Multifamily and Duplex Properties for Sale in Mountain View: Zoning and Rent Rules

What multifamily in Mountain View looks like

Mountain View has a large rental stock for its size. Much of it is older apartment complexes in R3 zones along the city’s arterials and residential streets. The city also has duplexes and small buildings, several mobile home parks, and newer mid-rise buildings in precise plan areas such as East Whisman and North Bayshore. What sets the city apart is its voter-adopted rent law, the Community Stabilization and Fair Rent Act, which covers most older apartments and is stricter than state law. For two to four units, read financing 2-4 unit properties; for larger buildings, see apartment building loans.

Where the zoning allows it

Article IV of Chapter 36 sets the residential zones. The R3 zone does not use a units-per-acre number. Instead, a numeric suffix sets how much lot area each unit needs:

Every R3 subzone needs 7,000 square feet for two units and 12,000 for three. Standard R3 also limits buildings to 45 feet, 1.05 FAR and 35% site coverage, and requires 55% open area. Small lots are capped: a lot under 7,000 square feet gets one unit, a lot from 7,000 to 12,000 square feet gets two, and any lot under 80 feet wide is held to two units. Precise plans set their own residential standards, so a parcel in East Whisman or North Bayshore will not follow this table.

ADUs and SB 9. ADUs have their own division in Article IV, and SB 9 two-unit projects and lot splits can apply on qualifying single-family lots under state law. We did not review the city’s ADU standards. See our ADU investment guide and SB 9 lot split guide.

Rent rules: CSFRA rent stabilization

What is covered. Article XVII of the City Charter, the CSFRA, was added in November 2016. It covers rental units unless exempt. Single-family homes, condominiums, companion units and duplexes are exempt. Units with a first certificate of occupancy from February 1, 1995 to the Act’s effective date are only partly exempt: they skip rent limits but must still follow just cause. Units first occupied after the Act took effect are fully exempt. Read together, apartments in buildings of three or more units first occupied before February 1995 are generally fully covered.

Annual increase. Each year the Rental Housing Committee sets an Annual General Adjustment equal to 100% of the regional CPI change, with a 2% floor and a 5% ceiling, effective September 1. The Attorney General’s rent cap page, updated July 16, 2026, lists Mountain View’s current maximum at 2.5% for September 1, 2026 through August 31, 2027. Landlords may bank unused increases, but banking does not pass to a buyer, and total increases in 12 months cannot exceed 10% without a petition.

Petitions and fees. Landlords can petition for a fair rate of return, and tenants can petition for reductions over habitability or lost services. Landlords also pay an annual Rental Housing Fee set by the Committee.

Just cause. The Act lists eight grounds, including nonpayment, lease breach after a written notice to cease, substantial repairs, owner or relative move-in, withdrawal from the market and demolition. Owner move-in carries a 36-month occupancy requirement and extra protections for long-term tenants who are older, disabled or terminally ill. Units the CSFRA fully exempts fall back to AB 1482, which allows up to 8.6% in Santa Clara County from August 1, 2026. See our AB 1482 guide and just cause eviction guide.

Mountain View rental property rules

• Tenant relocation. Chapter 46, Article II, re-enacted by Ordinance 1.2026 on January 27, 2026, applies to tenants of any residential building. Permanent displacement through market withdrawal, demolition, condo conversion or owner move-in triggers payments for households earning up to 120% of County median income plus $5,000. Payments include three months of comparable median rent, a deposit refund, relocation services and moving help. Households with older, disabled or minor members, or with lower incomes, get an added $8,000 per unit, CPI-adjusted. Displaced tenants also have a right of return.
• Mobile homes. Article I of the same chapter holds the city’s mobile home rent stabilization rules, re-enacted in 2026.
• Short-term rentals. Chapter 44 requires registration and a business license and caps unhosted rentals at 60 days a year.
• Transfer tax. The city’s conveyance tax is $1.65 per $500 up to $6 million and 1.5% above $6 million, in addition to the County’s $0.55 per $500.

Older complexes, retrofits and inspections

Much of the CSFRA stock is older wood-frame construction, some of it with tuck-under parking. We did not find a mandatory soft-story ordinance in the Mountain View code for this page, but lenders and insurers will still want a seismic retrofit review. Buildings of three or more units with elevated balconies need SB 721 balcony inspections. Under the CSFRA, capital improvements needed for code compliance count in a fair-return petition, so keep records of every repair.

Underwriting a Mountain View multifamily purchase

1. Pull the first certificate of occupancy date: before February 1995 means full CSFRA coverage for buildings of three or more units.
2. Model increases at the Annual General Adjustment, currently 2.5%, and treat any seller’s banked increases as lost at closing.
3. Confirm the Rental Housing Fee is paid and that rents match the Committee’s records.
4. Budget relocation costs under the 2026 ordinance for any redevelopment or owner move-in plan.
5. Collect leases and estoppel certificates.
6. Add the city conveyance tax and reassessed property taxes to your rental property analysis.

Questions people ask

Sources & notes

1. Mountain View Charter Article XVII, CSFRA (GoCodebook)
2. Chapter 36, R3 Multiple-Family standards
3. Chapter 46 Article II, Tenant Relocation Assistance
4. Chapter 44, Short-Term Rentals
5. Chapter 29 Article V, Real Property Conveyance Tax
6. California Attorney General, rent caps (updated July 16, 2026)

Note: We did not review the R2, R4 or ADU divisions, the mobile home article text, the Rental Housing Fee amount or the CSFRA regulations. The absence of a soft-story mandate reflects our search of the code index only.

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

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