Multifamily and Duplex Properties for Sale in Isleton: Zoning and Rent Rules

What multifamily in Isleton looks like

Isleton is a small Delta city, and its rental stock is a mix of old and modest: rooms and apartments over Main Street storefronts in buildings rebuilt after the 1926 fire, small multifamily buildings on the blocks behind the commercial core, houses with second units, and mobile home parks. Most deals are two to four units or mixed-use buildings rather than large complexes. For financing, see financing 2-4 unit properties and apartment building loans.

Where the zoning allows it

Isleton adopted a new zoning ordinance on June 11, 2024, as Exhibit A of Ordinance 2024-04. Its multifamily districts are named for the lot area each unit needs, in thousands of square feet. (Unit-per-acre figures below are our arithmetic, not the code’s.)

Older lots. The R-1 small-lot exception points to the older housing area between Jackson Boulevard and H Street, north of Sixth Street, where lots of 4,000 to 6,999 square feet can be built through a planned development application.

ADUs. The 2024 ordinance allows ADUs in R-1, the RM districts, CC, PDI, MXU and RCO, but not UR; in nonresidential zones an ADU needs a house on the site, and ADUs may sit 4 feet from the rear line. Full standards are in Section 405. See our ADU investment guide.

SB 9. State two-unit and lot split rules apply to qualifying single-family lots in R-1; confirm flood and historic constraints first. See our SB 9 lot split guide.

Rent rules: state law only

Isleton has no local apartment rent ordinance on the Attorney General’s rent cap page, which lists only the City of Sacramento for this county. Sacramento County falls under All Other Counties: covered units may rise up to 7.7% for increases from August 1, 2025, and 8.6% for increases from August 1, 2026 through July 31, 2027. See our AB 1482 guide and just cause eviction guide.

Isleton rental property rules

• City rental inspection code. Isleton has its own Rental Housing Inspection Code, Chapter 5.66, with articles on registration and fees, inspections, a self-certification program and enforcement. Because Isleton is a city, the County’s unincorporated-area program does not apply; ask the city for current fees and inspection status for any building you buy.
• Short stays. A stay of fewer than seven consecutive days counts as transient occupancy under the city’s transient occupancy tax, taxed at 10% of rent and remitted quarterly by an operator registered with the City Clerk. We did not find short-term rental standards in the 2024 zoning text we reviewed, so confirm with the city before underwriting short stays.
• Historic buildings. Upper-floor units in the National Register districts bounded roughly by River Road, H, Union and E Streets are local resources under Chapter 8.17; exterior changes need a certificate of appropriateness.
• Transfer tax. The city’s transfer tax chapter sets $0.275 per $500; the County Clerk-Recorder charges $0.55 per $500 and names only the City of Sacramento as adding a separate city tax. Confirm the total with escrow.

Flood, levees and older buildings

Isleton sits on the Sacramento River in the Delta, and the County’s Delta Protection Element places it within or just outside the Secondary Zone. The County’s 2021 Local Hazard Mitigation Plan Delta Annex puts 224 of the city’s 233 acres, about 96%, in the 1% annual chance flood zone (Zone AE), and recounts the June 1972 levee failure at the south end of Andrus Island that forced the evacuation of the town and damaged or destroyed a large share of its housing. Flood insurance, elevation certificates and levee condition should be early diligence items; the city also has a flood damage prevention chapter (5.52) we did not review. Most downtown buildings are wood-frame structures from the late 1920s and 1930s, so plan for a seismic retrofit review and electrical and plumbing updates, and order SB 721 balcony inspections for buildings of three or more units with elevated balconies.

Nonconforming rebuilds. Under the 2024 ordinance, a nonconforming residential building damaged by more than 50% of its value may generally be rebuilt to its prior size and unit count unless the city finds that harmful to health or safety, with permits due within two years. That provision matters for insurance planning on older buildings that exceed today’s density.

Underwriting an Isleton multifamily purchase

1. Confirm the zone under the 2024 ordinance and count units against the site area per unit for that RM district.
2. If the building exceeds current density, document its legal nonconforming status; the owner carries the burden of proof.
3. Confirm Rental Housing Inspection Code registration and any open inspection items.
4. Classify units under AB 1482 and model increases at or below 8.6% for covered units.
5. Collect leases, the rent roll and estoppel certificates.
6. Price flood insurance and reassessed taxes into our rental property analysis.

Questions people ask

Sources & notes

1. City of Isleton Zoning Ordinance, Ordinance 2024-04 Exhibit A, adopted June 11, 2024
2. Isleton Chapter 5.66, Rental Housing Inspection Code (GoCodebook)
3. Isleton Chapter 3.16, Transient Occupancy Tax
4. Isleton Chapter 8.17, Historic Preservation Ordinance
5. Isleton Chapter 3.32, Documentary Transfer Tax
6. National Park Service, Isleton Chinese and Japanese Commercial Districts
7. Sacramento County General Plan, Delta Protection Element
8. California Attorney General, Rent Caps (updated July 16, 2026)
9. Sacramento County Clerk-Recorder, Documentary Transfer Tax
10. Sacramento County LHMP Update, Delta Annex (September 2021)

Note: We could not read the article text of Chapter 5.66, only its structure, and did not review Section 405 (ADUs), the mobile home park standards or Chapter 5.52 (flood). Some online code text still reflects the 2015 zoning code.

General information, not legal or tax advice. Last reviewed October 2026 by Matthew Martinez.

Related: Isleton real estate guide · Commercial real estate in Isleton · Multifamily investing guide · Investor services