Two nearly identical estates can sit a few blocks apart on the Westside right now, one inside Beverly Hills city limits and one just over the line in Los Angeles, and the seller of the second one can owe hundreds of thousands of dollars more at closing for reasons that have nothing to do with the house itself. That gap has existed since April 2023. What changed this summer is that it got a lot more permanent.
Beverly Hills, unlike Bel Air, Brentwood, or Pacific Palisades, is its own incorporated city. Los Angeles' Measure ULA, the transfer tax most people call the mansion tax, only reaches property sold inside the City of Los Angeles. Beverly Hills sits outside that boundary entirely, so a seller there pays the standard county transfer tax and nothing else, while a seller of an equivalent estate a short drive away in an LA city neighborhood pays that same county tax plus the city's own transfer tax plus ULA on top of both.
The math nobody puts in the listing
The rates, current as of the July 1, 2026 inflation adjustment set by the LA Office of Finance, are 4 percent on the entire sale price between $5.4 million and $10.9 million, and 5.5 percent on the entire sale price at or above $10.9 million. That sits on top of the existing 0.45 percent city documentary transfer tax and 0.11 percent county transfer tax that apply to every sale inside LA city limits. Beverly Hills sellers pay only the 0.11 percent county piece.
Run two sale prices through both columns and the gap stops being a footnote.
| Sale Price | Total Transfer Tax in LA City (Bel Air, Brentwood, Palisades) | Total Transfer Tax in Beverly Hills | Difference |
|---|---|---|---|
| $6,000,000 | $273,600 | $6,600 | $267,000 |
| $12,000,000 | $727,200 | $13,200 | $714,000 |
This is arithmetic based on published rates, not tax advice, and every seller should confirm the exact figures with their escrow officer before pricing a listing. But the direction of the number doesn't move. On a $12 million sale, the city line is worth roughly the price of a very nice second home.
Why this line got more solid, not less, this summer
Sellers on the LA-city side of that boundary have spent the past two years assuming ULA might not survive. That assumption took a hit this summer.
In May 2026, the Howard Jarvis Taxpayers Association qualified a statewide ballot measure, the Local Taxpayer Protection Act, that would have capped every municipal transfer tax in California at roughly one-twentieth of one percent, gutting ULA overnight. It looked like the industry's best shot at killing the tax outright. Then, in a late-June deal with Sacramento lawmakers, the association agreed to pull the measure from the November ballot in exchange for a narrower substitute, Proposition 43, which raises the vote threshold for future citizen-initiated tax measures but does nothing to taxes that already exist. ULA was left standing.
Two weeks later, on July 1, 2026, the Los Angeles City Council closed the other door. It had been weighing its own carve-out, a proposal to exempt new multifamily and mixed-use construction from ULA for ten years, along with hardship relief tied to the January 2025 Palisades fire. The council voted unanimously to pull that measure too. No ULA reform of any kind will appear before LA voters this November.
That leaves the tax exactly where it's been since 2023, and it leaves Beverly Hills exactly where it's been too, on the other side of a line the state just declined to touch twice in a single summer.
Where the money is voting
Capital tends to notice this kind of thing before headlines catch up. One Beverly Hills, the roughly $10 billion mixed-use development rising next to the Beverly Hilton, secured $4.3 billion in new construction financing in March 2026 from JPMorgan and VICI Properties. Developers Cain International and Eldridge Industries are building two residential towers alongside an Aman hotel, part of a master plan by Foster + Partners, with retail commitments already signed from Dolce & Gabbana, Casa Tua, and Los Mochis. Turner Construction has crews on site, with concrete decks and columns poured through the site's western portion between January and April 2026, and the project's first pieces targeted to open in 2028.
None of that scale of commitment hinges on ULA one way or another. But it's a useful data point about where developers with serious legal counsel choose to build when they have a choice of Westside addresses. They chose the side of the line where a transfer tax bill doesn't scale with the size of the project.
The 90210 trap
Here's where the boundary gets genuinely confusing, and where a seller can get caught off guard. The 90210 zip code doesn't map cleanly to the city of Beverly Hills. A meaningful stretch of it is what's known locally as Beverly Hills Post Office, an area with a Beverly Hills mailing address that actually sits inside the City of Los Angeles and relies on LAPD and LAFD rather than the Beverly Hills police and fire departments. A property can carry a 90210 address on every piece of mail it has ever received and still be inside LA city limits for tax purposes.
That distinction matters at closing in a way a zip code search will never surface. Before a listing gets priced, the seller and their agent need to confirm which jurisdiction the parcel actually sits in, not which zip code the mail carrier uses. The Los Angeles County Assessor's parcel records settle the question in a few minutes, and it's worth doing before a purchase agreement gets signed, not after.
The rest of the Westside
The city-line arbitrage isn't unique to Beverly Hills. Malibu and Calabasas are also independent cities and also fall outside ULA's reach. Santa Monica is its own city too, but it isn't tax-free. It passed its own transfer tax, Measure GS, with tiers that top out at 5.6 percent on sales above $8 million, so a seller comparing Santa Monica to Beverly Hills is trading one tax structure for a different one, not trading a tax for no tax.
Bel Air, Brentwood, and Pacific Palisades sit inside LA city limits and carry the full ULA exposure described above. For a developer or an estate seller weighing those neighborhoods against Beverly Hills, the transfer tax difference isn't a footnote to the comparison. On anything above $10.9 million, it can be the largest single line item on the closing statement, larger than commissions, larger than escrow fees, larger than almost anything except the sale price itself.
A few direct questions
Does a 90210 address mean I'm exempt from Measure ULA? Not automatically. Confirm the parcel's actual jurisdiction with the LA County Assessor before assuming anything based on zip code or mailing address.
Is the Beverly Hills exemption permanent? Nothing in California tax policy is permanent, but as of this summer, both the effort to kill ULA statewide and the effort to reform it locally have failed for 2026. The exemption is as settled right now as it's been since the tax took effect in 2023.
How does Santa Monica compare? Santa Monica isn't subject to ULA either, but it has its own transfer tax, Measure GS, which reaches 5.6 percent on sales above $8 million. It's a different structure, not an absence of one.
If you're weighing a sale or acquisition across this line, whether it's an estate in Beverly Hills, a compound in Bel Air, or a redevelopment parcel anywhere between, the tax exposure belongs in the pricing conversation from day one, not as a surprise at the closing table. Sandler + Hirsch Group walks Westside sellers and developers through exactly this kind of boundary math before a listing goes live. Request a private home valuation to see where your property actually sits and what that means for your net.
