South Pasadena

South Pasadena follows California’s ADU laws, allowing both ADUs and JADUs on residential properties with an existing or proposed primary home. Compliant projects are approved ministerially, meaning no public hearings are required, which helps streamline the process.

However, the city adds local requirements related to historic preservation, tree protection, and site conditions. In some cases, property owners must secure specific clearances before submitting an ADU application, making early planning important.

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

• Detached ADU: A standalone residential unit located on the same lot as the primary home.
• Attached ADU: A unit connected to the primary residence
• Conversion ADU: Created within existing space such as a garage or portion of the home
• Junior ADU (JADU): A smaller unit within the primary residence (typically limited to 500 sq. ft under state law)

• Maximum Size:
  
  • Detached: Detached units are guaranteed at least 800 sq. ft regardless of lot constraints under state law. In most cases, they can be built up to 850 sq. ft for a one-bedroom unit or 1,000 sq. ft for units with two or more bedrooms.
  • Attached: Attached units follow similar size limits of 850 sq ft (1 bedroom) or 1,000 sq ft (2+ bedrooms), but they may also be restricted by a maximum percentage of the existing primary dwelling’s floor area, depending on local rules.
    
    
• Setbacks:
  
  • Typically, minimum 4 feet from side and rear property lines
  • Conversions within existing structures may be exempt
    
    
• Height Limits:
  
  • Detached ADUs generally allowed up to 16 feet minimum
  • May increase depending on lot conditions and state allowances
    
    
• Parking Requirements:
  
  • Parking is often not required if:
    
    • The property is near public transit    
    • The ADU is created within existing space
    • The property is in a historic district

According to the official ADU application form, you will need:

• Completed ADU permit application (fillable PDF)
• Property and ownership details
• Project description (type, size, scope)
• Site plan and architectural drawings
• Supporting documentation
• Owner authorization

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

ADU permit applications must be reviewed within 60 days once deemed complete, as required by California law. However, delays are common and usually stem from missing documents, required pre-clearances, or plan check corrections. As a result, the overall timeline from initial preparation to final approval typically ranges from about 2 to 4 months. 

Engaging professionals familiar with South Pasadena ADU process can help streamline approval and potentially reduce delays.

ADUs are permitted in most residential zones and, under California state law, there is no minimum lot size requirement for development. However, additional constraints may apply depending on the property, particularly if it is located within a historic district, an environmentally sensitive area, or includes protected trees, which can introduce additional review or clearance requirements.

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

It’s best to consult the official city website, particularly the City of South Pasadena Community Development section. This includes access to ADU application forms, planning guidelines and development resources, all of which provide the most reliable details for current requirements and procedures.