Multifamily and Duplex Properties for Sale in San Jose: Zoning and Rent Rules

What multifamily in San Jose looks like

San Jose has the largest stock of income property in Santa Clara County, and most of it falls into a few recognizable groups. There are duplexes and small buildings on R-2 streets in older neighborhoods, a very large inventory of 1960s and 1970s fourplexes and garden apartments, mobilehome parks, and newer mid-rise and podium buildings in Urban Villages, along transit corridors and downtown. For an investor the key dividing line is the year a building was built, because it decides whether the city’s rent ordinance applies and whether the new soft-story retrofit law reaches it. For two to four units, read financing 2-4 unit properties; for five or more, see apartment building loans.

Where the zoning allows it

Many complexes also sit under Planned Development zoning, where the PD permit, not the base district, controls unit count. Chapter 20.190 covers affordable housing density bonuses and Chapter 20.195 ministerial approvals; check both when sizing a development site.

ADUs and SB 9. ADUs are allowed on residential lots under state law and the city’s implementing rules, and SB 9 duplexes and lot splits can apply on qualifying single-family lots; Chapter 20.197 holds the city’s local implementation of state law. We did not review the ADU standards for this page. See our ADU investment guide and SB 9 lot split guide.

Rent rules: San Jose rent stabilization

Apartment Rent Ordinance. The city’s tenant protection page says the ARO covers apartments in buildings of three or more units built and occupied before September 7, 1979, and the city posts an online map of rent-stabilized properties. Increases are limited to 5% once every 12 months. Larger increases require a petition, such as a capital improvement or fair-return petition, and charges for new housing services such as pet rent or parking go through a joint petition, according to the city’s landlord welcome packet.

State cap for everything else. The Attorney General’s rent cap page, updated July 16, 2026, lists San Jose’s 5% ARO limit and places Santa Clara County in the All Other Counties group, where AB 1482 allows up to 8.6% for increases from August 1, 2026 through July 31, 2027. Newer buildings and duplexes that fall outside the ARO follow that state cap if they are covered, and are exempt if they meet an AB 1482 exemption. See our AB 1482 guide.

Tenant Protection Ordinance. Part 12 of Chapter 17.23, added in 2017 by Ordinance 29911, requires just cause to end a tenancy in rent-stabilized units, rental units in multiple dwellings, guesthouse rooms and unpermitted units. It lists 13 just causes. Five do not turn on tenant conduct: substantial rehabilitation, Ellis Act withdrawal, owner move-in, an order to vacate and vacating an unpermitted unit, and each carries relocation assistance tied to the Ellis Act base amount. See our just cause eviction guide.

San Jose rental property rules

• Rent Registry and fees. Owners of rent-stabilized apartments update occupancy data for each unit every year, and buildings with ARO units pay an annual program fee billed with the Code Enforcement occupancy permit fee.
• Termination notices. A copy of every termination notice goes to the Housing Department within three days of service, and so does any unlawful detainer summons and complaint.
• Ellis Act. The city’s Ellis Act ordinance applies to buildings of four or more apartments and requires notice and payments to displaced tenants; the city says new units on the site may come under the ARO.
• Buyouts. Voluntary tenant buyout agreements are a recognized process with city rules.
• Mobilehome parks. Spaces fall under the separate Mobilehome Rent Ordinance in Chapter 17.22, and park conversions need review under Chapter 20.180.
• Transfer taxes. Above about $2 million, Measure E adds 0.75% to 1.5% of the full price, on top of the city’s $1.65 per $500 conveyance tax and the County’s $0.55 per $500 documentary tax.

Soft-story retrofits and older buildings

San Jose now has a mandatory retrofit law. Chapter 17.41, effective April 1, 2025 under Ordinance 31123, reaches wood-frame buildings of two or more stories and three or more units built or permitted before 1990 that have a weak "target story," such as tuck-under parking. The code sorts buildings into three groups: pre-1978 buildings of five or more units, 1978 to 1989 buildings of five or more, and remaining buildings of three or more. Screening and construction deadlines run in that order. The dates printed in the code do not line up neatly with the stated durations, so confirm your building’s deadlines with the Building Division. Factor seismic retrofit costs into any older purchase, and budget for SB 721 balcony inspections at three or more units with elevated decks.

Underwriting a San Jose multifamily purchase

1. Pull the build date and unit count and check the city’s rent-stabilized property map; pre-September 1979 buildings of three or more units are likely under the 5% ARO cap.
2. Confirm Rent Registry filings and annual fees are current.
3. Ask whether the building has received soft-story screening instructions and which compliance group it falls in.
4. Collect leases, termination notices and estoppel certificates; confirm required notices were filed with the city.
5. Price Measure E and the conveyance tax into closing costs at the actual sale price.
6. Rebuild expenses with reassessed taxes and retrofit costs in our rental property analysis.

Questions people ask

Sources & notes

1. San Jose Chapter 20.30, Residential districts (GoCodebook)
2. San Jose Chapter 20.55, Urban Village and Mixed Use districts
3. San Jose Chapter 20.70, Downtown zoning
4. City of San Jose, tenant protection policies
5. City of San Jose, landlord welcome packet
6. San Jose Chapter 17.23 Part 12, Tenant Protection
7. San Jose Chapter 17.41, wood-frame target story retrofit
8. San Jose Chapter 4.59, Measure E and Chapter 4.58, conveyance tax
9. California Attorney General, rent caps (updated July 16, 2026)

Note: We did not review the ARO chapter text itself, Ellis Act payment amounts, the annual fee amount, the Mobilehome Rent Ordinance or the ADU standards. Soft-story deadline dates should be confirmed with the city.

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

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