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Los Angeles County, CA Accessory Structures: Garage Conversions (2026)

Few Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Garage conversion rules in Los Angeles County, CA, sometimes called garage-to-ADU or accessory living unit conversions, govern permits, ceiling height, egress, and parking replacement.

Key Facts

Replacement parking required: None
Former driveway usable for parking: Yes
Max floor area for conversion within footprint: No maximum
Setback for conversion within footprint: None required
Optional parking types: Covered, uncovered, or tandem

Summary

When a garage or carport is converted into an ADU in unincorporated LA County, no replacement parking is required for either the ADU or the primary residence.

City-specific rules exist: West Covina, El Monte, Carson, Compton, Burbank, South Gate, Pasadena, Pomona, Lakewood, Long Beach, Downey, Lancaster, Norwalk, Los Angeles, Santa Monica, and Inglewood have their own garage conversions rules that differ from Los Angeles County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

10. When a garage or carport is converted to an accessory dwelling unit, parking spaces for the primary residence shall not be required to be replaced. If parking is provided for the primary residence or residences, it may be provided as covered spaces, uncovered spaces, or tandem spaces, in compliance with Section 22.040.030.B (Use Restrictions) and Section 22.140.640 (Accessory Dwelling Units and Junior Accessory Dwelling Units).

Source: LA County Garage Conversion GuideView official code

Full Breakdown

If the property owner chooses to provide replacement parking, it may be covered, uncovered, or tandem. The former driveway area that previously served the garage may continue to be used for parking after conversion. ADUs converted within the existing garage footprint (plus up to 150 sq ft for ingress/egress only) have no floor-area maximum and require no setback. The ADU resulting from a garage conversion may only be rented on a long-term basis (more than 30 days).

Violations & Fines

Converting a garage without permits or creating nonconforming conditions is subject to enforcement under Chapter 22.242.

Frequently Asked Questions

If I convert my 2-car garage to an ADU, must I add 2 new parking spaces?

No: no replacement parking is required for either the ADU or the primary home.

Can I still use my driveway for parking after the garage is converted?

Yes: the area previously used as a driveway to the garage may still be used for parking.

Is there a size limit if I convert my garage to an ADU?

If the conversion stays within the existing garage footprint (plus up to 150 sq ft for ingress/egress), there is no maximum floor area.

Sources & Official References

[1]Los Angeles County Code of Ordinances (Municode)

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All Los Angeles County rules

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