, and site conditions. Property owners may explore financing options such as home equity loans, construction loans, or local grants designed to assist homeowners in ADU development. While upfront costs can be substantial, the long-term rental income and property value increases often outweigh expenses.

Local Regulations and Special Considerations

Sacramento property owners must ensure compliance with local regulations and zoning ordinances. In some cases, special review may apply to historic districts, lots adjacent to public streets, or multifamily sites with existing parking lots. Local governments also ensure that building permits and approvals align with the California Building Code, fire safety laws, and other applicable regulations. While ADUs are permitted under state law, local jurisdictions control the details of implementation and enforcement.

Long-Term Benefits for Sacramento Residents

ADUs on multifamily parcels offer several long-term benefits:

• Increased rental income opportunities for property owners.
• Expanded housing supply that addresses Sacramento’s affordable housing needs.
• Efficient use of existing property and underutilized spaces.
• Improved property value by adding legal dwelling units.
• Flexibility to adapt properties to market demand and tenant needs.

Final Thoughts on ADUs on Multifamily Parcels in Sacramento

ADUs on multifamily parcels in Sacramento represent a valuable opportunity for property owners to expand rental income, increase property value, and contribute to the city’s housing development goals. By following zoning requirements, setback rules, and permit processes, Sacramento homeowners can build attached or detached ADUs that comply with state law while meeting the needs of tenants and the community. A+ Construction & Remodeling assists property owners across Sacramento with ADU planning, design, permitting, and construction, ensuring every project is built efficiently, safely, and with long-term value in mind.