Two offers went into escrow on the same Tuesday this summer. One buyer was closing on a $2.5 million home in Pleasanton. The other was closing on a nearly identical $2.5 million home in Danville, twenty minutes up the freeway. Same price. Same loan size. Same general idea of what "East Bay luxury" looks like on paper.
Their closing statements did not match, and the gap had nothing to do with negotiation, staging, or who had the sharper agent. It came down to a county line neither buyer had thought about, and a city ordinance passed four decades before either of them started house hunting.
The number Redfin and Zillow never show you
Every real estate sale in California carries a documentary transfer tax, a flat state-mandated charge of $1.10 for every $1,000 of the sale price. It applies everywhere. On a $2.5 million home, that base tax comes to $2,750 no matter which county the property sits in.
Where it stops being uniform is at the city level. Some California cities layer their own transfer tax on top of the county base. Pleasanton is one of them. Under Ordinance 1222, Section 2, adopted by the Pleasanton City Council in 1985, the city collects an additional $0.55 for every $1,000 of sale price, matching the county's own rate and effectively doubling the transfer tax burden on every sale inside city limits. That ordinance has never been repealed. It is still the reason a Pleasanton closing statement looks different from a Danville one.
Danville, Alamo, and San Ramon do not carry that second layer. All three sit in Contra Costa County, where closing cost guides describe the transfer structure as the county's flat base rate with no city add-on stacked on top. Buy in Contra Costa and you pay the state minimum. Buy in Pleasanton and you pay the state minimum twice, once to the county and once to the city that decided, in 1985, to collect its own share.
Here is what that looks like on the same $2.5 million purchase:
| Danville, Alamo, San Ramon (Contra Costa County) | Pleasanton (Alameda County) | |
|---|---|---|
| County transfer tax | $2,750 | $2,750 |
| City transfer tax | None | $1,375 |
| Total documentary transfer tax | $2,750 | $4,125 |
The difference is $1,375 on this example, entirely attributable to a single municipal ordinance rather than anything about the home, the buyer, or the current market. It will not show up in a median price comparison. It will not show up in a square footage calculation. It shows up once, on the settlement statement, after the offer has already been accepted.
Pleasanton isn't alone, and that's the actual pattern
Pleasanton is not an outlier city that happened to pass an unusual tax. It belongs to a small group of Alameda County cities that each adopted an identical city-level transfer tax through their own general-law ordinances: Dublin under Ordinance No. 1 in 1982, Union City under Ordinance 75-67 in 1967, and Pleasanton under Ordinance 1222 in 1985. Fremont, Livermore, and Newark carry the same rate through their own municipal actions. Every one of these cities charges the identical $0.55 per $1,000, layered on the same $1.10 per $1,000 county base, for a combined rate of $1.65 per $1,000 across all six.
The pattern is geographic, not incidental. Cross from Contra Costa into Alameda County and the closing math changes before you've changed anything about the house you're buying.
For a buyer comparing Danville against Pleasanton, or San Ramon against Dublin, the transfer tax difference is a fixed cost of the county line itself. It doesn't fluctuate with interest rates or inventory. It has been sitting in municipal code for forty years, waiting for someone to notice it in the fine print of an estimated closing cost sheet.
The part where even the professionals disagree
The transfer tax rate is settled law. Who actually pays it is not, and this is where local custom gets genuinely inconsistent even among people who close these transactions for a living.
Several Bay Area closing cost guides describe Contra Costa County's convention as seller-pays for the county transfer tax, a norm reflected in standard title company reference sheets used across the region. Other guides describe Alameda County the same way, with the seller customarily covering the county base while the city portion is more often split evenly between buyer and seller. Still other sources describe a broader Northern California norm where the buyer is the one who typically picks up the transfer tax, framing Alameda County specifically as a place where the buyer often ends up covering it.
None of these are wrong exactly. They are describing custom, not statute, and custom is negotiable by definition. California law does not assign the transfer tax to either party. It only requires that it gets paid and declared on the deed. Everything else, seller pays, buyer pays, split down the middle, gets decided inside the purchase contract itself.
That matters more in Pleasanton than in Danville, precisely because Pleasanton's total transfer tax bill is fifty percent higher. A buyer who assumes "the seller always covers this" without confirming it in writing is assuming a norm that half the industry's own reference guides don't agree exists.
One more place the county line shows up
The transfer tax is a one-time cost. The county line shows up again in a recurring one. Contra Costa County's effective property tax rate for the current assessment year runs roughly 1.10 percent to 1.40 percent of assessed value across most cities, built from the state's 1 percent Proposition 13 base plus voter-approved bonds and special assessments specific to each parcel's tax rate area. In Mello-Roos communities, including Dougherty Valley in San Ramon and pockets of Danville, that effective rate can climb past 1.50 percent.
The mechanism is different from the transfer tax story. It isn't a county-versus-county comparison so much as a reminder that two homes on the same street can carry different tax burdens depending on which bond measures and assessment districts attach to the specific parcel. The lesson underneath both examples is the same one worth carrying into any cross-town comparison: the number on the listing page is never the whole number.
What this actually changes if you're comparing towns
If you are weighing Danville against Pleasanton, or San Ramon against Dublin, on the strength of median price alone, you are comparing two numbers that were never fully comparable to begin with. The fix isn't complicated. It just requires asking the question before the offer goes in rather than reading it off the settlement statement afterward.
A few things worth confirming with your agent and escrow officer before you write on a home in any of these towns:
- What is the actual combined transfer tax rate for this specific city, and does it include a city-level layer on top of the county base
- What does the purchase contract say about who pays it, rather than what "custom" is assumed to say
- Whether the parcel sits inside a Mello-Roos or special assessment district that raises the effective property tax rate above the county's general range
None of this changes whether Danville, Alamo, San Ramon, or Pleasanton is the right fit for a given family. Each of these towns has its own case to make on schools, commute, and lifestyle. What it does change is the confidence with which a buyer can compare two numbers that look identical on a portal and turn out not to be.
Talk it through before you write the offer
Comparing East Bay towns on price alone leaves real money on the table, in either direction. If you're weighing Danville, Alamo, San Ramon, or Pleasanton and want the actual closing math worked out before you write an offer, or you're selling a premium home in any of these markets and want a pricing and marketing strategy built around what today's numbers actually mean, Cynthia Money can walk through it with you directly. Request Your Personalized Consultation and get the full picture before the decision, not after it.
FAQ
Does this transfer tax difference apply anywhere else besides Pleasanton? Yes. Dublin, Fremont, Livermore, Newark, and Union City all carry the same combined 0.165 percent rate through their own individually adopted city ordinances, meaning any Alameda County city on that list carries the identical transfer tax gap against a comparable Contra Costa property.
Is the transfer tax something a buyer can negotiate away? The tax itself is fixed by county and city ordinance and cannot be waived. Who pays it is a matter of contract negotiation, not law, so it belongs in the purchase agreement explicitly rather than left to assumed custom.
Does Alamo, as an unincorporated area, work differently than Danville or San Ramon? Alamo has no city government of its own, so there is no municipal body that could adopt a city-level transfer tax even if it wanted to. It follows the Contra Costa County base rate directly, the same flat structure described for the county's other cities in the transfer tax guides referenced here.
