San Diego

Detached ADUs

Independent living units up to 1,200 sq. ft.

Attached ADUs

offering up to 1,200 sq. ft. with direct connection

Conversion ADUs

Conversion ADUs: Transform Existing Spaces

JADUs

Affordable 500 sq. ft. units within existing homes.

Key Requirements of
Detached ADU

  • Maximum Size: Up to 1,200 sq. ft.

  • Height: Allowed up to local height regulations, including two stories.

Setbacks:

  • Front Yard: Must comply with zoning rules.

  • Side and Rear Yards: Minimum 4 feet.

Parking:

  • Rules: No parking required under most conditions.

  • Exemptions: Parking is waived for ADUs located near public transit.

Key Requirements of Attached ADU

  • Maximum Size: Up to 1,200 sq. ft.

  • Height: Must adhere to the height of the primary home.

Setbacks:

  • Front Yard: Subject to zoning rules.

  • Side and Rear Yards: Minimum 4 feet.

Parking:

  • Rules: Parking requirements are flexible and often waived.

  • Exemptions: Waived if the ADU is near public transit or involves a conversion of an existing garage/carport.

Key Requirements of Conversion ADU

  • Maximum Size: Based on the existing space’s size; no additional square footage limits.

  • Height: Matches the converted structure’s existing height.

Setbacks:

  • Front Yard: Must follow zoning rules.

  • Side and Rear Yards: Setbacks are waived if converting existing structures.

Parking:

  • Rules: No replacement parking required for conversions of garages or similar structures.

  • Exemptions: Parking exemptions apply near public transit.

Key Requirements of JADUs

  • Maximum Size: 500 sq. ft.

  • Heights: Matches the height of the primary home.

Setbacks:

  • Front Yard: Subject to zoning rules.

  • Side and Rear Yards: Waived for conversions within the existing structure.

Parking:

  • Rules: No parking is required for JADUs.

  • Exemptions: Parking requirements do not apply to JADUs.

San Diego

Additional Requirements in San Diego

What is the maximum size for a detached ADU in San Diego?

Answer: Detached ADUs can be up to 1,200 sq. ft.

Can I build a two-story ADU?

Answer: Yes, two-story ADUs are allowed but must comply with local height regulations.

Are parking spaces required for ADUs?

Answer: No parking is required if the ADU is near public transit or involves a conversion of an existing structure.

What is the size limit for attached ADUs?

Answer: Attached ADUs can be up to 1,200 sq. ft. while adhering to floor area ratio limits.

How long does it take to obtain permits for ADUs?

Answer: Permitting typically takes 4–6 months.

Can I convert my garage into an ADU?

Answer: Yes, garages and similar spaces can be converted without requiring replacement parking.

Do I need a coastal permit for ADUs in coastal zones?

Answer: Yes, coastal development permits are required for ADUs in coastal overlay zones.

What are the setback requirements for ADUs?

Answer: ADUs must be at least 4 feet from side and rear property lines.

Can I sell my ADU separately from the main home?

Answer: No, ADUs cannot be sold separately unless very specific affordable housing criteria are met.

Do JADUs require owner-occupancy?

Answer: Yes, the property owner must reside in either the primary residence or the JADU.

Success Stories

Every project tells a story of transformation. At CRS Builders, we craft more than structures—we shape environments that inspire and elevate. Discover how homeowners across San Diego have reimagined their spaces with our expertise, creating lasting impressions and meaningful living experiences.

San Diego

4885 Ronson Ct Suite J,

San Diego 92111

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