Accessory Structures in Garden Grove, CA

If you live in Garden Grove or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Garden Grove has 5 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

ADU Rental Restrictions

Garden Grove bans short-term rentals of accessory dwelling units and junior ADUs. Municipal Code Section 9.54.060(B) requires any rental term to run 30 days or longer, and the same section bars selling or conveying an ADU or JADU separately from the primary residence.

Key details: Minimum rental term: 30 days. Short-term rentals under 30 days: Prohibited. Separate sale of ADU/JADU: Prohibited. JADU sale restriction: Recorded deed restriction required. General penalty: Up to $1,000 fine / 6 months jail.

Renting an ADU or JADU for less than 30 days violates Section 9.54.060(B) and is enforceable under the Municipal Code's general penalty, Section 1.04.010: a misdemeanor with a fine up to $1,000, up to six months in county jail, or both, with each day of an unlawful short-term booking treated as a separate offense; the City Attorney may instead charge it as an infraction.

ADU Impact Fees

Garden Grove waives development impact fees entirely for accessory dwelling units under 750 square feet. Municipal Code Section 9.54.090 charges impact fees on larger ADUs only in proportion to the primary dwelling's square footage, and excludes connection fees, capacity charges, and permit or plan-check fees from the impact-fee definition.

Key details: ADUs under 750 sq ft: No impact fee. ADUs 750 sq ft or more: Fee prorated to primary home size. Excluded from "impact fee": Connection, capacity, permit, plan-check fees. Legal basis: Gov. Code Secs. 66000, 66012.

There is no separate penalty clause for impact-fee disputes; fees are collected as a condition of building-permit issuance, and building without the required permit and fee payment is enforced as a misdemeanor under the Municipal Code's general penalty, Section 1.04.010, punishable by up to a $1,000 fine, six months in jail, or both.

ADU Rules

Garden Grove allows one ADU on any lot zoned for single-family or multi-family residential use under Municipal Code Section 9.54.020. JADUs are limited to lots zoned single-family. Multi-family lots may add up to eight detached ADUs, and the City reviews complete applications ministerially, without a hearing, within 60 days.

Key details: Max on single-family lot: 1 ADU + 1 JADU. Max detached ADUs, existing multi-family lot: 8 units. Min unit size: 150 sq ft (efficiency). Review type: Ministerial, no hearing. Standard review timeline: 60 days.

Building an ADU or JADU without a permit is enforced through the Municipal Code's general penalty at Section 1.04.010: a misdemeanor punishable by up to a $1,000 fine, six months in county jail, or both, with each day of an unpermitted structure treated as a separate offense. Code Enforcement can also pursue an unpermitted ADU as a zoning violation requiring correction or removal.

Shed & Carport Rules

A detached accessory structure in Garden Grove's R-1 zone maxes out at 800 square feet and 17 feet tall, and no more than three of them are allowed per lot. Small tool sheds and playhouses under 120 square feet skip the architectural-matching requirement as long as they sit toward the rear of the lot.

Key details: Max size per structure: 800 sq. ft.. Max structures per lot: 3 detached structures. Max height: 1 story, 17 feet. Tool shed exemption threshold: 120 sq. ft. roof area. Min separation from main house: 6 ft. walls, 4 ft. eaves.

Building a detached accessory structure over 800 square feet, over 17 feet, or as a fourth structure on the lot without a variance is a zoning violation subject to plan denial or code enforcement action. Installing a kitchen, more than a half bathroom, insulation, or heating/cooling equipment inside a shed violates Section 9.08.040.030(D) and can trigger a stop-work order or require removal of the noncompliant improvement.

ADU Owner Occupancy

Garden Grove does not require an owner to live on site to rent out a regular ADU. Municipal Code Section 9.54.060(C) treats ADUs and JADUs differently: owner occupancy is optional for a standalone or attached ADU, but a JADU requires the property owner to occupy either the JADU or the remaining primary home as a principal residence.

Key details: ADU owner-occupancy: Not required. JADU owner-occupancy: Required for owner of record. JADU exception: Government agency, land trust, housing org. JADU rule source: Recorded deed restriction, Sec. 9.54.050(I). If occupancy lapses: JADU becomes unhabitable, unrentable.

Renting a JADU without the required owner occupancy, or after occupancy has lapsed, violates the recorded deed restriction under Section 9.54.050(I) and Section 9.54.060(C)(2), and is enforceable as a Municipal Code violation under the general penalty at Section 1.04.010: a misdemeanor punishable by up to a $1,000 fine, six months in jail, or both, with continuing violations charged day by day.

The Bottom Line

Garden Grove's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Garden Grove is broadly strict or permissive.

All of the above reflects Garden Grove's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.