Buying a Home in Alameda County, CA: Transfer Tax, Rent Control & the Hayward Fault

Oakland and Berkeley layer some of the steepest city transfer taxes in the state on top of the county base, and the Hayward Fault runs straight through the county's densest cities.

Alameda County (Oakland, Berkeley, Fremont, Hayward, the City of Alameda, and surrounding East Bay cities) has some of the highest city-level transfer taxes in California, real rent-control exposure for multi-unit buyers, and sits directly on one of the most dangerous fault lines in the country. Which city a property is in changes the numbers substantially.

What’s the transfer tax in Alameda County?

Alameda County itself charges only the state base rate of $1.10 per $1,000 with no county-level add-on, but Oakland and Berkeley both layer a large additional city transfer tax on top that can push the effective rate well above 1.5% of the sale price.

Unincorporated Alameda County pays $1.10/$1,000 total with no city share. Fremont, Hayward, and the City of Alameda were not identified in available sourcing as having their own added city transfer tax — verify with the specific city before relying on that. Oakland and Berkeley are the exceptions, and the numbers are large enough to change your closing-cost math meaningfully — see below.

How much is transfer tax in Oakland and Berkeley compared to the rest of the county?

Oakland charges a tiered city transfer tax (Measure X) that runs 1.0%–2.5% depending on sale price, and Berkeley charges 1.5% up to $1.7M and 2.5% above it — both on top of the county's $1.10/$1,000 base.

Most Oakland sales fall in the $300,001–$2,000,000 bracket, taxed at 1.5% city + 0.11% county ≈ 1.61% combined — a $900,000 Oakland sale works out to roughly $13,500 city tax plus $990 county tax, about $14,490 total. Berkeley's two-tier structure creates a real cliff effect at $1.7M, similar in spirit to LA's Measure ULA: a $1.5M Berkeley sale owes about $24,150 total, while a $2M sale jumps to about $52,200. Berkeley's Measure W, approved by voters in 2024, replaces this with a three-tier schedule (1.5% baseline, 2.5–3.0% around $1.6–1.9M, 3.5% at $3.0M+) starting January 1, 2027 — confirm which schedule applies if you're closing near that date. By local custom this is typically seller-paid but negotiable in the contract. Always confirm current rates with the Alameda County Clerk-Recorder or the specific city's finance department before relying on a number.

Is there rent control in Alameda County?

Oakland and Berkeley both have local rent-control and just-cause eviction ordinances that can restrict what you can do after buying a tenant-occupied multi-unit property — single-family homes and condos are generally exempt under state law.

Oakland's Rent Adjustment Ordinance covers 2+ unit buildings built before January 1, 1983; single-family homes and condos are exempt from rent caps under the state's Costa-Hawkins law regardless of age, but Oakland's Just Cause for Eviction Ordinance can still restrict removing a tenant even where the rent cap doesn't apply. Berkeley's Rent Stabilization Program covers units where the tenancy began before January 1, 1996 (single-family/condo-type) or where a multi-unit building's first certificate of occupancy was issued before June 30, 1980; the statewide Tenant Protection Act (AB 1482) separately exempts new construction for its first 15 years regardless of local rules. Before offering on any 2+ unit property with existing tenants, get the building's permit/certificate-of-occupancy date and current lease terms, and verify coverage directly with the relevant city rent board — don't assume based on the building's age alone.

Am I buying near the Hayward Fault?

The Hayward Fault, a roughly 74-mile active fault the California Geological Survey considers one of the most dangerous urban faults in the country, runs directly through Fremont, Hayward, Oakland, and Berkeley.

The state's Alquist-Priolo Earthquake Fault Zoning Act requires a roughly 50-foot no-build setback from mapped active fault traces and mandates disclosure on the Natural Hazard Disclosure (NHD) statement when a property sits within a designated zone. Alquist-Priolo only covers surface fault-rupture risk — not shaking intensity, liquefaction, or landslide risk, which show up as separate NHD zone disclosures under the state's Seismic Hazards Mapping Act. Don't rely on the address alone: request the actual NHD report, and for older homes near the fault trace (Rockridge, North Oakland, the Berkeley Hills, downtown Hayward) consider a soils/geologic consultation before removing contingencies.

Does a multi-unit property come with a seismic retrofit obligation?

If it's an older wood-frame building with 5+ units and a "soft story" (open ground-floor parking or a weak first story), yes — Oakland and Berkeley both have mandatory retrofit ordinances targeting exactly that building type.

Oakland's Ordinance 13516 (effective January 2019) requires seismic retrofit for wood-frame, multi-unit buildings with 5+ units permitted before January 1, 1991 (or designed to 1985-or-earlier code), with compliance tiered by occupancy risk over roughly 4–6 years. Berkeley's Municipal Code Chapter 19.39 imposes a similar mandatory requirement for buildings on the city's soft-story/SWOF inventory with 5+ dwelling units. If you're purchasing a qualifying building, ask directly whether it's on the city's inventory list, its current compliance status, and whether retrofit work is complete, in progress, or not started — an incomplete retrofit is both a safety issue and a real near-term capital cost, a legitimate negotiation point distinct from a standard home inspection.

Disclosure landscape

Alquist-Priolo Earthquake Fault Zone disclosure applies to properties within the mapped Hayward Fault zone, required on the Natural Hazard Disclosure statement.
Landslide, liquefaction, and shaking-intensity zones are disclosed separately from Alquist-Priolo, under the state Seismic Hazards Mapping Act.
For qualifying multi-unit buildings, ask for the soft-story/SWOF inventory status and current seismic-retrofit compliance status directly — this is not always covered by a standard inspection.
Rent-control and just-cause coverage in Oakland and Berkeley depends on the building's exact permit or certificate-of-occupancy date — verify with the relevant city rent board rather than assuming from the building's age.

Frequently asked

Why is transfer tax so much higher in Oakland or Berkeley than the rest of Alameda County?

Both cities layer their own tiered transfer tax on top of the county's $1.10-per-$1,000 base — Oakland runs 1.0%–2.5% depending on price (Measure X) and Berkeley runs 1.5% up to $1.7M and 2.5% above it, versus no city add-on at all in most of the rest of the county.

If I buy a duplex in Oakland with a tenant in place, can I raise the rent to market rate?

Not necessarily and not immediately. If the building was permitted before January 1, 1983, it's covered by Oakland's Rent Adjustment Ordinance, which caps annual increases — check the current allowable increase via the Oakland Rent Adjustment Program before counting on higher post-purchase cash flow.

How dangerous is buying near the Hayward Fault?

It depends on the specific parcel, not the general neighborhood. If a property sits within the mapped Alquist-Priolo Earthquake Fault Zone, the seller must disclose it, and a site-specific geologic investigation may be required for new construction near the fault trace — request the actual NHD report rather than relying on area reputation.

This is educational guidance, not legal advice. Consult a California real estate attorney for legal questions specific to your transaction.