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Gridley — Development Standards

Development Standards under the Gridley local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes the Gridley Municipal Code rules on development standards (heights, setbacks/yards, lot coverage, density, parking expectations and related site controls) as they apply across the City’s zoning districts. It interprets the local Title 17 zoning chapters so you can compare districts quickly and prepare a project submittal. For district maps and use tables see Gridley Zoning. For design and site-level requirements you will also need to consult the City’s site-development and related chapters such as the parking rules and landscaping standards: parking, design review, overlay districts, ADUs, California Building Standards Code, signage, and landscaping and screening.

District-by-district standards (purpose, typical uses, key dimensional rules, where it applies)

Notes on citations: each rule below is grounded in the Gridley zoning code and cites the controlling code paragraph (the § number) together with the file excerpt returned from the uploaded ordinance text.

AR-5 (Agricultural Residential)

  • Purpose / typical uses: AR-5 provides large-lot agricultural/residential parcels; permitted uses include dwelling units and accessory agricultural structures. Minimum lot area: 5 acres (§ 17.12.040) .
  • Height: residential structures not to exceed 30 ft; agricultural support structures may be taller (no height limit specified for non-residential agricultural structures) (§ 17.12.050) .
  • Lot coverage: for principal agricultural uses 20%; for residential plus non-residential structures 40% (§ 17.12.070) .
  • Yards/setbacks: the general yard provisions of Chapter 17.78 apply (see district text) (§ 17.12.080) .
  • Where it applies: large-lot outskirts and portions of the Urban Reserve. Verify parcel-specific constraints with the City.

R-1 (Single-family Residential; includes R-1A/B/C subzones)

  • Purpose / typical uses: R-1 is conventional single-family residential. Subzones R-1A, R-1B, R-1C adjust minimum lot widths and lot coverage for smaller/larger lot patterns (§ 17.22.010–.060) .
  • Height: 30 ft maximum for main buildings; accessories 15 ft (§ 17.22.050) .
  • Lot width: R-1 typical lot width 60 ft (corner lots larger); R-1A/B and R-1C have their own minimums (§ 17.22.060) .
  • Lot coverage: R-1/R-1C = 40%; R-1A/R-1B = 60% (combined residential + accessory + paved) (§ 17.22.070) .
  • Yards/setbacks: the provisions of Chapter 17.78 apply for minimum yard requirements (code cross-reference) (§ 17.22.080) .

R-2 (Medium-density residential)

  • Purpose / typical uses: R-2 allows multi-unit or duplex/attached housing at medium densities (§ 17.25.010) .
  • Height: residential structures 30 ft max; accessory 15 ft (§ 17.25.050) .
  • Lot area & width: minimum interior lot 5,000 sq ft; corner lot 6,000 sq ft; width and corner-lot widths set in § 17.25.060 (§ 17.25.010–.060) .
  • Lot coverage: 40% combined (residential + accessory + paved) (§ 17.25.070) .
  • Yards/setbacks: Chapter 17.78 provisions apply (§ 17.25.080) .

R-3 (Multiple-family residential)

  • Purpose / typical uses: R-3 is targeted for multifamily development at roughly 9–15 du/acre as a buffer between lower-density areas and commercial or industrial (§ 17.26.010) .
  • Height: 30 ft for residential buildings; accessory 15 ft (§ 17.26.050) .
  • Lot width: minimum 80 ft (fronting residential street) and 100 ft for corner lots abutting a major arterial (§ 17.26.060) .
  • Lot coverage: 50% combined for buildings/accessory/paved areas (§ 17.26.070) .
  • Yards/setbacks: Chapter 17.78 rules applied; detailed yard numbers are controlled there (§ 17.26.080) .
  • Site controls: landscaping and site plan review are required; open areas must be landscaped (§ 17.26.125, § 17.26.120) .

R-4 (High-density residential)

  • Purpose / typical uses: R-4 accommodates 16–30 du/acre multifamily housing; denser apartment groups (§ 17.27.010–.020) .
  • Height: residential structures 40 ft max; non-residential accessory 15 ft (§ 17.27.050) .
  • Lot width: 80 ft frontage; corner lots 100 ft at arterials (§ 17.27.060) .
  • Lot coverage: 60% combined (§ 17.27.070) .
  • Yards/setbacks: Chapter 17.78 provisions apply (§ 17.27.080) .
  • Site controls: site development plan and landscaping required (§ 17.27.120–.125) .

C-1 (Downtown Commercial) and C-2 (General Commercial)

  • Purpose / typical uses: C-1 is downtown/commercial core; C-2 serves general retail, auto repair and durable goods (§ 17.32/.34) .
  • Height: commercial buildings 50 ft max; accessory buildings 15 ft (§ 17.32.060, § 17.34.060) .
  • Lot coverage: C-1 = 90%; C-2 = 90% combined coverage for structures and paved areas (§ 17.32.080, § 17.34.080) .
  • Yards/setbacks: generally none, except when abutting a residential district or State Highway (five-foot setback at State Highway frontage) (§ 17.32.070, § 17.34.070) .
  • Additional rules: site development plan review is required; parking standards defer to Chapter 17.76 (and special parking zones may apply in central Gridley) (§ 17.32.120, § 17.34.120) .

M-1 / M-2 (Light and Heavy Industrial)

  • Purpose / typical uses: M-1 light industrial uses; M-2 heavy industrial with more intensive manufacturing (§ 17.42, § 17.44) .
  • Height: M-1 / M-2 industrial buildings up to 65 ft; accessory buildings usually 20 ft (M-1/M-2 provisions vary; see the specific district §) (§ 17.42.050, § 17.44.050) .
  • Lot coverage: 80% aggregate coverage for M-1/M-2 (§ 17.42.070, § 17.44.070) .
  • Yards/setbacks: usually no front, side, rear yard requirements unless abutting an “R” district or State Highway (exceptions impose 5–25 ft buffers) (§ 17.42.060, § 17.44.060) .
  • Site controls: loading area minimums are specified (truck circulation and height needs) and landscape/site plan review is required (§ 17.42.090, § 17.44.090–.125) .

DMU (Downtown Mixed Use Combining Zone) and NMU (Neighborhood Mixed Use)

  • Purpose / typical uses: DMU and NMU are combining districts to encourage mixed-use (residential above commercial, live/work, parks/open space) and to concentrate activity in downtown/neighborhood centers (§ 17.53, § 17.54) .
  • Heights: DMU = 50 ft; NMU = 40 ft (§ 17.53.040.A, § 17.54.040.A) .
  • Lot coverage/density: DMU lot coverage = 100%; NMU = 90% (NMU) and density for stand-alone residential 10–30 du/ac, with no maximum when vertically mixed with commercial in both DMU and NMU (§ 17.53.040.B–C, § 17.54.040.B–C) .
  • Yards/setbacks: DMU often none; NMU yards follow R-3/R-4 yard rules (§ 17.53.040.E, § 17.54.040.E) .
  • Special notes: DMU/NMU encourage pedestrian streetscape, and many parking/lighting/signage details are modified (e.g., limited on-site parking, rear/side parking placement) (§ 17.53.040.D, § 17.54.040.D) .

PQP (Public & Quasi-Public), PD (Planned Development) and MUCZ (Mixed Use Combining)

  • PQP: specific public facility standards — 45 ft height unless use permit obtained; lot coverage caps of 60% with possible increases per Chapter 17.09 (§ 17.62.040–.050) .
  • PD: Planned Development districts allow the City to alter numeric standards (setbacks, heights, coverage, off-street parking, density) through a public hearing and PD plan; the underlying district generally controls unless modified (§ 17.55.040–.050) .
  • MUCZ: mixed-use combining district uses the underlying zone for dimensional standards but provides density bonus calculations and mixed-residential requirements (§ 17.52.060–.070) .

Quick-reference table — common decision-relevant numeric standards

District Max building height (primary) Max lot coverage Typical density Minimum yard/setbacks Code reference
R-1 30 ft 40% (R-1/R-1C) / 60% (R-1A/B) Low Chapter 17.78 applies § 17.22.050, § 17.22.070, § 17.22.080
R-2 30 ft 40% Medium Chapter 17.78 applies § 17.25.050–.070
R-3 30 ft 50% 9–15 du/ac Chapter 17.78 applies § 17.26.050–.070
R-4 40 ft 60% 16–30 du/ac Chapter 17.78 applies § 17.27.050–.070
C-1/C-2 50 ft 90% N/A Generally none; 5 ft on State Hwy § 17.32.060–.080; § 17.34.060–.080
M-1 / M-2 65 ft (industrial) 80% N/A None except buffer next to R § 17.42.050–.070; § 17.44.050–.070
DMU 50 ft 100% 10–30 du/ac (stand-alone) None § 17.53.040
NMU 40 ft 90% 10–30 du/ac (stand-alone) R-3 / R-4 yards § 17.54.040

Checklist (what an applicant must satisfy for a typical site project)

  • Confirm the parcel’s zone and any combining/overlay districts (e.g., DMU, NMU, MUCZ). Verify with the City planning map. (Code: underlying chapters and combining-zone sections; see § 17.52, § 17.53, § 17.54) .
  • Apply the district’s maximum height, lot coverage, and density limits (see table above; e.g., R-3 = 30 ft, 50% coverage) and document compliance (§ 17.26.050–.070) .
  • Demonstrate conforming lot width/area (district-specific minima) — lot widths are mandatory in R-1/R-2/R-3/R-4 (§ 17.22.060, § 17.25.060, § 17.26.060, § 17.27.060) .
  • Show required parking provision consistent with Chapter 17.76 and any special parking combining zone rules; for mixed-use downtown rules allow reduced on-site parking or rear/side parking placement (§ 17.53.040.D, § 17.54.040.D, § 17.32/.34) .
  • Submit a site development plan where required (most commercial, industrial, and multi-family projects — see Chapter 17.07) and include landscaping plans where mandated (§ 17.07 general reference; specific references: § 17.26.120; § 17.27.120; § 17.42.125) .
  • Address signage and enclosure of refuse per Chapter 17.72 (many districts include specific signage limits and refuse enclosure requirements) (§ 17.72 references, e.g., § 17.53.040.K–H) .
  • If requesting deviations (variances, PD modifications, density bonus), prepare findings and anticipate Public Hearing (see § 17.55 for PD modification and Chapter 17.08/17.06 procedures) (§ 17.55.050) .
  • For any residential units (including ADUs) confirm compliance with state ADU law and local ADU chapter — see Gridley ADUs and California ADU law. Verify building-safety compliance under the California Building Standards Code (Title 24). Link to those resources: ADUs; California ADU law; California Building Standards Code. (Internal guidance only; building code enforcement is separate) .

Risks & Ambiguities

Issue Why it matters What to verify
FAR (floor area ratio) FAR is commonly used for intensity but Gridley’s zoning excerpts contain no explicit FAR numbers for districts. Without FAR you must use lot coverage and height to estimate capacity. FAR: Not found in retrieved materials. Verify with Planning Department or full municipal code online.
Setback numerics delegated to Chapter 17.78 Many districts say “yard requirements per Chapter 17.78” but that chapter text was not reproduced in the retrieved excerpts; project setbacks may therefore be specific and parcel-dependent. Confirm exact front/side/rear yard dimensions in § 17.78 and check whether corner/arterial exceptions apply. Verify with City planner.
Density exceptions when vertical mixed-use Several districts state no maximum density when residential is vertically mixed with commercial (DMU/NMU). This can change allowable unit counts dramatically. Confirm how the City calculates density for vertically-mixed projects (gross vs net acreage; does on-site commercial floor area reduce permitted residential?) — see § 17.53.040.C, § 17.54.040.C .
Parking reductions & shared parking options Some mixed-use zones allow reduced on-site parking and shared parking agreements; local street parking is accepted in parts of downtown. Miscounted parking can derail approvals. Confirm required parking ratios in Chapter 17.76 and the City’s acceptance of on-street/shared parking for your parcel (see DMU/NMU provisions) .
Parcel-specific overlays / combining zones PD, MUCZ, DMU, NMU and other combining zones modify base rules; a parcel in a combining zone may be treated differently than the underlying zone. Confirm all overlay/combing zone designations on the parcel (zoning map) and read the combining-zone sections (e.g., § 17.52, § 17.53, § 17.54) .

Plain-English Summary

Gridley’s zoning code sets district-specific caps on building height, lot coverage, lot width/area and density (notably 30–40 ft for most housing districts, 50 ft in downtown DMU and 65 ft for some industrial buildings), and relies on common cross-chapters for detailed yard/setback rules, parking standards and site review. Many mixed-use zones allow higher intensity if units are stacked over commercial, and Planned Development overlay authority can change numeric limits — confirm every parcel’s overlays and verify yard/setback figures with Chapter 17.78 and the Planning Department. Key controlling code sections are cited throughout this page (see Source References).

Source References

  • Gridley Municipal Code — R-1 district: § 17.22.050–.080
  • Gridley Municipal Code — R-2 district: § 17.25.050–.070
  • Gridley Municipal Code — R-3 district: § 17.26.050–.125
  • Gridley Municipal Code — R-4 district: § 17.27.050–.125
  • Gridley Municipal Code — C-1 / C-2: § 17.32.060–.120; § 17.34.060–.125
  • Gridley Municipal Code — Industrial (M-1 / M-2): § 17.42.050–.125; § 17.44.050–.125
  • Gridley Municipal Code — Downtown Mixed Use (DMU): § 17.53.040
  • Gridley Municipal Code — Neighborhood Mixed Use (NMU): § 17.54.040
  • Gridley Municipal Code — Mixed-Use Combining (MUCZ): § 17.52
  • Gridley Municipal Code — Planned Development (PD): § 17.55.040–.050
  • Gridley Municipal Code — General definitions (lot area/coverage): § 17.04.126, .130
  • Gridley Municipal Code — General use and parking cross-references: Chapters 17.72 (general use/signs/refuse), 17.76 (parking), 17.78 (yards/setbacks), 17.07 (site development review) — referenced inside district chapters above (see individual district citations).

Information not found in the retrieved materials: explicit FAR figures for districts (FAR: Not found in retrieved materials). If FAR is necessary for your analysis, verify with the City.

Sources

Retrieved passages

  • Gridley Zoning Code (§ 18) High relevance
  • Gridley Zoning Code (§ 1) High relevance
  • Gridley Zoning Code (§ 1) High relevance
  • Gridley Zoning Code (§ 19) High relevance
  • Gridley Zoning Code (§ 23) High relevance
  • Gridley Zoning Code (§ 19) High relevance
  • Gridley Zoning Code (§ 15) High relevance
  • Gridley Zoning Code (§ 1) High relevance
  • Gridley Zoning Code (§ 9) High relevance
  • Gridley Zoning Code (§ 10) High relevance
  • Gridley Zoning Code (Section 17.72.060.) High relevance

Cited sections

Frequently asked questions

What can I build on an R-1 lot in Gridley?

In R-1 you can build single-family dwellings and accessory structures subject to R-1 rules: maximum building height 30 ft, accessory structures 15 ft, and lot coverage limits (typically 40% in R-1/R-1C or 60% in R-1A/R-1B) with yard rules per Chapter 17.78 (§ 17.22.050–.080) .

What are Gridley’s setback requirements?

Many district chapters defer to Chapter 17.78 for the detailed setback (yard) standards; individual districts reference that chapter (for example R-1 § 17.22.080, R-3 § 17.26.080, R-4 § 17.27.080). Consult § 17.78 directly or the Planning Department for the numeric front/side/rear yard distances (chapter text not reproduced in the retrieved excerpts) (§ 17.22.080; § 17.26.080; § 17.27.080) .

How tall can I build in downtown Gridley (DMU)?

In the DMU (Downtown Mixed Use) combining zone the allowable building height is 50 ft (no restriction on first-floor height in the DMU rules) (§ 17.53.040.A) .

What are Gridley’s lot coverage and density rules for multifamily housing?

Lot coverage and density are district-specific: e.g., R-3 allows 50% lot coverage and targets 9–15 du/acre; R-4 allows 60% coverage and targets 16–30 du/acre; DMU/NMU list stand-alone residential density 10–30 du/ac but may allow no maximum density when residential is vertically mixed with commercial (§ 17.26.070; § 17.27.070; § 17.53.040.C; § 17.54.040.C) .

Is there a Floor Area Ratio (FAR) in Gridley’s code?

No explicit FAR values appeared in the retrieved zoning excerpts. The code relies on lot coverage, height, and district density limits instead. FAR: Not found in retrieved materials. Verify with the City if FAR is used for any particular zone or project (planning staff may interpret intensity using other metrics) (Information gap) .

Do I need site development review or design review?

Yes — many districts require site development plan review (Chapter 17.07) for commercial, industrial and multi-family projects; DMU/NMU and most higher-density districts explicitly require site review and design coordination (§ 17.53.040.I; § 17.54.040.I; § 17.26.120; § 17.27.120) . For formal design-review procedures see Gridley Design Review.

Can I reduce parking requirements in a mixed-use downtown project?

The downtown and neighborhood mixed-use rules allow shared parking and use of on-street parking in some cases; many parking specifics are governed by Chapter 17.76, and DMU/NMU chapters permit shared or reduced parking with agreements and rear/side parking placement (§ 17.53.040.D; § 17.54.040.D). Always check Chapter 17.76 and the applicable combining-zone text for any exceptions or special parking-combining zones (§ 17.32/.34 references) .

If my lot abuts a residential district, what buffers apply?

Commercial and industrial district chapters frequently require yards or minimum side/rear setbacks where a parcel abuts an “R” district; the specific distances are in the district texts (for example C-1/C-2 have no yard requirements except where abutting an R district, then side/rear yards of 10–15 ft may apply; M-1/M-2 impose larger buffer yards of 20–25 ft where abutting R) — see the cited district rules (e.g., § 17.32.070, § 17.34.070, § 17.42.060, § 17.44.060) .

Are monument signs allowed in downtown Gridley?

Many mixed-use/downtown sections limit signage type and size; DMU/ NMU restrict monument signage in certain cases and specify signage area limits (e.g., building signage up to 25% of frontage or 100 sq ft maximum; DMU says no monument signage) — check the district signage callouts and Chapter 17.72 for full sign standards (§ 17.53.040.H; § 17.54.040.H; § 17.72 citations) . ---

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