City ADU planning guide

Pleasanton ADU regulations and next steps

Start with the most important planning decisions, then review the detailed city rules below before choosing a detached ADU plan or requesting a property-specific feasibility review.

Pleasanton ADU rules overview

Detailed local requirements vary by property. Use this section as a starting point for setbacks, parking, height, utilities, and approval considerations.

Lot fit

Setbacks and buildable area

Start with rear and side setbacks, lot coverage, access, and where a detached ADU can realistically sit on the property.

Design limits

Size, height, and unit type

Check whether the property is better suited for a detached ADU, attached ADU, garage conversion, or junior ADU.

Approvals

Parking, utilities, and permits

Confirm parking exemptions, utility connection requirements, impact fees, and city review steps before finalizing plans.

Here’s a detailed overview of the Accessory Dwelling Unit (ADU) regulations in Pleasanton, CA:

Zoning and General Requirements:

  • Zoning Districts ADUs are permitted in most residential zones (e.g., single-family and multi-family residential zones).
  • Types of ADUs
    • Detached: Separate unit on the property.
    • Attached: Physically connected to the primary residence.
    • Conversion: Repurposed existing space, such as a garage or basement.
    • Junior ADU (JADU): A smaller unit (up to 500 sq. ft.) within the main home.

Size Restrictions:

  • Detached ADUs Up to 1,200 square feet.
  • Attached ADUs The lesser of 1,200 sq. ft. or 50% of the primary residence’s size.
  • Minimum Size 150 square feet (per state building code).
  • JADUs Up to 500 square feet.

Setbacks and Lot Coverage:

  • Setbacks
    • Rear and side setbacks: Minimum 4 feet.
    • No setbacks required for conversions of legally existing structures.
  • Lot Coverage Must comply with the maximum lot coverage requirements of the zoning district. For smaller lots, this may limit the size of your ADU.

Height Limits:

  • Detached ADUs
    • Single-story: Maximum height is 16 feet.
    • Two-story or above-garage ADUs: May be allowed up to 25 feet or match the height of the primary residence, depending on the zoning and design review.
  • Attached ADUs
    • Must comply with the height limits of the main dwelling.

Parking Requirements:

  • General Requirement One parking space per ADU.
  • Exemptions
    • Within ½ mile of public transit (e.g., BART or bus stops).
    • Located within a historic district.
    • The ADU is part of an existing primary residence or converted structure.
  • Tandem parking is permitted to meet parking requirements.

Owner-Occupancy:

  • ADUs No owner-occupancy requirement until at least 2025 (per California state law).
  • JADUs Owner-occupancy is required (either the JADU or the primary dwelling must be owner-occupied).

Utilities:

  • Water and Sewer New ADUs may require separate utility connections; however, fees for smaller ADUs (less than 750 sq. ft.) are limited by state law.
  • Energy Compliance ADUs must meet Title 24 energy efficiency standards, including proper insulation, efficient heating/cooling systems, and energy-efficient windows and doors.
  • Solar Panels Newly constructed ADUs require solar panel installations unless built with exemptions.

Design Standards:

  • Architectural Compatibility ADUs must complement the design of the primary residence (e.g., matching materials, colors, and rooflines).
  • Privacy Considerations Windows and doors should minimize views into adjacent properties.
  • Landscaping May be required to screen the ADU from neighboring properties.

Permitting Process:

  • Building Permits Required for all ADUs.
  • Application Requirements
    • Site plans.
    • Floor plans and elevations.
    • Title 24 energy compliance documentation.
  • Review Timeline Applications must be approved or denied within 60 days if submitted with a complete package.

Impact Fees:

  • ADUs ≤ 750 sq. ft. Exempt from development impact fees.
  • ADUs > 750 sq. ft. Subject to scaled impact fees based on size.

Special Considerations:

  • Historic Properties Additional restrictions may apply for ADUs on properties in historic districts.
  • Fire Safety ADUs may require fire sprinklers if the primary residence has them.

Resources:

  • Contact the Planning Division for pre-application consultations to address specific questions or unique site challenges.
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