Modesto | Three or More Homes

Modesto Three or More Homes: R-2, R-3, Mixed Use Corridors, Downtown and the Density Bonus

A triplex, fourplex or small apartment building is a multiple-family dwelling in Modesto, which Section 10-2.122 defines as "A building designed for and/or occupied by two (2) or more families." An R-1 lot can hold a duplex and ADUs, but a building of three or more homes needs a zone that permits multiple-family homes. This page covers those zones, their density floors and caps, the reviews they trigger, the parking they need, and the state density bonus as Modesto applies it. The Modesto overview sums up the whole guide.

Where Three or More Homes Are Allowed

Table 3.1-1 lists "Multiple Family" as permitted ("P") in R-2, R-3, MU-P and MU-H; as conditional ("C") in P-O, C-1, C-2 and C-3; and as barred in R-1 and the industrial zones. A conditional use permit is an approval the Board of Zoning Adjustment may grant after a public hearing if it finds the use fits the area. The table's note adds that ADUs and junior ADUs "are allowed in conjunction with multiple family development on commercial properties for which a CUP has been issued." A note under the commercial standards in Section 10-4.202 adds: "Multi-family development allowed with a conditional use permit shall comply with R-2 or R-3 development standards."

Sources: Modesto Municipal Code Table 3.1-1, Table 4.1-1, 10-4.104, 10-7.502, 10-7.604, 10-7.704, Table 9.1-1 and 10-9.1002, Supplement 72.

R-2 and R-3: Floors and Caps on Density

Section 10-4.104 sets both a floor and a cap. R-2 has "a minimum density of 10.9 dwelling units per net acre, and a maximum density of twenty-two (22) dwelling units per net acre." R-3 has "a minimum density of 22 units per net acre, and a maximum density of forty-five (45)." A net acre leaves out streets.

By VanPlex arithmetic, a fourplex needs at least 7,920 square feet of net land in R-2 (four homes divided by 22 per acre, times 43,560 square feet), and fits on any R-3 lot of the 6,000 square foot minimum, where the cap is 6.2 homes. On an 8,000 square foot R-2 lot the cap is 4.0 homes and the floor is 2.0, so a duplex or triplex there meets both. Title 10 has no rounding rule for density, so confirm how the Planning Division counts a fraction.

The floor binds. Under Section 10-4.104(d), R-2 and R-3 projects must meet the minimum unless the Director finds the lot cannot hold it "due to configuration of existing buildings or shape or size of the lot," or that a lower density will not hurt the City's ability to house its share of very low and low income households. If it would, the applicant must rezone an equal parcel to the same density or "construct and covenant for affordable units" so there is "no net loss of units."

When homes are added to a lot that already has one, Section 10-4.112 requires the existing home to "comply with the Building and Maintenance code prior to occupancy of the additional dwelling(s)." An ADU or junior ADU is exempt from that rule.

Review, Height and Neighbor Rules

Section 10-9.1002(b) requires development plan review, a check by the Director of the site plan, buildings and design, for "five (5) or more units" in R-2 and R-3, and for every project over one story in R-1, R-2 or R-3 next to the R-1 zone. The Director gives written notice of the decision, which becomes final 15 days later unless someone appeals to the Planning Commission. Projects that need a mitigated negative declaration or environmental impact report go to the Planning Commission or City Council instead (Section 10-9.1005(d)).

Height limits are 2 stories or 30 feet in R-2 and 3 stories or 42 feet in R-3, "whichever is less." Section 10-4.109(b) checks any R-2 or R-3 project with a second story against the City's Multi-Family Residential Design Guidelines and Neighborhood Compatibility Guidelines. Next to R-1, Table 4.1-1 widens the side setback to 15 feet for a two-story part and 20 feet for a three-story part, and the rear setback to 20 feet for a three-story part.

Section 10-4.406 requires a 6 foot solid decorative masonry wall where a "Multi-family Development with fifteen (15) or more dwelling units" sits next to the R-1 zone. Below that size, the normal 8 foot limit on fences applies, with 42 inches in front yards.

Parking for Apartments

Table 5.1-1 sets multiple-family parking by bedrooms: 1 space per studio, 1 per one-bedroom home and 2 per home of two or more bedrooms. "Lots with 5 or more units shall provide 1 guest parking space per 4 units." Under Section 10-5.103, a fraction of one-half or more counts as a full space.

• Fourplex, two bedrooms each. 4 x 2 = 8 spaces, no guest spaces.
• Fourplex, one bedroom each. 4 x 1 = 4 spaces.
• Eight homes, two bedrooms each. 16 spaces plus 8 / 4 = 2 guest spaces, 18 in all.

These counts are VanPlex arithmetic on the table. For "Residential Development, four (4) or fewer units," Section 10-5.105 requires each open space to be "ten (10) feet wide and nineteen (19) feet long." The same section lets parking for "single-family houses, duplexes or triplexes" back out onto the street; a larger project needs room to turn on site. State law can lower these numbers: Government Code 65863.2 bars minimum parking for a project "within one-half mile of public transit," and a city may make findings to keep it only for projects of 20 or more homes. The state rule applies in Modesto directly; Title 10 has no section on it.

Mixed Use Corridors and Downtown

The Housing Element page explains that the City created "two new Mixed-Use Zones" and rezoned "key commercial corridors along McHenry Avenue, Sisk Road, Oakdale Road, and Yosemite Boulevard." Both zones require 22 to 45 homes per acre. MU-P allows "8 stories/90-feet" where the lot does not touch a residential zone and "3 stories/45-feet" where it does. MU-H allows "3 stories/45 feet" where the lot does not touch a residential zone, and its table gives no figure for lots that do. Section 10-7.605 requires a building next to a low-density lot to have no windows facing its yard, or sills at least five feet eight inches above the floor, and "No balconies shall face the low-density residentially zoned parcel." Single-family homes are barred in both zones.

Downtown's form-based code in Article 5 of Chapter 7 regulates by building type. Section 10-7.512 lists nine, including the "Du-Tri-Quadplex," "Bungalow Court," "Row House," "Mansion Apartment" and "Stacked Flats." Each Downtown Zone permits only certain types, and the online code prints those standards as images. Section 10-7.515 lets required parking sit off site "within one thousand four hundred sixty (1,460) feet of the building it serves" on a long-term lease approved by the Director, and allows shared parking between uses. Section 10-5.101(b) says a "reconstruction or change in use shall not result in the requirement for additional parking in the Downtown Area."

The Density Bonus in Modesto

A density bonus lets a project build more homes than the zone allows in return for setting some aside as affordable. Chapter 8 "implements the requirements of Government Code Section 65915," and Section 10-8.103 says the state statute governs. The state law covers projects of "five or more residential units," so it starts where a fourplex ends.

Sources: Modesto Municipal Code Tables 10-8.801 and 10-8.802 and Section 10-8.404, Supplement 72.

An incentive or concession is a cut in a standard, such as a setback or parking count, that lowers the cost of the affordable homes (Section 10-8.401). Section 10-8.404 grants four incentives to a project that is 100 percent lower income, plus "a height increase of up to three (3) additional stories, or thirty-three (33) feet" within one-half mile of a major transit stop. Section 10-8.405 sends approval or denial of incentives to the City Council, and a denial needs written findings. On request, Section 10-8.501 caps parking at 1 space for a home of up to one bedroom, 1.5 for two or three bedrooms, and 2.5 for four or more.

Section 10-8.301 makes a site ineligible if it has homes with recorded affordable rents, rent control, or lower income tenants, but Section 10-8.302 restores eligibility when those homes are replaced at the same affordability. Section 10-8.303 cites "Section 18-8.301" twice; the code has no Title 18, and the rule it means is Section 10-8.301.

SB 79 and Other State Routes

SB 79 raises zoning near busy rail and bus stops, but only in an "urban transit county," which Government Code 65912.156 defines as "a county with more than 15 passenger rail stations." HCD's SB 79 advisory lists Alameda, Los Angeles, Sacramento, San Francisco, San Mateo, Santa Clara and San Diego Counties for July 1, 2026, and says "the geographic scope of SB 79 is dynamic." Stanislaus County is not on the list, so SB 79 does not change Modesto zoning today.

Other state routes do apply. SB 684 allows a map of up to 10 lots on a multifamily-zoned lot of up to five acres, and the lots and subdivisions page covers it. For a for-sale project, Section 10-7.103 limits condominiums to a P-D zone, so SB 684's separate lots are the other way to sell each home on its own.

Where to Go Next

Related on VanPlex: the Modesto overview, the SB 79 guide and the duplex to fourplex guide.

Frequently Asked Questions

Official sources (checked October 2026)