The City of Pittsburg permits ADUs across most residential zones. Pittsburg follows both state and local ADU laws, allowing most single-family homes to build one detached ADU and one Junior ADU (JADU) per lot. Multi-family properties may be eligible for multiple ADUs, depending on site conditions.

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

• Detached ADU: An ADU that is physically separate from the primary building
• Attached ADU: An ADU that is physically attached to the primary building
• Conversion ADU: conversion of an existing space such as an existing master bedroom, attached garage, storage area, or an existing lawfully established accessory structure
• Junior ADU (JADU): A JADU is up to 500 sq ft. within existing space

• Maximum Size:
  
  • Detached: Up to 1,200 sq ft
  • Attached: 50% of the primary dwelling's living area or 1,200 sq ft
• Setbacks:
  
  • Minimum 4 ft from side and rear property lines
• Height Limits:
  
  • Detached: Typically 16 ft, unless otherwise specified
  • Attached: Typically 25 ft, unless otherwise specified.
• Parking Requirements:
  
  • Additional parking is not required if the ADU is:
    
    • The ADU will be located within 1/2 mile of a transit stop
    • The ADU will be located within one block of a carshare vehicle
    • The ADU will be located within a historic district
    • The ADU will be located where on-street parking permits are required but not offered to the ADU occupant

To build an ADU in Pittsburg, the following approvals are typically required:

• Zoning compliance review: Conducted by the Planning Division to ensure the ADU meets local codes for its location, size
• Site plan and elevations: Site plan shows property layout, ADU location, and setbacks
• Architectural drawings: Comprehensive construction plans including floor plans, sections, and details
• Structural calculations and engineering: Engineer-stamped documents proving structural safety and code compliance
• Title 24 energy documentation: Energy calculations and CF1R forms demonstrating compliance with state efficiency standards
• Permit submission: All documents are submitted digitally through the city's permit portal
  

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

Permit review times are expedited by state law and are typically completed within 30 days or less after a complete application is submitted. The timeline can vary based on project complexity and city workload. Projects requiring plan corrections or additional information may take longer. Engaging design professionals and consultants familiar with East Palo Alto's ADU regulations can help streamline the approval process.

Most residential zones are eligible for ADUs, including R-1, R-2, R-3, and R-4 zones. There are no minimum lot sizes for ADUs in Pittsburg. Some Planned Development zones may have specific restrictions.

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