Garden Grove — Nonconforming Uses

Last reviewed: July 2, 2026

Overview

Garden Grove regulates nonconforming lots, structures, signs and uses through Chapter 9.36 of the Municipal Code. The City defines what counts as a nonconformity, limits how nonconforming uses can continue, sets rules for repairs/reconstruction, and provides procedures (including amortization and extensions) for phasing out certain nonconforming activities over time. See the City’s nonconformity definitions and continuance rules at § 9.36.020 and § 9.36.060 for the controlling language.

How the code treats nonconformities (core rules)

• What counts as a nonconformity: the Code defines nonconforming building/structure, nonconforming lot/parcel, and nonconforming use in § 9.36.020.

• Continuing an existing nonconforming use: a nonconforming use may continue but may not be expanded, moved to another site, or changed to a different nonconforming use without following the code’s processes; the limits are summarized in § 9.36.050 and § 9.36.060.

• Repairs, additions, and maintenance:

  • Nonconforming residential structures may be maintained and may receive limited additions consistent with Chapters 9.08 and 9.12 (see § 9.36.060.B and § 9.36.070.A).
  • Nonresidential nonconforming properties may be repaired and maintained provided there is no increase in floor area (§ 9.36.070.B).

• Reconstruction after damage: if a nonconforming structure is less than 50% destroyed (market value test) it may be rebuilt to the original footprint without increasing floor area; if destroyed more than 50% it generally may not be restored (§ 9.36.080).

• Abandonment and termination: the code specifies abandonment rules (e.g., continuous conforming use for six months or vacation for 90 days can extinguish nonconforming rights) in § 9.36.050.C.

• Amortization and extensions: the code allows the City to establish amortization periods for categories of nonconforming uses/structures and describes extension criteria (Planning Commission may extend upon finding private loss outweighs public gain) in § 9.36.110–.150 and specifically § 9.36.150.

• Signs: legally existing signs that no longer conform are treated as nonconforming and have their own rules and timeframes; see § 9.36.100.

District-by-district implications (how nonconforming rules interact with Garden Grove zone districts)

Note: the nonconforming rules in Chapter 9.36 apply citywide; below are how those rules typically interact with common Garden Grove zone districts as shown in the zoning tables and development chapters. For full permitted-use tables and dimensional standards consult the indicated chapters and tables.

When first referring to each related topic below, the City’s internal topic pages are linked: Garden Grove parking, development standards, design review, overlay districts, ADUs, California Building Standards Code, and variances and exceptions.

R-1 (Single‑Family Residential)

• Purpose & where it applies: the R-1 designation is the City’s single‑family residential district; residential standards and allowable improvements are developed in Chapter 9.08 (see cross-references in the nonconforming chapter).
• Typical permitted uses: single‑family homes and incidental accessory buildings; consult Chapter 9.08 for the full list and dimensional rules.
• Nonconforming treatment: an existing single‑family residential building may continue indefinitely (no automatic amortization for single‑family occupancy) and may receive additions subject to Chapters 9.08 and compliance with the continuance limits in § 9.36.060.B.1 and § 9.36.070.A. Verify whether an addition triggers design review or requires compliance with current development standards.

Multiple‑Family / Chapter 9.12 zones (R‑2 / R‑3 style standards)

• Purpose & where it applies: medium‑ and higher‑density residential districts are governed by Chapter 9.12.
• Typical permitted uses: duplexes, apartments, and other multi‑family residential uses per Chapter 9.12 and zone tables.
• Nonconforming treatment: multi‑family buildings may continue indefinitely; limited additional floor area may be allowed per Chapter 9.12 and subject to § 9.36.060.B.2 and § 9.36.070.A.1. ADU-related changes may implicate Chapter 9.54 (ADUs) and state ADU rules — see the ADU guidance linked above.

Commercial zones (C‑1, C‑2, C‑3) and Community Center (CC‑1/2/3)

• Purpose & where it applies: general and neighborhood commercial zones and CC community center zones are used for retail, offices, service uses; see the use tables in Chapter 9.18 (Table 9.18‑1) for exact permitted uses.
• Typical permitted uses: retail, restaurants, offices; some conditional uses (e.g., smoking lounges only in C‑2/C‑3 by conditional use per Section 9.18.030.330).
• Nonconforming treatment: nonconforming commercial uses may continue but may not expand; specialized rules exist for certain uses: nonconforming service stations cannot be reestablished after a 60‑day discontinuance (§ 9.36.060.C.1), and some uses such as smoking lounges that pre‑exist ordinance changes may continue only if operation does not cease beyond the time found in their specific subsection (e.g., 90 days for some lounge provisions cited in Chapter 9.18).

GGMU and NMU (Garden Grove Mixed Use / Neighborhood Mixed Use)

• Purpose & where it applies: mixed‑use zones GGMU‑1/‑2/‑3, NMU and Community Center subzones regulate vertical and horizontal mixes of residential and commercial uses; consult Table 9.18‑1 for permitted mixes.
• Typical permitted uses: mixed residential/commercial, live‑work, offices; accessory buildings may be allowed with caveats.
• Nonconforming treatment: the general Chapter 9.36 rules apply; because mixed‑use zones require specific development standards, any repair/addition that would increase nonconformity is limited by § 9.36.070 and site‑specific standards in Chapter 9.18 (e.g., site plan, parking, and landscaping requirements). Verify whether a proposed change triggers design review or parking adjustments under the City’s parking rules.

AR (Agricultural / Resource) and special districts

• Purpose & where it applies: AR and any overlay districts impose additional constraints; see Chapter 9.18 and the City’s overlay districts pages for where these apply.
• Nonconforming treatment: accessory and agricultural uses that become nonconforming are subject to the same Chapter 9.36 continuance, reconstruction and amortization rules; special standards in overlay or specific plan areas may add restrictions (the more restrictive standard controls). See § 9.36.040 and § 9.36.030 regarding structures and lots.

Quick reference table — decision‑relevant nonconforming standards

Checklist — what an applicant must satisfy (nonconforming‑use work)

• Confirm the nonconforming status and date of lawful establishment (use historical permits/records). See the definitions in § 9.36.020.
• Determine whether your proposed action is “maintenance/repair” only or an enlargement/addition. Additions that increase floor area or structural footprint are generally prohibited for nonresidential nonconforming uses (§ 9.36.070.B).
• For residential properties, ensure any additions comply with Chapters 9.08 or 9.12 and § 9.36.060–.070. Also check whether ADU rules in Chapter 9.54 apply and review ADU guidance.
• For nonconforming lots (pre‑1960 unimproved), apply for a variance if needed to build as if the lot were conforming (§ 9.36.030.A). See variances and exceptions.
• If rebuilding after damage, verify whether the damage exceeds 50% of market value — if so, restoration and continuance rights may be lost (§ 9.36.080).
• If the use is a service station or a regulated adult/other amortized use, confirm any specific amortization timelines and re‑establishment prohibitions (§ 9.36.060.C, § 9.36.120–.130).
• Check parking and landscaping requirements and whether the nonconformity is solely in those areas — those nonconformities may remain indefinitely (§ 9.36.040.C). Also consult the City’s parking standards.
• If seeking an extension of an amortization period, prepare findings and evidence addressing the ten factors listed in § 9.36.150.A.

Risks & Ambiguities

Plain‑English summary

If your property in Garden Grove was legal when it was created but no longer meets today's zoning rules, it is a "nonconforming" lot, building, or use and most rights to stay are preserved — but you generally cannot expand, move, or change the use, you must follow limits on repairs and rebuilding, and some uses may be subject to amortization or special time limits; see the Code definitions and rules in § 9.36.020, § 9.36.060–.080, and the amortization sections § 9.36.110–.150 for the exact controls.

Source References

• Garden Grove Municipal Code — Chapter 9.36, Nonconformities: § 9.36.010 through § 9.36.160 (definitions, continuance, permitted changes, reconstruction, amortization, violations).
• Garden Grove Zoning / Mixed‑Use tables (Table 9.18‑1 and related zone use rules): see Chapter 9.18 Use Regulations for mixed‑use zones and use tables for GGMU, CC, NMU, AR etc.
• Specific nonconforming references for service stations and reconstruction: § 9.36.060.C, § 9.36.080.
• Smoking lounges and other conditional uses: Chapter 9.18 subsections (e.g., § 9.18.030.330).
• City tables and development standards cross‑references (Chapters 9.08, 9.12, 9.18) for dimensional and use standards; consult those chapters for district‑level dimensional numbers.

Retrieved passages

• Garden Grove Zoning Code (§ 2) High relevance show source text
• Garden Grove Zoning Code (title shall) High relevance show source text
• CFC § 2 (§ 2) High relevance show source text
• Garden Grove Zoning Code (§ 2) High relevance show source text
• CFC § 2 (§ 2) High relevance show source text
• Garden Grove Zoning Code (§ 2) High relevance show source text
• Garden Grove Zoning Code (§ 2) High relevance show source text
• Garden Grove Zoning Code High relevance show source text
• Garden Grove Zoning Code (§ 9.36.150.) High relevance show source text
• CBC § 66314 (§ 66314) Medium relevance show source text
• CBC § 66321 (§ 66321) Medium relevance show source text
• Garden Grove Zoning Code (§ 66333) Medium relevance show source text
• Garden Grove Zoning Code (§ 66314) Medium relevance show source text
• Garden Grove Zoning Code (Section Applies.) Medium relevance show source text
• Garden Grove Zoning Code Medium relevance show source text

Cited sections

• Garden Grove Municipal Code — Chapter 9.36, Nonconformities: **§ 9.36.010** through **§ 9.36.160** (definitions, continuance, permitted changes, reconstruction, amortization, violations). (Chapter 9.36)
• Garden Grove Zoning / Mixed‑Use tables (Table 9.18‑1 and related zone use rules): see Chapter **9.18** Use Regulations for mixed‑use zones and use tables for **GGMU**, **CC**, **NMU**, **AR** etc.
• Specific nonconforming references for service stations and reconstruction: **§ 9.36.060.C**, **§ 9.36.080**. (§ 9.36.060.C)
• Smoking lounges and other conditional uses: Chapter **9.18** subsections (e.g., **§ 9.18.030.330**). (§ 9.18.030.330)
• City tables and development standards cross‑references (Chapters **9.08**, **9.12**, **9.18**) for dimensional and use standards; consult those chapters for district‑level dimensional numbers.
• GardenGrove_ZoningCode.md

• Official Garden Grove code library