Modesto | Zoning Districts

Modesto Zoning Districts: R-1, R-2, R-3, Mixed Use, Downtown and Planned Development Zones

A zoning district, or zone, is an area on the City map where the same building rules apply. Modesto keeps its zoning rules in Title 10 of the Municipal Code, read here in Supplement 72, whose history table lists ordinances through No. 3813-C.S. of May 12, 2026. This page explains each zone where homes are allowed, how many homes per acre each one allows, and which approvals each needs. The Modesto overview sums up the whole guide.

The Zones That Allow Homes

Section 10-1.401 creates the City's zones. Three are for homes: R-1 Low Density Residential, R-2 Medium Density Residential and R-3 Medium-High Density Residential. The list also names four commercial zones (P-O, C-1, C-2 and C-3), three industrial zones (C-M, M-1 and M-2), the Planned Development (P-D), Airport (A-P), Specific Plan (SP) and Specific Plan-Holding (SP-H) zones, and the Downtown Zones. Section 10-1.402 says the boundaries are those on the Zoning Map kept by the Community and Economic Development Department.

Land outside the city but inside its sphere of influence, the area Modesto expects to annex later, can be prezoned. Section 10-1.404 says prezoned land carries a "P" before the zone name on the map, and the "P" is removed when the land is annexed. A lot marked P-R-1, for example, will be R-1 once it joins the city.

Sources: Modesto Municipal Code Table 3.1-1, 10-3.217, Table 4.1-1, 10-4.104, 10-7.103, 10-7.402 and 10-7.413, 10-7.502, 10-7.604 and 10-7.704, Supplement 72.

How Modesto Counts Density

Density is the number of homes allowed for each acre of land. Modesto counts it per net acre: Section 10-2.117 defines net residential density as "the number of dwelling units per acre on a property, exclusive of public and private streets." An acre is 43,560 square feet, so a net acre is that much land after the streets are taken out.

Section 10-4.104 sets the numbers. R-1 has "a maximum density of 10.9 dwelling units per net acre." R-2 has a minimum of 10.9 and a maximum of 22. R-3 has a minimum of 22 and a maximum of 45. These ranges were set by Ordinance No. 3797-C.S. in 2025. Its findings say the density changes "provide consistency between the zoning ordinance and the General Plan." Before that ordinance, the section counted R-2 and R-3 density by square feet of lot area for sites under one acre.

Two examples, by VanPlex arithmetic. A 6,000 square foot R-2 lot is 0.138 of an acre, so 22 homes per acre gives 3.0 homes and the 10.9 minimum gives 1.5. A 6,000 square foot R-3 lot at 45 per acre gives 6.2 homes, and the 22 minimum gives 3.0. Title 10 has no rule on rounding a fraction of a home for density, so ask the Planning Division how it counts one before you size a project.

The minimums matter. Under Section 10-4.104(d), an R-2 or R-3 project must reach the minimum density unless the applicant shows, and the Director finds, one of two things. Either the existing lot "cannot accommodate a development of the minimum density due to configuration of existing buildings or shape or size of the lot," or a lower number will not hurt the City's ability to meet its share of the Regional Housing Needs Allocation, the state count of homes each city must plan for. If it would hurt, the applicant must rezone equal land or build covenanted affordable homes to make up the difference.

R-1: One House, or a Duplex on Any Lot

Section 10-4.101 says R-1 "is intended to accommodate lower-density residential development." It is the zone for most Modesto houses. The Housing Element, the City's state-required housing plan, estimates 38,000 parcels in it. Table 3.1-1 allows a single-family home, a manufactured home on a permanent foundation, and ADUs and junior ADUs in R-1. It bars multiple-family homes there.

The big change came in 2025. Section 10-3.217 now reads: "A duplex is allowed on any lot in the R-1 Zone subject to all other standards of the R-1 zone including but not limited to lot coverage, setbacks, height, parking, and fencing but not including density." Section 10-2.121(B) defines a duplex as "Two (2) primary single-family dwelling units on a single parcel that have separate entrances," and adds that it is not a multiple-family dwelling even when the two homes share walls. Before 2025 the code allowed a duplex in R-1 only on a corner lot, with each driveway on a different street.

A lot with a duplex can also have ADUs. Section 10-3.217(b) makes it "eligible for Accessory Dwelling Units as per Section 10-4.505 (a)," the same rule that applies to a house. The ADUs, duplexes and SB 9 page explains the limits.

R-2 and R-3: Houses and Apartments

R-2 is for "medium-density residential development" and R-3 for "relatively higher-density residential development," under Section 10-4.101. Both allow single-family homes and multiple-family homes by right. Section 10-4.101(a)(6) ties the two zones to the Housing Element: they provide "areas specifically for the purpose of medium and medium high density multi-family residential housing."

A project of five or more homes in R-2 or R-3 needs development plan review, a staff check of the site plan against the code and the City's design guidelines, under Section 10-9.1002(b)(3). The Director decides it without a public hearing. A building over one story in R-2 or R-3 next to an R-1 lot also needs that review. The three or more homes page covers both zones in depth.

The Mixed Use Corridors

Modesto added two mixed use zones in December 2023 to carry out its Housing Element. The City's Housing Element page describes "rezoning key commercial corridors along McHenry Avenue, Sisk Road, Oakdale Road, and Yosemite Boulevard." Both zones are for apartments on land that was commercial:

• MU-P, Mixed Use Pedestrian Oriented. Section 10-7.601 places it next to streets of "not more than two (2) travel lanes in each direction." Density is 22 to 45 homes per acre. A building may reach 8 stories or 90 feet where the lot does not touch a residential zone, and 3 stories or 45 feet where it does.
• MU-H, Mixed Use Highway Oriented. Section 10-7.701 places it next to streets of "more than two (2) travel lanes in each direction." Density is also 22 to 45 homes per acre. The height limit is 3 stories or 45 feet where the lot does not touch a residential zone; the MU-H table leaves the row for lots that do touch one blank.

Section 10-7.602 treats MU-P as equal to R-3 for homes, so R-3 rules fill any gap. Table 3.1-1 bars single-family homes in both zones. Each zone needs a commercial lot rezoned to MU-P or MU-H on the map, and only the Zoning Map shows which lots have been.

Downtown, Planned Development and Specific Plans

Downtown Zones. Article 5 of Chapter 7 is a form-based code, which sets the shape and placement of buildings first and their uses second. It covers six zones: Central (CD), Transition (TD), Urban General (UGD), Main Street (MSD), East Neighborhood (END) and Traditional Neighborhood (TND) Downtown. Section 10-7.502 says "All development requires Development Plan Review," and treats TND as equal to R-1 when other parts of Title 10 apply. Section 10-7.512 lists nine building types, from the Front Yard House to Stacked Flats, and includes a Du-Tri-Quadplex. The standards for each zone and building type are printed as images in the online code, so read them in the City's copy.

Planned Development (P-D). Section 10-7.101 says a P-D zone permits "variations from the density, height and other standards in the various zones where needed to accomplish unique development." Each P-D zone is adopted by ordinance with its own development plan and schedule, numbered on the map as P-D (1), P-D (2) and so on. Section 10-7.103 makes P-D the only zone for residential condominiums, community apartment projects and stock cooperatives. A builder who wants to sell each home of a fourplex as a condominium therefore needs a P-D zone and a tentative subdivision map.

Specific Plan (SP) and Specific Plan-Holding (SP-H). A specific plan is a detailed plan for one area that sets its own uses and standards. Section 10-7.303 says that once land is zoned SP, all development "shall comply with the uses, standards, and development review procedures of the adopted Specific Plan." The City's Specific Plans page links to plans for areas that include Village One, Woodglen, North Beyer and Pelandale Snyder. SP-H holds annexed farm land until a specific plan is in place: it allows one single-family home per lot, and Section 10-7.413 requires a new lot of "ten (10) acres."

Older Lots and Who Interprets the Map

Many lots in older Modesto neighborhoods are smaller than today's minimums. Section 10-3.504 says that lots recorded or on an approved tentative map on July 7, 1955 "shall be deemed to comply with applicable area and width requirements." A residential lot that does not meet the rules is "entitled to at least one (1) single-family dwelling," and more homes may be allowed under the zone's minimum density.

Where a boundary on the Zoning Map is unclear, Section 10-1.403 uses street center lines and property lines, and then the Director interprets the map. Under Section 10-1.501, the Director also decides what an unclear rule means, and may refer the question to the Planning Commission. Modesto is a charter city: its Charter took effect on January 14, 1963. The Planning Commission and the Board of Zoning Adjustment each have seven members appointed under Section 1102 of that Charter.

Where the Code Disagrees With Itself

• Mixed use zones missing from the zone list. Section 10-1.401 does not list MU-P or MU-H, while Table 3.1-1 and Articles 6 and 7 of Chapter 7 create and regulate them. The later articles control, since Ordinance Nos. 3772-C.S. and 3773-C.S. created the zones in 2023.
• ADU references to a repealed section. Table 3.1-1 and Section 10-3.201 send readers to Section 10-4.115 for ADUs. Ordinance No. 3762-C.S. repealed that section in 2023. The ADU rules in force are in Article 5 of Chapter 4, Sections 10-4.501 to 10-4.512.
• Effective date of the duplex rule. The code's history note gives Ordinance No. 3797-C.S. as "effective 6-24-25." The ordinance itself takes effect "thirty (30) days after its final passage," and each of its pages prints "EFFECTIVE DATE: July 24, 2025." The ordinance text controls: the R-1 duplex rule has applied since July 24, 2025.

Where to Go Next

Related on VanPlex: the Modesto overview, the duplex to fourplex guide and the lot eligibility checklist.

Frequently Asked Questions

Official sources (checked October 2026)