Building an ADU in Garden Grove, California

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Overview

Garden Grove is located in Orange County in California. Garden Grove has a total population of 170883 over a land mass of 17.94 Square Miles. When it comes to ADUs, the city allows for 1+ ADUs on a given property, and a square footage of 850-1,000 sf

Number of ADUs Allowed

1+

Size of ADU Allowed

850-1,000 sf

Types of ADUs Allowed

Detached, Junior, Attached

Permit Cost

Coming Soon

Number of ADUs allowed

According to state law, all single-family homes are allowed at least one Accessory Dwelling Unit. Additionally, single-family lots which are owner-occupied may create one Accessory Dwelling Unit and one Junior Accessory Dwelling Unit. Also, multi-family lots may now add one ADU per every four existing residential units, so long as they were legally established.

Property Requirements

Residential properties will be approved to add up to 850 square ft. for a one bedroom ADU or up to 1,000 square ft. for a two bedroom ADU, regardless of the underlying zoning standards of the property. A Junior Accessort Dwelling Unit (JADU) is approved up to 500 square ft.. According to Califronia Residential Code, the minimum size of any living unit is 150 square ft. (including Accessory Dwelling Units and Junior Accessort Dwelling Unit (JADU)s). ~ Updated: State Law AB-68

Types of ADUs Allowed

Attached ADU

An attached ADU is one that is attached to your house. Also know as Addition ADUs or “bump-out ADUs. These types of ADUs can be accessed from the primary house with a door in the connection point, but also can be independent of the main home.

Dettached ADU

A detached ADU is not connected to your primary house. The dwelling needs to be within your property setbacks and allowable building size (both height and square footage).

Junior ADU

Junior Accessory Dwelling Units (JADUs) are named this way because they are small (up to 500 square feet).

In California, the recent state bills AB68 and AB 881 permits both an ADU and a Junior ADU (JADU) on the same lot with a proposed or existing single-family dwelling. This means you can have two units on your lot: ADU, and JADU.

Property Requirements

Ownership
Owner-occupancy will not be required for new Accessory Dwelling Units (conversion and new construction) built between 2020 and 2025. ~ Updated: State Law SB-13
Number of ADUs Allowed
According to state law, all single-family homes are allowed at least one Accessory Dwelling Unit. Additionally, single-family lots which are owner-occupied may create one Accessory Dwelling Unit and one Junior Accessory Dwelling Unit. Also, multi-family lots may now add one ADU per every four existing residential units, so long as they were legally established.
ADU Size
Single family and multi-family residential lots will not be subject to the minimum lot size of the underlying zoning district or by ordinance for Accessory Dwelling Unit (ADU) projects. ~ AB68
Parking
Lots which convert an existing garage to an ADU or JADU will not be subject to replacement parking requirements. ~ AB68 & AB881 Update
Height
Detached accessory dwelling units shall be one story, constructed at ground level, and shall not be more than 17 feet in height measured from ground level to the highest point on the roof. Attached accessory dwelling units developed as additions to primary dwelling units shall be subject to the height limits and related standards applicable to additions to existing single­ family residences.
Fire Safety
An accessory dwelling unit shall not be required to provide fire sprinklers if they are not required for the primary unit. The ADU shall be setback at a distance sufficient for fire safety.
Utility Connections
Accessory dwelling units shall not be considered new residential uses for the purposes of calculating connection fees or capacity charges for utilities, including water and sewer service. Adequate infrastructure, including, but not limited to, sewer and water services and streets sufficient for traffic flow and circulation, shall be available within the residential neighborhood in which an accessory dwelling unit not located within the space of an existing structure is proposed to be located to serve such accessory dwelling unit, as determined by the Public Works Director.
Aesthetic
An ADU shall be held to the standards of existing single­ family residences, including, but not limited to, all standards for front, rear, and side yard setbacks, height, lot coverage, lot width, building placement, design and architectural compatibility, driveway width, screening of mechanical equipment and metering devices, landscaping, walls, fences, hedges, and parking spaces.
Set backs
The maximum required setback for a detached new construction Accessory Dwelling Unit shall be no more than 4 feet from the rear and side property lines. Setbacks will not be required for Accessory Dwelling Units and Junior Accessort Dwelling Unit (JADU)s 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. ~ According To AB68

Design Review

Applications for development of an accessory dwelling unit must be submitted to the Director on a form prepared by the city and must include all information and materials proscribed by such form. No application shall be accepted unless it is completed as prescribed and is accompanied by payment for all applicable fees. The Director shall ministerially review and approve or disapprove a complete application for an accessory dwelling unit within 120 days of submittal of a complete application. Review is limited to ensure that the accessor y dwelling unit complies with the requirements of this subsection. Any Other that is unable to comply with the development standards and conditions of this subsection shall first apply for and secure the approval of a variance pursuant to the provisions of this code before a ADU may be approved. Accessory dwelling units shall not be considered new residential uses for the purposes of calculating connection fees or capacity charges for utilities, including water and sewer service.

Next Steps

To get started on your ADU, here are some first steps.

Call Your City

Search Google for your city’s contact number. An example would “City of Phoenix Residential Permits Contact Number”

You can call the main line and get directed to the permitting department.

Ask these questions...

1) Can I put a secondary home on my lot (Accessory Dwelling Unit)
2) What are my livable setbacks, and ADU size regulations?
3) Can I put a prefabricated guest house on my property?

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