Colton Zoning, Planning & Building Codes

Last reviewed: July 1, 2026

Overview

Colton’s zoning and planning rules are codified in Title 18 — ZONING, which the City calls its Zoning Code and uses to implement the General Plan and state planning law § 18.01.010 . The Code divides the city into base zones and overlay/special-plan layers, sets property development standards in each zone (setbacks, heights, FARs, lot coverage), and establishes the city's review and permit procedures including administrative review, design review, and CEQA-based environmental review § 18.06.010 ; § 18.01.030 . This page explains where the rules live in the local ordinance, what the principal districts and standards are, how specific plans and overlays change rules on particular sites, how building permits and discretionary review are routed, and how statewide housing laws intersect with local rules.

How Colton's code is organized

• The municipal zoning ordinance is formally Title 18 — ZONING (the Zoning Code) § 18.01.010 . The Code states its purpose and ties all zoning decisions to the General Plan and state law § 18.01.020 .
• Key topical chapters to scan (and the best places to find particular rules):
  • Definitions and interpretation: Chapter 18.04 (definitions like “Accessory Structure,” “Yard,” “Nonconforming”) § 18.04.010 / § 18.04.468 .
  • Zoning districts, permitted uses, and zoning map rules: Chapter 18.06 (zone list, uses tables, official zoning map) § 18.06.010 / § 18.06.060 ; .
  • Zone-specific development standards: each zone chapter (for example R‑2 property standards § 18.14.050-1, M‑U/D downtown standards § 18.23.4.050-1) ; .
  • Parking & loading: Chapter 18.36 (general parking provisions and design) § 18.36.010–.020 .
  • Special provisions (ADUs, compact-lot rules, shelters, EV stations): Chapter 18.48 (special use rules and ADU material such as section 18.48.150) § 18.48.150 .
  • Specific plans and overlay zones: Chapter 18.34 (SP specific plan overlay) and Chapter 18.32 (PC planned community overlay) § 18.34.020; § 18.32.010 ; .
  • Review procedures and design review: Chapter 18.58 (Architectural and Site Plan Review; administrative thresholds such as § 18.58.030 are referenced throughout the zone chapters) § 18.58.030 .
  • Nonconforming rules and repairs: Chapter 18.46 (nonconforming uses, structures, lots) § 18.46.050 / § 18.46.030 ; .
  • Density bonus and incentives: Chapter 18.59 (implements state density bonus law locally) § 18.59.020 / § 18.59.040 .

(Practical help: open Chapter 18.06 first to identify a property's base zone and permitted-use table, then jump to the matching zone chapter for dimensional standards and any zone-specific design requirements § 18.06.010 .)

Zoning district families (what each set of zones is for)

Colton uses a compact list of base zones; the Code explicitly enumerates the zones the City uses: V‑L, R‑1, R‑2, R‑3, R‑4, C‑1, C‑2, C‑2/D (downtown overlay), M‑U/D (mixed‑use downtown), M‑U/N (mixed‑use neighborhood), I‑P, M‑1, M‑2, O‑S/R, O‑S/Res, P‑I, R‑U, plus overlay symbols such as SDA, R‑O, and SP (specific plan) § 18.06.010 .

• Residential family examples:
  • V‑L (very low), R‑1 (low, single‑family) and R‑2 (medium density duplex/low‑rise) regulate lot sizes, setbacks and the number/type of units; see § 18.12.010 and § 18.14.010 for intent and § 18.14.050-1 for R‑2 standards ; .
  • R‑3 / R‑4 are the multiple‑family zones intended for higher density multifamily and senior housing § 18.16.010 .
• Commercial/mixed‑use:
  • C‑1 (neighborhood commercial), C‑2 (general commercial) and C‑2/D (C‑2 with Downtown Overlay) regulate retail/office uses and downtown form — downtown has form-based controls (maximum front setback, plazas, max 2.0 FAR, max 3 stories / 40 ft) § 18.23.4.050-1 .
  • M‑U/D and M‑U/N promote mixed‑use infill and live/work where compatible; property development standards are in Chapter 18.23.1 § 18.23.1.010–.050 .
• Industrial/public/open space:
  • I‑P (Industrial Park), M‑1 (Light Industrial), M‑2 (Heavy Industrial) and P‑I (Public/Institutional) each have intent paragraphs and cross‑references to parking, landscaping and performance standards § 18.24.010; § 18.26.010; § 18.28.010; § 18.29.010 ; ; .
• Overlays and special zones:
  • PC planned community overlay (symbol PC) is an overlay to allow flexible, master‑planned development § 18.32.010 .
  • SP specific plan overlay (symbol SP) is used where a specific plan has been adopted; the Hub City Centre, Roquet Ranch, and Reche Canyon specific plans are adopted by reference and control standards inside their plan text § 18.34.020–.060 .

(For a quick scan of the base-zone list, see § 18.06.010 .)

Citywide development standards — where height/setbacks/FAR/coverage & parking live

• The Code uses a hybrid structure: general procedural chapters (definitions, uses tables, review rules), then zone chapters that contain the actual property development standards (lot size, setbacks, coverage, building‑height caps and FARs). Find the number tables inside each zone chapter (for example R‑2 property standards § 18.14.050-1; downtown C‑2/D Table § 18.23.4.050-1) ; .
• Typical examples you will encounter:
  • Downtown commercial intensity: 2.0 FAR and 3 stories / 40 ft maximum (commercial intensity and height are stated in Table 18.23.4.050‑1) § 18.23.4.050-1 .
  • Lot coverage rules and building projections (typical residential coverage example: 35% lot coverage appears in the multiple‑family chapter tables and projection rules) § 18.16.060; lot coverage table materials § 18.16.050-1 .
  • Landscaping minimums (example: 15% landscaping coverage required in some commercial/downtown contexts and one tree per parking ratio) § 18.23.4.090 .
  • Parking standards: citywide off‑street parking rules and stall design are in Chapter 18.36; downtown zone tables give use‑specific ratios (downtown retail example 1 space per 500 sf) § 18.36.010; § 18.23.070-1 ; .
• Administrative flexibility: the Director is authorized to approve limited minor deviations (small percentage adjustments to FAR, setbacks, parking, and sign area) and to handle administrative site‑plan review for smaller projects — see administrative powers and specific thresholds § 18.58.030 and the Director powers language (minor deviations and Director review thresholds) § 18.58.030 ; .

(If you are looking for a numeric standard for a particular lot, open the zone chapter for that base zone — the Code places the exact table in the relevant zone chapter, not in a single consolidated table.)

Specific plans & overlays — where they override or augment base rules

• Specific plan overlay (SP) is expressly an overlay only used when a specific plan is adopted; when an SP is effective the specific plan text and map govern and replace the underlying zone’s standards where the SP says so § 18.34.020–.030 .
• The Code lists adopted specific plans by name and incorporates their standards by reference: Hub City Centre Specific Plan, Roquet Ranch Specific Plan, and Reche Canyon Specific Plan are included as addenda and their development standards map into Title 18 § 18.34.040–.060 .
• Planned community overlay (PC) is used to permit creative master‑planned development with its own addendum standards; projects in PC require Commission design review except single‑family houses and minor additions § 18.32.010–.030 .
• Downtown overlay and the Colton Downtown Design Manual: Downtown has a companion Design Manual that developments must follow in addition to zone text § 18.23.4.130 .
• Sensitive or project‑specific overlays (SDA, R‑O, MCS, etc.) are enumerated in the zone list and applied on the Official Zoning Map § 18.06.010 .

(Practical rule: when a parcel is inside an SP or PC overlay, check the SP/PC text first — the Code requires the Director to apply the specific‑plan standards where adopted § 18.34.020 .)

Building permits & review — the path a project follows in Colton

• Pre‑application and environmental review: the Code requires environmental review (CEQA) for City approvals and ties project approvals to CEQA determinations; the Code’s purposes and procedures reference environmental review as part of approval flows § 18.01.030 (H) .
• Architectural & Site Plan Review (ASPR) is the primary discretionary design review vehicle:
  • ASPR is required for most new or expanded permanent structures over 500 sq ft and for many site developments; ASPR rules are enforced via Chapter 18.58 and related development plan review provisions § 18.35.1.060; Chapter 18.58 ; .
  • Smaller projects may be handled administratively: the Director may review and approve, conditionally approve, or deny ASPR for projects under stated thresholds (Director handles projects not exceeding certain sizes; Planning Commission handles larger projects) § 18.58.030 .
  • Many zone chapters (for example M‑U/D, C‑2/D, PC) explicitly require ASPR and point to Chapter 18.58 for decision criteria § 18.23.120; § 18.23.4.120; § 18.32.030 ; ; .
• Ministerial building permits: after entitlements and ASPR (if required) the project proceeds to building permits and must comply with the California Building Standards (Title 24) and local building/engineering conditions; Title 18 ties zoning decisions to state law and building code compliance § 18.01.020 .
• Conditional Use Permits (CUP), Minor Conditional Use Permits, and appeals: uses shown in the tables as conditional require a CUP; appeals of Planning Commission decisions can be taken to City Council per appeal and procedural rules referenced in Chapter 18.58 (appeal paths such as § 18.58.100 are referenced in multiple place‑specific rules) § 18.06.060; § 18.58.100 ; .
• Administrative flexibility: the Director may grant limited “minor deviations” (small percent changes in FAR, setbacks, parking, signage) without a variance process in specified situations § 18.58.030 .

(Working sequence: check the permitted/conditional table in § 18.06.060 first; if the use is permitted and meets zone standards, prepare building permit documents; if ASPR, CUP, or other discretionary approvals are needed, begin entitlement/ASPR and CEQA before building permit submission § 18.06.060; § 18.35.1.060 ; .)

State housing law in Colton — ADUs, density bonus, SB‑era rules, and limits

• Local code explicitly implements the state density bonus framework: Colton’s density bonus chapter implements the procedures and incentives required by Government Code § 65915; see local density bonus eligibility and incentives § 18.59.020 and the list of allowable incentives/concessions § 18.59.040 .
• Accessory dwelling units (ADUs / JADUs):
  • Colton has a local ADU section inside the special provisions chapter; the Code recognizes state ADU requirements, addresses fees, legalization of pre‑existing unpermitted ADUs, and allows discretionary treatment when an ADU does not meet the objective standards (conditional use) § 18.48.150; see the “Nonconforming Zoning Code Conditions, Building Code Violations, and Unpermitted Structures” ADU subsection § 18.48.150(h) .
  • The local ADU provisions point to and are implemented consistent with state ADU law (the City’s ordinance references Government Code and the State ADU framework) § 18.48.150 .
• SB 9 / lot‑splits / ministerial housing approvals: the City’s Title 18 materials in the retrieved file set do not include a transparent, labeled SB 9 implementation chapter in the excerpts we examined. Where state housing laws require ministerial approvals and objective standards, the Code’s general statement ties zoning to state planning law and the General Plan § 18.01.020; for specific SB 9 procedural rules you should check with Development Services or the City’s most recent code updates (not found in the retrieved excerpts) § 18.01.020 .
• Rent control / local rent limits: there is no rent‑control ordinance or rent‑stabilization chapter in the Title 18 materials we reviewed; state and local rent protections would appear in other Titles (not found in the Title 18 excerpts provided). Verify with the City clerk or municipal code site for Titles outside zoning (Not found in retrieved materials).

(Short form: Colton implements state density bonus and ADU rules in Title 18 § 18.59; § 18.48.150; for SB 9 and rent‑control status, the retrieved Title 18 excerpts do not show a dedicated local SB 9 implementation chapter or rent‑control chapter — verify with the City.) ; .

Practical orientation / tips for an applicant

• Identify the parcel’s zone on the Official Zoning Map and start at Chapter 18.06 to read the permitted/conditional‑use table § 18.06.010; then open the corresponding zone chapter for dimensional tables and form rules § 18.06.060 ; .
• If your project is in Downtown or a Specific Plan area, read the Downtown Design Manual or the relevant Specific Plan text because those materials control over default zone rules § 18.23.4.130; § 18.34.040 ; .
• Check whether Architectural & Site Plan Review is required (ASPR is required for structures/new permanent work over 500 sq ft and many developments) § 18.35.1.060 .
• For smaller, objective projects (and many ADUs), see whether the Director can process the application administratively under § 18.58.030 (administrative ASPR and minor deviations) .
• Confirm parking and stall dimensions early — Chapter 18.36 sets design and count rules; downtown tables add use‑specific ratios § 18.36.010; § 18.23.070-1 ; .

Information Gaps

• The uploaded Title 18 excerpts clearly show ADU policy (Chapter 18.48) and density bonus (Chapter 18.59), but an explicit SB 9 implementation chapter or a consolidated “ministerial housing approvals” section was not visible in the materials returned. For SB 9‑specific procedures (ministerial two‑unit or lot split approval), consult the City’s Development Services or the full municipal code online (verify with the jurisdiction) (Not found in retrieved materials) § 18.01.020 .
• If you need the precise numeric standard for a single parcel (exact setback, allowed height for a corner lot, or lot coverage in a zone subarea), consult the full zone chapter table for that zone in the City’s official code or contact Development Services — the code places the numeric tables inside each zone chapter (zone‑specific tables cited above) § 18.14.050-1; § 18.23.4.050-1 ; .

Source References

• Title 18 — ZONING (City of Colton Zoning Code): § 18.01.010, § 18.01.020, Chapter 18.01 (Title & Purposes) .
• Zone list and permitted use framework: § 18.06.010; § 18.06.060 (Uses Permitted in each Zone) ; .
• Downtown / C‑2/D development standards and Downtown Design Manual requirement: § 18.23.4.050-1; § 18.23.4.130 ; .
• Mixed‑use chapters (M‑U/D, M‑U/N) and M‑U development rules: § 18.23.1.010; § 18.23.120 .
• R‑2 property standards and residential chapter examples: § 18.14.010; § 18.14.050-1 .
• Parking and stall design: Chapter 18.36 (purpose and general parking provisions) § 18.36.010–.020; Downtown parking table § 18.23.070-1 ; .
• Architectural & Site Plan Review requirements and Director/Commission authorities: § 18.35.1.060; § 18.58.030 (administrative review threshold references) ; .
• Specific plans and overlays (Hub City Centre, Roquet Ranch, Reche Canyon): § 18.34.020–.060 .
• ADUs and special provisions (legalization, fees, discretionary treatment): § 18.48.150 (ADU subsection h) .
• Density bonus program implementing Government Code § 65915: Chapter 18.59 (eligibility and allowed incentives) § 18.59.020; § 18.59.040 .
• Nonconforming uses, repairs and extensions: Chapter 18.46 (Nonconforming Uses of Structures/Land/Lots) § 18.46.050; § 18.46.030 ; .