Gridley Zoning, Planning & Building Codes

Last reviewed: July 3, 2026

Overview

Gridley’s land-use and zoning rules are codified in Title 17 (Zoning) of the Gridley Municipal Code; the Title organizes district regulations, combining/overlay zones, procedures and administrative chapters that steer everyday permitting and development review (see § 17.00.010, § 17.05.020) . The code splits content into (a) administration and entitlement procedures (Chapters 17.00–17.09), (b) the zoning map and district chapters (e.g., 17.21–17.62 for specific zones), and (c) citywide technical chapters covering parking, signs, landscaping and density bonus rules (e.g., 17.28, 17.72, 17.76) (§ 17.05.010–17.07.050; §§ 17.28.010–17.28.050; § 17.76.030) . This page summarizes how to read Title 17, the major district families used in Gridley, the citywide standards you’ll run into (setbacks, height, lot coverage, parking), where design and discretionary review live, important combining/overlay zones and how state housing laws appear in the local code (notably second‑dwelling/ADU and the local density‑bonus chapter) (§§ 17.07.020, 17.08.010, 17.82.010, 17.28.010) .

(First-time readers: if you want to jump straight to the zoning table or the permit checklist, start with the Gridley Zoning and Gridley Land Use pages linked below.)

How Gridley's code is organized

• Title and scope: Title 17 is the local Zoning Ordinance; administration, purpose and enforcement rules appear in the administration chapters (§ 17.00.010–17.00.050) . Link: Gridley Zoning
• Permit & entitlement structure: procedural chapters include pre-application/site development plan and fees (§ 17.07.010–17.07.050), amendments and rezones (§ 17.06.010–17.06.050), conditional use permits (§ 17.08.010), variances (§ 17.09.010), and general applicant responsibilities (§ 17.05.020) — those are the first pages to read for any new project (§ 17.05.020; §§ 17.06.020–17.06.050; § 17.07.050; § 17.08.010) . Link: Gridley Land Use
• District chapters vs. citywide chapters: most development rules live in the district chapters (for example the R and C chapters) while cross‑cutting technical rules (parking, signs, fences, landscaping, accessory structures, density bonus) live in separate chapters such as 17.72 (signs/fences), 17.76 (parking), 17.81 (accessory structures), and 17.28 (residential density bonus) (§ 17.72; § 17.76.030; § 17.81.020; § 17.28.010) . Link: Gridley Development Standards

Zoning district families (what the labels mean in Gridley)

Gridley uses traditional families plus several local mixed‑use and combining zones. Below are the city’s primary district families and the local chapter that controls each:

• Residential

  • R-S (Residential Suburban) — purpose: very low density single‑family; see § 17.21.010 .
  • R-1 / R-1A / R-1B / R-1C (Single‑Family) — single‑family districts and subzones; accessory uses and second‑dwelling/ADU references are in these chapters (§ 17.22.010–17.22.110) . Link: Gridley ADUs
  • R-2 (Medium‑Density Residential) — rules like minimum lot area, maximum height 30 ft, and lot coverage 40% are specified in § 17.25.040–17.25.070 (examples: max height 30 ft, lot coverage 40%) .
  • R-3 (Multiple‑Family) and R-4 (High‑Density Residential) — higher density rules including R‑4 maximum building height 40 ft, lot coverage 60% are in § 17.26 and § 17.27 respectively (§ 17.26.010; § 17.27.050–17.27.070) .

• Commercial

  • C-1 (Restricted Commercial) — downtown/commercial storefront standards and parking rules; see § 17.32.010–17.32.125 (e.g., lot coverage 90%, parking per Chapter 17.76) . Link: Gridley Parking
  • C-2 (General Commercial) — larger retail, automotive and service uses; max height 50 ft, yard exceptions along highway, coverage and parking references at § 17.34.010–17.34.120 (e.g. 50 ft height; lot coverage up to 90% for C‑2) .

• Industrial

  • M-1 (Limited Industrial) — light industrial uses, listed permitted uses and accessory rules are in § 17.42.010–17.42.125 (§ 17.42.010) .
  • M-2 / M-3 (Heavy / Agriculture Industrial) — M‑3 is explicitly titled Agriculture Industrial with maximum building height 65 ft (main buildings) and accessory limits in § 17.46.010–17.46.050 (§ 17.46.010; § 17.46.050) .

• Mixed‑use and special districts

  • DMU (Downtown Mixed Use) — downtown core, allows vertical mixing and very high lot coverage (DMU allows 100% lot coverage and up to 50 ft height); see § 17.53.010–17.53.040 (§ 17.53.040(A)–(C)) .
  • NMU (Neighborhood Mixed Use) — village/neighborhood centers; 40 ft height in many places and 90% lot coverage (see § 17.54.010–17.54.040) (§ 17.54.040(A)–(B)) .
  • MUCZ (Mixed Use Combining Zone) — mixing rules and a local density‑bonus cross reference (see § 17.52.010–17.52.060, which references Chapter 17.28 for density bonus) (§ 17.52.010–17.52.040) .
  • PQP (Public & Quasi‑Public) — public facilities and community service sites (§ 17.62.010) .

• Overlays / Combining zones

  • PD (Planned Development) — used as a combining zone to allow flexible standards; PD process, modification powers and approval actions are in § 17.55.010–17.55.140 (§ 17.55.030–17.55.130) . Link: Gridley Overlay Districts
  • AO (Agricultural Overlay) — secondary designation that limits uses to agricultural activities unless AO is removed; see § 17.56.010–17.56.090 (§ 17.56.030–17.56.050) .
  • SP (Special Parking Combining Zones) — downtown parking exceptions are in § 17.58.010–17.58.030 (Special Parking Zone No. 1 waives on‑site parking requirements for non‑residential downtown properties) (§ 17.58.020(B)) .
  • HCC (Highway Commercial Corridor / HCC MUCZ) — corridor/mixed‑use combining district with specific limits and development standards in § 17.59.010–17.59.050 (§ 17.59.050(A)–(D)) .

Citywide development standards — practical highlights

(See the district chapter for the full table that applies to your parcel; citywide rules further refine these.)

• Height: many residential districts cap primary building height at 30 ft (R-2 § 17.25.050) or 40 ft (R-4 § 17.27.050); commercial and mixed‑use often allow 40–50 ft (e.g., C‑2 § 17.34.060 allows 50 ft, DMU § 17.53.040(A) allows 50 ft) . Link: Gridley Development Standards
• Lot coverage / FAR proxies: Gridley generally expresses intensity as lot coverage and density (du/acre). Examples: R‑2 lot coverage 40% (§ 17.25.070); R‑4 lot coverage 60% (§ 17.27.070); C‑1/C‑2 lot coverage up to 90% (§ 17.32.080; § 17.34.080); DMU allows 100% lot coverage (§ 17.53.040(B)) .
• Setbacks / yards: many commercial districts have “no front yard required” but give exceptions where they abut residential zones or State Highway setbacks (see front/side/rear yard rules in § 17.32.070, and reference to Chapter 17.78 for yard rules) § 17.32.070; § 17.78.030) .
• Parking: off‑street parking is governed by a single technical chapter, Chapter 17.76; it contains counting rules (e.g., single‑family two spaces, apartments 1–1.5 spaces/unit depending on size, second/ADU units one space each) and rules for compact/on‑street/shared parking (§ 17.76.030; § 17.76.025) . Link: Gridley Parking
• Landscaping, loading, refuse and signage: district chapters repeatedly cross‑reference Chapter 17.72 for fences/signs and require landscape plans in site development review (example: industrial § 17.46.125; commercial §§ 17.32.125, 17.34.125) (§ 17.46.125; § 17.32.125; § 17.34.125) . Link: Gridley Landscaping and Screening and Gridley Signage

Design standards & discretionary review

• Site development plan review is the routine design/discretionary step across most non‑trivial projects; district chapters often say “Site development plan required” and point to Chapter 17.07 for procedure and fees (§ 17.32.120; § 17.34.120; § 17.46.110; § 17.07.050) . Link: Gridley Design Review
• Conditional uses and other discretionary entitlements are handled through Chapter 17.08 (standards the zoning administrator or Planning Commission can impose are listed at § 17.08.010) and appeals/Planning Commission/City Council roles are spelled out in the administration (e.g., § 17.00.030 for Planning Commission duties; § 17.55.100–17.55.130 for PD actions) (§ 17.08.010; § 17.00.030; §§ 17.55.100–17.55.130) .
• Design guidance: several districts require that “design standards shall meet or exceed the [City] Design Guidelines” and allow Planning Commission review of facades and historic fabric (see DMU § 17.53.040(I) and NMU § 17.54.040(I)) (§ 17.53.040(I); § 17.54.040(I)) .

Specific plans, combining zones and overlays you’ll see in practice

• Planned Development (PD): used to calibrate project‑specific standards and may modify setbacks, height, parking and coverage when the PD is approved; PD approvals carry specific site development plans and may expire if construction doesn’t start (§ 17.55.030–17.55.140) . Link: Gridley Overlay Districts
• MUCZ (Mixed Use Combining Zone) and MUCZ Areas: maps and area rules set mixed‑use densities and explicitly tie into the local density bonus chapter 17.28 (§ 17.52.010–17.52.050; see cross‑reference to Chapter 17.28) .
• Special Parking Combining Zones (SP No. 1 and No. 2): downtown/older neighborhoods have modified parking rules (SP No. 1 waives on‑site parking for downtown non‑residential uses, § 17.58.020(B)) (§ 17.58.020(B)) .
• Agricultural Overlay (AO): limits primary uses on affected parcels to agriculture uses unless the overlay is removed (§ 17.56.010–17.56.050; § 17.56.090 fee waiver) . Link: Gridley Historic Preservation

Building permits & the local permit path — practical checklist

• Start by checking the zoning for your parcel and the district chapter (e.g., R‑2 § 17.25, C‑2 § 17.34) to confirm permitted uses and dimensional standards (§ 17.25.010; § 17.34.020) . Link: Gridley Zoning
• Confirm whether your project needs a site development plan review, CUP, or is ministerial: many projects require site development review per district language (examples: § 17.32.120, § 17.34.120, § 17.46.110) and second dwelling (ADU) that meets code is ministerial per § 17.82.020(A) (§ 17.32.120; § 17.34.120; § 17.46.110; § 17.82.020(A)) . Link: Gridley ADUs
• Fill out the application and pay the fee as required (applicant responsibilities and fees are in § 17.05.020 and § 17.07.050) and expect the zoning administrator or Planning Commission to sign a Zoning Compliance certificate before the building permit can be issued (§ 17.05.020; § 17.07.050; § 17.00.050) .
• Building‑code compliance: building permits and construction are subject to the adopted California building codes; Title 17 explicitly requires work to comply with the currently adopted California codes for trades and building safety (§ 17.81.020) — for trade work you must follow the California Building Standards Code (Title 24) and obtain the applicable permits (§ 17.81.020) . Link: California Building Standards Code
• Appeals and modifications: variances are in Chapter 17.09, and appeals of administrative decisions go to the Planning Commission; larger PD and rezones follow Planning Commission recommendation to City Council (see §§ 17.09.010; 17.55.100–17.55.120; 17.06.030–17.06.050) (§ 17.09.010; §§ 17.55.100–17.55.120; §§ 17.06.030–17.06.050) . Link: Gridley Variances and Exceptions

State housing law in Gridley — local implementation notes

• Accessory dwelling / second dwelling: Gridley implements state ADU/second‑unit law via a local chapter titled Chapter 17.82 — Second Dwelling Units. The chapter states its intent under Government Code §§ 65852.1 and 65852.2 and provides ministerial approval where the unit meets code; maximum living area for detached second dwellings is 1,200 sq ft and second dwelling units are not counted toward density (§ 17.82.010–17.82.030; § 17.82.020(B)–(C)) . Link: California ADU law
• Density bonus: Gridley has a local Residential Density Bonus chapter, Chapter 17.28, which implements Government Code §§ 65915–65918 and contains specific eligibility, calculation tables and procedures (e.g., maximum 35% bonus, application and affordable housing agreement requirements) (§ 17.28.010; § 17.28.050; § 17.28.110) .
• SB 9 / lot‑split and ministerial housing laws: I did not find a local SB 9 (ministerial lot split/two‑unit) implementation section in the retrieved Title 17 excerpts; Gridley’s code does make many references to state law when implementing ADUs and density bonus, but specific SB 9 language or explicit ministerial duplex/lot‑split procedures were Not found in the retrieved materials — verify with the Planning Department for any post‑2016 amendments or implementing ordinances (Not found in retrieved materials) . Link: California housing laws

Information Gaps / What to confirm with the City

• Local implementation of SB 9 (ministerial lot splits / duplex by‑right) does not appear in the retrieved Title 17 excerpts; confirm current practice with the Planning Department (Not found in retrieved materials) .
• Recent ordinance changes after 2017 (and any late amendments like 2023 changes to R‑1 subzones) may modify subzone standards — always check the City Clerk or online codified version for the most recent amendments (§ 17.22 amendments cited Ord. 845‑2023) .
• For project‑specific interpretations (setbacks on pie‑shaped lots, nonconforming use questions, or parking waivers), use the zoning administrator and the site development pre‑application step per § 17.55.060 and § 17.05.020 (§ 17.55.060; § 17.05.020) .

Source References

• Gridley Municipal Code — Title 17 (Zoning), multiple chapters referenced above (e.g., Ch. 17.00, 17.05, 17.07, 17.08, 17.21–17.62, 17.72, 17.76, 17.82, 17.28) — see the code excerpts and chapter headers used throughout this overview (§ 17.00.010; § 17.05.020; § 17.07.050; § 17.08.010; § 17.21.010; § 17.22.010; § 17.25.010; § 17.32.010; § 17.34.010; § 17.42.010; § 17.46.010; § 17.53.010; § 17.54.010; § 17.55.010; § 17.56.010; § 17.58.010; § 17.59.010; § 17.76.030; § 17.82.010) .