City ADU planning guide

Compton 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.

Compton 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.

Compton, CA, follows California state law regarding ADU regulations while incorporating some local policies. Here’s a detailed guide to ADU regulations in Compton:

Types of ADUs Permitted:

  • Detached ADUs Standalone units separate from the main dwelling.
  • Attached ADUs Units attached to the primary residence, sharing one or more walls.
  • Garage Conversions Legal garages can be converted into ADUs.
  • Junior ADUs (JADUs) Units up to 500 sq. ft., created within the existing primary structure, requiring an efficiency kitchen and separate entrance.

Zoning and Lot Requirements:

  • ADUs are allowed in residential zones (R-1, R-2, etc.).
  • No minimum lot size restrictions apply, consistent with state law.

Size Limits:

  • Detached ADUs Maximum of 1,200 sq. ft.
  • Attached ADUs Limited to 50% of the main residence's size, up to a maximum of 1,200 sq. ft.
  • JADUs Maximum of 500 sq. ft.
  • Minimum size 150 sq. ft. (per California Building Code for efficiency units).

Setbacks:

  • Rear and side setbacks Minimum of 4 feet for new ADUs.
  • Front yard setbacks Must comply with existing zoning standards for the primary structure.

Height Limits:

  • One-story ADUs Up to 16 feet in height.
  • Two-story ADUs Up to 18 feet or taller if located near a transit corridor or built to replace an existing two-story accessory structure.

Parking Requirements:

  • No Parking Required
    • If the ADU is within ½ mile of public transit.
    • If located within an existing structure (e.g., a garage conversion).
    • If the ADU is part of a historic district where parking cannot be reasonably added.
    • If parking is required: One parking space per ADU or per bedroom, which may be tandem or located in driveways.

Owner-Occupancy:

  • For ADUs No owner-occupancy requirement for units approved from January 1, 2020, through 2025.
  • For JADUs Owner occupancy is mandatory; the owner must reside in either the JADU or the primary residence.

Utility Connections and Fees:

  • Utility Connections
    • Detached ADUs generally require new utility connections.
    • Attached ADUs and JADUs may share existing utilities.
  • Impact Fees
    • Waived for ADUs under 750 sq. ft.
    • Larger units may incur proportional impact fees based on their size relative to the primary dwelling.

Design and Privacy Standards:

  • ADUs must complement the architectural design of the main residence.
  • Privacy considerations include window and door placements that minimize views into neighboring properties.
  • Landscaping or fencing may be required for additional privacy and aesthetic alignment.

Permitting Process:

  • Streamlined Process ADU applications must be reviewed and approved within 60 days if compliant with all requirements.
  • Submission Requirements
    • A detailed site plan showing the ADU's location, setbacks, and access points.
    • Floor plans, elevations, and roof plans.
    • Proof of compliance with zoning, design, and building codes.

Additional Notes:

  • Affordable Housing Incentives:
    • Compton may offer incentives for ADUs rented at affordable rates.
  • Green Building Compliance
    • Solar panel installations may be required for new detached ADUs.
  • Historic Properties
    • Additional restrictions may apply for properties in designated historic districts.

Next Steps:

  • Verify Property Zoning Use Compton’s zoning map or contact the Planning Division to confirm zoning specifics for your property.
  • Pre-Application Consultation Engage with Compton's Planning Division for preliminary feedback and guidance.
  • Prepare Plans Work with a licensed designer or architect familiar with ADU codes in Compton.
  • Submit Your Application
    • Provide all required documentation, pay fees, and follow up with the Planning Division for updates.
Show More

ADU planning resources

Explore ADU service areas and planning next steps

Compare nearby ADU city pages, review plan options, and move from early research to a property-specific ADU conversation.

Start here

Compare detached ADU plans

Review sizes, layouts, and configurable ADU options before your feasibility call.

Browse ADU plans
Budget

Understand ADU financing

See common funding paths and how homeowners think about ADU return potential.

Explore ADU financing
Process

Know what happens next

Walk through feasibility, design, permitting, and construction with Metricon Homes.

See how ADUs work

More ADU service areas

Bay Area ADUsCosta Mesa ADUsLos Angeles ADUsOakland ADUsSacramento ADUsSan Diego ADUsSan Francisco ADUsSan Jose ADUs

Build Your ADU with Metricon Homes

Metricon Homes helps you plan and build a fully custom Accessory Dwelling Unit tailored to your property, lot, and local regulations. From feasibility and design through permitting and construction, our team manages the entire process so you can add flexible living space, host family, or generate rental income with confidence.

Contact us today for a free property assessment and start planning your ADU.

CALL (833) 400-2497

Explore our ADU plans

Contact Us(833) 400-2497