Fairfield — Overlay Districts

Last reviewed: July 2, 2026

Overview

Overlay districts in Fairfield are special zoning layers that modify or add rules to the city's base zoning in narrowly defined places (downtown, hillsides, North Cordelia, planned developments, etc.). These overlays are established only by rezoning and, except where the overlay says otherwise, the underlying base zone controls; if there is a conflict the overlay prevails. See § 25.28.1 and § 25.28.2 for the ordinance framework.

Important: overlay rules frequently point back to the city's base zoning tables and to city development standards; applicants must check both the overlay section and the referenced tables. Projects in overlays commonly trigger design review or other discretionary approvals. Where the overlay changes parking rules (for example downtown), consult the Downtown Parking rules and the city's parking rules together. Always remember building-permit work must separately meet the California Building Standards Code.

How this page is structured

Below is a district-by-district, Fairfield-specific breakdown. Each district subsection lists: purpose (what the overlay is aiming to do), typical permitted or newly-added uses, key dimensional / operational rules an applicant needs to know, and where the overlay applies or how it is shown on the Zoning Map. Every item below is grounded in the Fairfield Zoning Ordinance and cites the controlling §.

Downtown Area Parking Overlay — P1

• Purpose: allow downtown “deviations” from the standard parking requirements to reflect pedestrian scale, mixed uses and transit access. § 25.28.3.
• Typical / added rules:
  • Where a non-residential use would otherwise require 100 or fewer parking spaces under Section 25.34, an applicant may provide 50% of the required spaces instead (i.e., a 50% reduction). § 25.28.3(B)(1).
  • When a new use would require more than 100 spaces, the full parking requirement applies. § 25.28.3(B)(2).
  • The overlay allows in‑lieu fees and off‑site parking (off‑site parking is allowed within 300 feet). § 25.28.3(C), (G).
• Where it applies: commercial and mixed‑use parcels in the HDC, HD, and HO downtown base zones (these will be mapped as “P1” on the Zoning Map). § 25.28.3(A).
• Practical note: If you hope to reduce parking in downtown, file materials should reference both § 25.28.3 and Section 25.34 (Parking and Loading) and the Department keeps a record of any parking assessment credits. § 25.28.3(H).

Hillside Development Overlay — H

• Purpose: preserve scenic hillsides and natural features, control grading/erosion, and require projects to follow Hillside Management Guidelines. § 25.28.4(A).
• Permitted uses and rules: Uses remain those of the base zoning but development must comply with the base zone plus the City's Hillside Management Guidelines (established by City Council resolution). The overlay contains special review findings (e.g., preserve prominent natural features; development concentrated in lower elevations; minimize off‑site views). § 25.28.4(C)–(E).
• Key dimensional / procedural points:
  • The overlay is applied to sites with slopes around 5 to 10 percent or prominent hills as identified for review. § 25.28.4(B).
  • Where applicable, the Hillside Guidelines can change which base‑zone setbacks apply; the Director may adopt submittal rules and the Council may set a review fee to cover extra processing. § 25.28.4(C)–(F).
• Where it applies: mapped hillside parcels (verify the Zoning Map and related Hillside Management Guidelines). § 25.28.4(B).

North Cordelia Overlay — NC

• Purpose: originally to implement the Green Valley Settlement Agreement; revised in 2024 to expand allowable uses and design standards for office‑commercial properties south of Business Center Drive. § 25.28.5 (intro) & § 25.28.5 North Cordelia.
• Uses: the ordinance adds an expanded list of allowable uses for certain CO parcels (Table 25‑NC) — e.g., general retail, vocational school (with restrictions), athletic club, research & development, some light manufacturing and limited community uses; commercial cannabis uses are allowed with distance limits and notes. See Table 25‑NC and notes. § 25.28.5 (Table 25‑NC and Notes).
• Design and traffic controls:
  • All development must comply with North Cordelia Design Standards adopted by Resolution (Resolution 89‑384) — approval authority must find compliance. § 25.28.5(C).
  • Traffic caps for discretionary commercial >10,000 sq.ft. or that generate >150 daily trips are tied to LOS thresholds in the GVSA; the City will not approve such development if it causes LOS to fall below an agreed standard. § 25.28.5(D).
• Where it applies: properties north of I‑80 and west of Suisun Valley Road in Cordelia as mapped. § 25.28.5(B).

Gateway Court Overlay — GC

• Purpose: protect and support the restaurant cluster at Gateway Court and discourage incompatible uses. § 25.28.5A(A).
• Permitted uses: Restaurant, Table Service and Restaurant, Counter Service are explicitly permitted. Conditional uses (by CUP) include a long list (e.g., civic/community uses, specialty markets, banks, entertainment with food service). § 25.28.5A(C)–(D).
• Development standards: follow the CR base‑zone standards (Table 25‑10). § 25.28.5A(E).
• Where it applies: parcels directly south of Gateway Court near Gateway Blvd / Travis Blvd and west side of Maupin Court. § 25.28.5A(B).

Emergency Shelter Overlay — -ES

• Purpose: to make emergency shelters an as‑of‑right permitted use in specified industrial parcels (to meet state law and local shelter objectives). § 25.28.5B(A).
• Applicability: applies to properties in IL (Limited Industrial) that carry an IL‑ES designation; the Council can authorize temporary shelters in other zones during declared emergencies but such operations must follow these standards and cease after the emergency. § 25.28.5B(B).
• Permitted / operational standards (in addition to base zone development standards):
  • Homeless Shelter is a permitted use within the -ES overlay (definition in § 25.50). § 25.28.5B(C)(1).
  • Capacity limited to 250 residents per parcel and individual stays limited to six consecutive months. § 25.28.5B(D)(1)–(2).
  • Parking standard: 1 space per staff member and 1 space per 10 residents. § 25.28.5B(D)(4).
  • Management plan, on‑site management, and security requirements are also required. § 25.28.5B(D)(5).
• Practical note: shelters must comply with the underlying IL development standards (setbacks, loading, etc.) as well as these overlay operational rules. § 25.28.5B(D)(3).

Planned Development Overlay — PD

• Purpose and use: the PD overlay is a flexible, project‑level overlay to encourage creative design, coordinated large‑scale development, open space preservation and other objectives in a single master plan. § 25.28.6(A).
• How PD is established and shown: PD overlays are applied by rezoning (see § 25.47) and are shown with the suffix “PD” and a file number on the Zoning Map. § 25.28.6(B).
• Key thresholds and procedural requirements:
  • Five acre minimum gross developable land area to use the PD overlay. § 25.28.6(C).
  • Initiation of a PD rezoning requires a Planning Commission or City Council resolution at public hearing (special initiation rules). § 25.28.6(D).
  • Applications must include a Master Development Plan showing goals, circulation, base zoning, design elements, and any special regulations the PD will require; an approved Master Development Plan becomes an exhibit to the Zoning Map and directs future development. § 25.28.6(E).
  • Land uses generally follow the underlying base zone unless the Master Development Plan explicitly revises allowable uses and the PD findings are justified. § 25.28.6(F).
• Specific PDs: the ordinance includes many site‑specific PD rules (Section 25.28.7) for named PDs — e.g., Rancho Solano (max 1,200 dwellings), Garibaldi Ranch (max 673 dwellings), Green Valley Residential (lot, parking, setbacks and height standards), Waterman Ranch House, Stonedene, Western Business Park, and the Train Station Specific Plan -PD (with its own master standards and maximum dwelling unit allocations). See § 25.28.7 and the individual PD subsections for exact limits and deed/easement conditions.

Table — Quick reference to the most decision‑relevant overlay standards

District‑by‑district practical guidance (short)

• To use the PD overlay expect a rezoning hearing, a detailed Master Development Plan, and that many PDs carry project‑specific conditions (open‑space easements, unit maxima, required public tours for historic sites). § 25.28.6(E); § 25.28.7.
• For downtown projects relying on the P1 reduction, show parking calculations under Section 25.34 and document any assessment credits; the Department retains a credit record. § 25.28.3(B), (H).
• Hillside projects must follow the Hillside Management Guidelines; expect extra submittal requirements and findings that confirm preservation of ridgelines and lower‑slope development. § 25.28.4(C)–(E).
• Emergency shelters in -ES parcels must submit a Management Plan and meet the occupancy, stay‑length and parking formulas in the overlay; shelters still must meet base‑zone development rules. § 25.28.5B(D).

Checklist

• Verify the overlay shown on the City Zoning Map for the subject parcel (PD, P1, H, NC, GC, or IL‑ES). § 25.28.2.
• Determine the base zoning district and pull the base‑zone tables (e.g., Table 25‑3, 25‑4) referenced by the overlay. § 25.28.2.
• For PD proposals: prepare the Master Development Plan with required elements (goals, circulation, base zoning, special regulations). § 25.28.6(E).
• For downtown proposals: run parking calculations under Section 25.34 and apply P1 rules if eligible; document any existing assessment credits. § 25.28.3(B)–(H).
• For hillside sites: confirm slope mapping, follow Hillside Management Guidelines and be ready for additional studies (grading, drainage, erosion). § 25.28.4(C)–(D).
• For emergency shelter uses in -ES: prepare a Management Plan, meet occupancy/length/parking limits and operational requirements. § 25.28.5B(D).
• Check whether the project will trigger design review, Conditional Use Permit, Planned Unit Development Permit, or other discretionary approval; consult the relevant sections. § 25.28.6(F).
• Confirm building‑permit compliance with the California Building Standards Code and any overlay‑specific design standards or easements. Not a substitute for overlay requirements — see applicable PD or design standard citations above.

Risks & Ambiguities

Plain‑English Summary

Fairfield’s overlay districts are mapped additions to the base zoning that impose special rules for places with special needs — downtown parking rules (P1), hillside protections (H), a North Cordelia package of uses and traffic caps (NC), a small Gateway Court restaurant protection (GC), shelter rules for industrial parcels (-ES), and project‑level Planned Development (PD) overlays with detailed Master Plans. Each overlay points back to base zone tables and often to council‑adopted design guidelines; where the overlay and base conflict, the overlay rules win. See § 25.28.1–§ 25.28.7 for the controlling text.

Source References

• Fairfield Zoning Ordinance — Title 25, Article: Overlay Zoning Districts, § 25.28.1 – § 25.28.7 (general purpose, establishment, P1, H, NC, GC, -ES, PD and specific PDs). § 25.28.1, § 25.28.2, § 25.28.3, § 25.28.4, § 25.28.5, § 25.28.5A, § 25.28.5B, § 25.28.6, § 25.28.7.
• Downtown Parking (P1) detail: § 25.28.3.
• Hillside Management / H Overlay: § 25.28.4 (including Guidelines reference).
• North Cordelia (NC) details and Table 25‑NC: § 25.28.5 and Table 25‑NC.
• Gateway Court (GC): § 25.28.5A.
• Emergency Shelter (-ES): § 25.28.5B (uses, occupancy, parking, management).
• Planned Development (PD) rules and specific PDs (Rancho Solano, Garibaldi Ranch, Green Valley Residential, Train Station Specific Plan, et al.): § 25.28.6, § 25.28.7 and PD subsections.

Retrieved passages

• Fairfield Zoning Code (Section 25.47) High relevance show source text
• Fairfield Zoning Code (§ 2) High relevance show source text
• Fairfield Zoning Code (Article VIII) High relevance show source text
• Fairfield Zoning Code (SECTION 25.28) High relevance show source text
• Fairfield Zoning Code (Section Zoning) High relevance show source text
• Fairfield Zoning Code (Section 6.4.1) Medium relevance show source text
• Fairfield Zoning Code (Section 4.A.4) Medium relevance show source text
• Fairfield Zoning Code (section establishes) Medium relevance show source text
• Fairfield Zoning Code (Section 25.34) High relevance show source text
• Fairfield Zoning Code (§ 3) High relevance show source text
• Fairfield Zoning Code (§ 2.) High relevance show source text
• Fairfield Zoning Code (Section may) High relevance show source text
• Fairfield Zoning Code (Section 25.40.6.) High relevance show source text

Cited sections

• Fairfield Zoning Ordinance — Title 25, Article: Overlay Zoning Districts, **§ 25.28.1 – § 25.28.7** (general purpose, establishment, P1, H, NC, GC, -ES, PD and specific PDs). **§ 25.28.1**, **§ 25.28.2**, **§ 25.28.3**, **§ 25.28.4**, **§ 25.28.5**, **§ 25.28.5A**, **§ 25.28.5B**, **§ 25.28.6**, **§ 25.28.7**. (Title 25)
• Downtown Parking (P1) detail: **§ 25.28.3**. (§ 25.28.3)
• Hillside Management / H Overlay: **§ 25.28.4** (including Guidelines reference). (§ 25.28.4)
• North Cordelia (NC) details and Table 25‑NC: **§ 25.28.5** and Table 25‑NC. (§ 25.28.5)
• Gateway Court (GC): **§ 25.28.5A**. (§ 25.28.5A)
• Emergency Shelter (-ES): **§ 25.28.5B** (uses, occupancy, parking, management). (§ 25.28.5B)
• Planned Development (PD) rules and specific PDs (Rancho Solano, Garibaldi Ranch, Green Valley Residential, Train Station Specific Plan, et al.): **§ 25.28.6**, **§ 25.28.7** and PD subsections. (§ 25.28.6)
• Fairfield_ZoningCode.md

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