Modesto Zoning, Planning & Building Codes

Last reviewed: July 3, 2026

Overview

Modesto’s zoning and planning rules are contained in the City’s municipal zoning ordinance (published in the municipal code as Title 10) and organize allowable uses, development standards, and the permit/review paths used by the Community and Economic Development Department. The code creates conventional residential, commercial, industrial and special zones (and a Downtown form‑based code), sets citywide standards for setbacks, height, lot coverage and parking, and implements state housing laws (including ADU rules and the State density bonus). See the City’s zoning map and the code to identify the zone that applies to a parcel; the code’s table and article references show the controlling development standards and procedures (for example, § 10-1.401, § 10-4.102, § 10-9.1001) .

How Modesto's code is organized

• The zoning regulations appear in Title 10 of the Modesto Municipal Code. The code names the zones and sets zone boundaries (the Zoning Map is incorporated by reference) § 10-1.401; map interpretation rules and prezoning rules are also in the same chapter § 10-1.402–10-1.404 .
• Development standards (setbacks, height, lot coverage, landscaping) are collected in Chapter 4 (Tables and accompanying rules such as Table 4.1-1 for residential standards) § 10-4.102 and related sections § 10-4.106–10-4.114 .
• Special-area and form‑based rules for Downtown are in Chapter 7 (Downtown Zones, Article 5) and Specific Plan zones are in Chapter 7 Article 3 (the SP and SP‑H zones) § 10-7.301–10-7.305 .
• Review, permit and discretionary procedures (development plan review, conditional use permits, variances, amendments) are in Chapter 9; the development‑plan review purpose and applicability are stated at § 10-9.1001–10-9.1002 .
• Housing and incentive provisions such as the local density‑bonus chapter are in Chapter 10-8 (density bonus governed by Government Code § 65915) § 10-8.103 .

(When reading the code: look up the relevant table (e.g., Table 4.1-1, Table 4.2-1) for the zone, then read the following subsections for zone‑specific exceptions and the procedural chapters for review steps.) Link: the city’s published tables collect the district rules; see the code table references above § 10-4.102 .

Zoning district families

Modesto’s zoning creates the following district families and labels in the code (the table below lists the label and the code citation where those districts are established):

• Residential: R-1 (Low Density), R-2 (Medium Density), R-3 (Medium‑High Density) — established in § 10-1.401 and with residential standards in Table 4.1-1 / § 10-4.102 .
• Commercial / Office: P-O (Professional Office), C-1 (Neighborhood Commercial), C-2 (General Commercial), C-3 (Highway Commercial) — intents and standards collected in § 10-4.202 and Table 4.2-1 § 10-4.202 .
• Industrial / Commercial‑Industrial: C‑M, M-1, M-2 — purpose and industrial standards in § 10-4.301–10-4.304 and Table 4.3-1 .
• Planned/Specific: P‑D (Planned Development), SP (Specific Plan) and SP‑H (Specific Plan‑Holding) — Specific Plan purposes and effect are in § 10-7.301–10-7.305; the SP‑H zone rules and allowed interim uses are in § 10-7.401–10-7.402 .
• Downtown/form-based: Downtown is regulated through six form‑based Downtown Zones (form-based code in Chapter 7 Article 5 and definitions in § 10-7.501 and § 10-7.516) — the Downtown code is a form‑based overlay of zones and has its own tables and exceptions § 10-7.501 and § 10-7.516 .

For a parcel you must check the Zoning Map (as incorporated) and the specific Table for its zone: the names and labels are set out at § 10-1.401 .

Citywide development standards (high‑level orientation)

• Where to find the numbers: residential standards are assembled in Table 4.1-1 and explained in § 10-4.102–10-4.114; commercial standards are in Table 4.2-1 / § 10-4.202; industrial in Table 4.3-1 / § 10-4.301–10-4.304 .
• Typical rules you will see in the tables and supporting text: minimum lot area and width (e.g., R-1 interior lots minimum 5,000 sq ft, R-2 and R-3 differ) and lot‑coverage caps (e.g., R-1 interior lot coverage 50%) — see Table 4.1-1 / § 10-4.102 for the exact numbers that apply to your lot .
• Setbacks: front, street‑side, interior side and rear setbacks are set in the residential table and by subsections § 10-4.106–10-4.108; for example, minimum front/ street‑side building setbacks in residential zones are 15 ft for the main building per Table 4.1-1 § 10-4.106 and side‑setback rules for second stories are described at § 10-4.107 .
• Height: maximum stories/feet depend on zone and adjacency to residential zones—see each table (commercial examples in Table 4.2‑1 show typical max heights such as 2 stories / 35 ft in PO and 8 stories / 90 ft in some C‑2 cases with CUP) and the general height exceptions at § 10-4.401 .
• Lot coverage and FAR: the residential table lists coverage caps (e.g., R-1 50% interior lot); specific FAR references are in the development‑standards tables and accompanying definitions § 10-4.102 .
• Parking: parking requirements are collected in Chapter 5 (the development tables repeatedly point to Chapter 5 for off‑street parking requirements — see the commercial and residential tables referencing "See Chapter 5") — consult Chapter 5 for use‑specific spaces and accessible/loading standards § 10-4.202 / Table references . Link: see the city’s guidance on parking (/us/california/modesto/parking).

Note: many of the table cells include “Adjacent to Residential Zone” rules — adjacency matters and triggers larger setbacks, lower allowed heights, or design review triggers; see the adjacent‑to‑residential notes in the tables and § 10-4.203 for side/rear setback transitions .

Design, discretionary review and administrative review

• Design Guidelines are applied across multiple reviews: the Director, Board or Commission must apply the adopted Design Guidelines when considering building permits, administrative approvals, development plan review, conditional use permits and similar applications § 10-1.505 and § 10-4.113–10-4.205 . Link: see the city’s design review resource (/us/california/modesto/design-review).
• Development Plan Review: many projects require Development Plan Review (ministerial or discretionary depending on triggers). The code states the purpose and applicability of development plan review in § 10-9.1001–10-9.1002 and lists which zones and project types are subject to it § 10-9.1002 (e.g., all P‑O, C‑1, C‑2, C‑3, C‑M, M‑1, M‑2 projects not already requiring a CUP; multi‑family projects of five or more units in R‑2/R‑3; all projects exceeding one story next to R‑1; etc.) .
• Conditional Use Permits, Variances and Appeals: those procedures are in Chapter 9 (the code provides initiation, required findings and appeal processes; many Director or Board determinations can be appealed to the Council) § 10-9.802–10-9.903 and related articles . Link: see the city’s variances and exceptions page (/us/california/modesto/variances-and-exceptions).
• Downtown form‑based code: Downtown uses a form‑based code where the "form" controls building placement, frontage and build‑to lines; Downtown has its own definitions and exceptions in § 10-7.501 et seq. and § 10-7.516 .

Specific plans & overlays

• Specific Plans (SP): The SP zone implements adopted Specific Plans and once applied, a property follows the specific plan’s uses, standards and review steps § 10-7.301–10-7.305 (Specific Plan format, adoption and effect are governed by State law — Gov. Code § 65450 et seq.) .
• Specific Plan‑Holding (SP‑H): applied to areas transitioning from agricultural to urban use with limited interim uses allowed (single‑family dwelling, certain agricultural uses and limited lodging); see § 10-7.401–10-7.402 for interim permitted uses in SP‑H .
• Downtown form‑based overlay: Downtown Zones are a separate Article with form‑based standards (build‑to lines, frontage requirements, frontage types, upper‑story rules) in Chapter 7 Article 5 § 10-7.501 et seq.; the Downtown code also contains historic‑zone transition rules and exceptions § 10-7.503 and related provisions .
• Other overlays such as airport (A‑P) and special overlay districts and the Downtown Historic Designation are referenced in the code (see zone list § 10-1.401 and the Downtown definitions § 10-7.516) . Link: also review the overlay districts page for applied overlays (/us/california/modesto/overlay-districts) and historic preservation (/us/california/modesto/historic-preservation).

Building permits & review — practical path

• Preliminary step: identify the parcel’s zone (Zoning Map) and then read the applicable Table 4.x for base development standards; see § 10-1.401 and § 10-4.102 .
• Minor / ministerial projects: many building permits that only require code‑compliance are issued by the Building Division, but they must conform to Title 10; enforcement and permit conformity rules are in § 10-1.502 (all permits must conform to this Title) .
• ADUs and JADUs are processed ministerially under the ADU article and the City must approve or deny a complete ADU application within 60 days; see § 10-4.503(a) for the ministerial ADU time frame and review rules . Link: for ADU rules see the city’s ADU page (/us/california/modesto/adu).
• Development Plan Review / discretionary: where Development Plan Review or a Conditional Use Permit is required (see § 10-9.1002), the project follows the Chapter 9 procedures (Director/Board/Commission review, public noticing, appeals) § 10-9.1001–10-9.1002 .
• Appeals: Board/Commission decisions may be appealed to City Council per the appeals rules in Chapter 1 (e.g., § 10-1.205, § 10-1.305) .
• Building code interface: the local building official enforces the California Building Standards (Title 24); the zoning code defers to the building code for vertical exceptions and equipment enclosures § 10-4.401 and discusses occupancy and Group R issues for ADUs § 10-4.501(e) . Link: California Building Standards Code (/us/california/building-codes).

State housing law in Modesto — how it integrates locally

• ADUs/JADUs: Modesto’s ADU article implements state ADU law and establishes ministerial approval timelines, types allowed (attached, detached, converted, JADU), size limits and parking/fee rules — see § 10-4.501 (purpose), § 10-4.503 (ministerial approval/timeframe), § 10-4.504–10-4.506 (types, number and maximum sizes) and accompanying rules about utility fees and lot‑coverage exceptions for small ADUs § 10-4.501–10-4.506 . Link: see the state ADU law reference at California ADU law (/us/california/california-adu-laws) and Modesto’s ADU resource (/us/california/modesto/adu).
• SB 9 / two‑unit/lot‑split context: the ADU article notes that the ADU regulations "may be applicable" to lots developed under Senate Bill 9 (SB 9) § 10-4.501(f) — SB9 compliance and lot‑split rules should be checked with the City, but Modesto explicitly references SB 9 in the ADU article § 10-4.501(f) . Link: California housing laws (/us/california/housing-laws).
• Density bonus: Modesto has a local density bonus chapter that explicitly follows California Government Code § 65915; the local rules and definitions for density bonus are in Chapter 10-8 § 10-8.103 and the definitions for the local density bonus program are in Article 2 of that chapter § 10-8.201 et seq. .
• Parking & impact limits for ADUs: Modesto implements ADU fee and parking limits consistent with state law (e.g., no impact fee for ADU < 750 sq ft; lot‑coverage exceptions for ADUs ≤ 800 sq ft) — see § 10-4.501 and § 10-4.506 for the specific ADU fee and lot‑coverage provisions and parking exemptions .
• Rent control and local rent restrictions: no rent control program text was found in the retrieved zoning excerpts; rent regulation is not a zoning function and is typically adopted separately — Not found in retrieved materials; verify with the City or municipal code searchable online.

Information gaps / items to verify with City records

• Chapter 5 (detailed parking ratios and accessible/loading standards) is referenced in the tables as "See Chapter 5" but the detailed Chapter 5 text was not included in the excerpts returned here — consult Chapter 5 for exact vehicle parking counts and accessible parking rules (tables point you there) (Table references in § 10-4.102 and § 10-4.202) .
• Full nonconforming use and amortization rules: general limits and enforcement appear (permits must conform to Title 10 § 10-1.502), but a dedicated nonconforming‑use article location and text were not returned in full — check the municipal code’s “Nonconforming Uses” article for full rules (some references are in the ADU and enforcement articles) . Link: see Modesto Nonconforming Uses (/us/california/modesto/nonconforming-uses).
• Local administrative forms, fees, checklists and design guidelines (referenced repeatedly) are adopted by resolution or the Director and are not reproduced here — confirm current fee schedule and design guideline documents with the Community and Economic Development Department § 10-1.505(b), § 10-9.1001 .

Source References

• Modesto Municipal Code — Zoning (Title 10): names of zones and zone map rules § 10-1.401–10-1.404 .
• Residential development standards and Table 4.1-1; front/side/rear setbacks § 10-4.102; § 10-4.106–10-4.114 .
• Commercial development standards and Table 4.2-1 § 10-4.202 (references to Chapter 5 for parking) .
• Specific Plan zone (SP) purpose and application § 10-7.301–10-7.305 .
• Specific Plan‑Holding (SP‑H) permitted interim uses § 10-7.401–10-7.402 .
• Development Plan Review purpose and applicability § 10-9.1001–10-9.1002 .
• ADU article — purpose, ministerial approval, types, sizes, parking and fee rules § 10-4.501–10-4.506 .
• Density bonus local chapter referencing Government Code § 65915 § 10-8.103 .
• Downtown form‑based code purpose and definitions § 10-7.501; § 10-7.516 .