Casa De Oro Mount Helix ADUs

Everything about building Accessory Dwelling Units in Casa De Oro Mount Helix, CA

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495 sqft

1,157 sf
2 Beds

Casa De Oro Mount Helix ADU Guidelines Last Updated 01/26/21

Casa De Oro Mount Helix is a Census Designated Place within the unincorporated jurisdiction of San Diego County, CA.

Number of ADUs allowed:

Under state law, each single-family home may now add at least one ADU. Owner occupied single-family parcels may add one ADU and one JADU. Multi-family parcels, per every four existing residential units, may add one ADU, so long as the existing units were legally established.

Types of ADUs allowed:

Detached ADU, Attached ADU, Junior ADU are allowed. ADUs may be new construction or converted from existing space. JADUs must be converted from existing space.

Lot size:

Single family and multi-family residential parcels will not be subject to the minimum lot size of the underlying zoning district or by ordinance for Accessory Dwelling Unit projects. ~ AB68

ADU size:

Residential properties will be approved to create up to 850 sq. ft. for a one bed ADU or up to 1,000 sq. ft. for a two bed ADU, regardless of the underlying zoning standards of the property. A Junior Accessort Dwelling Unit (JADU) is approved up to 500 sq. ft.. According to California Residential Code, the minimum size of any living unit is 150 sq. ft. (including Accessory Dwelling Units and Junior Accessort Dwelling Unit (JADU)s). ~ According To AB68


Newly constructed detached Accessory Dwelling Units can be as close as 4 feet from the rear and side property lines. Setbacks will not be required for Accessory Dwelling Units and JADUs converted from existing space that was legally eastablished. Attached Accessory Dwelling Units and conversions from existing space to be expanded will be required to comply with the setbacks of the underlying zone. ~ Updated: State Law AB-68


Replacement parking shall not apply to lots which convert an existing garage to an ADU or Junior Accessory Dwelling Unit. ~ Updated: State Law AB-68

Fire Safety:

Accessory dwelling units shall not be required to provide fire sprinklers if they are not required for the primary residence and may employ alternative methods for fire protection. (State requirements)

Shape, materials and style:

State Standards don't specify design restrictions.


State Standards don't specify height restrictions.

Design review:

State Standards don't require any additional design review.

Number of Bedrooms:

Not specified by State Standards.


Owner-occupancy will not be required for new ADUs (conversion and new construction) built between 2020 and 2025. ~ Updated: State Law SB-13

Utility connections:

Local health officer approval where a private sewage disposal system is being used, if required. (State requirements)

Allowed Zones:

*** Beginning in 2020, according to state law, all residential zoning districts, including single-family and multi-family, are allowed to build Accessory Dwelling Units. ***

Residential Building Code:

The California Building Code (CBC) 2019 is adopted.

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