Pomona

In Pomona, Accessory Dwelling Units (ADUs) are permitted in all residential zones as part of the city’s effort to increase housing supply while maintaining neighborhood character. Generally, each eligible lot may include one ADU and one Junior ADU (JADU) if the property and existing structure meet the required conditions.

ADU applications are reviewed through a ministerial process, meaning there is no discretionary approval or public hearing if the project complies with all standards. However, all projects must still follow both California state law and Pomona’s local zoning regulations to ensure proper development and neighbourhood compatibility.

Pomona aligns with California’s broader ADU legislation but has its own requirements for height, setbacks, and design review.

• Detached ADU: A standalone structure on the same lot as the primary residence
• Attached ADU: Connected to the main home
• Conversion ADU: Created by converting existing space (garage, basement, interior area)   
• Junior ADU (JADU): A smaller unit within the main home, typically up to 500 sq ft

• Maximum Size:
  
  • Detached: up to 1,200 sq. ft 
  • Attached: up to 50% of primary dwelling size or 1,200 sq ft
    
    
• Setbacks:
  
  • Standard requirement: 4 feet from side and rear property lines 
  • Converted structures (garage/interior) may have reduced or no setback requirements
    
    
• Height Limits:
  
  • Detached: generally, up to 16 feet
  • Attached: may go up to 25 feet depending on zoning and structure type.
    
    
• Parking Requirements:
  
  • Typically, 1 parking space required per ADU
  •  Parking is not required if:
    
    • Located within ½ mile of public transit 
    • Converted from existing structure
    • Located in qualifying conditions under state law

To build an ADU in Pomona, applicants must submit:

• Building permit application
• Site plan and architectural drawings
• Structural and safety compliance documents
• Utility and impact fee documentation
• Zoning compliance review

Homeowners should also review Pomona current fee schedule, utility connection requirements, and fire code compliance.

ADU applications in Pomona must be reviewed within 60 days once a complete application is submitted, as required under California state law. However, delays can occur if corrections are needed or if required documents are missing during the review process. 

In practice, the overall timeline from submission to permit issuance typically ranges from about 2 to 4 months, depending on the complexity of the project and how quickly revisions are addressed.

In Pomona, ADUs are permitted in all residential zones and there is no minimum lot size requirement under state law. However, all projects must comply with local regulations, including Zoning Code Section 830.A and Ordinance No. 4281.

In addition, ADUs must meet applicable fire safety, building, and utility codes to ensure safe and compliant development. These combined standards help regulate design, placement and construction while still allowing flexibility for additional housing.

For the most current and complete information, refer directly to the City of Pomona.

Their official resources provide detailed guidance on ADU eligibility, application procedures, and compliance requirements. You should also review the city’s zoning code (including Section 830.A and Ordinance No. 4281) along with the official ADU standards and permit guides. These documents outline key regulations related to design, safety and development standards to ensure full compliance with local and state laws.