Two homes, half a mile apart, both carry a Beverly Hills mailing address and the same 90210 zip code. Both sell for $8 million. One seller writes a check for $320,000 to the City of Los Angeles at closing. The other doesn't owe a dollar of it.
The difference has nothing to do with the size of the lot, the school the kids attend, or how the listing photographs. It comes down to a boundary line drawn when Beverly Hills incorporated in 1914, a line that still splits the 90210 zip code into two legally different cities. If you're pricing a sale anywhere near Sunset Boulevard this year, that line matters more than almost anything else on the disclosure form.
The Boundary Nobody Mails to You
The area north of Sunset, stretching up into the hills toward Mulholland Drive, is known informally as Beverly Hills Post Office, or BHPO. It earned the name because the U.S. Postal Service routes its mail through the Beverly Hills post office, so residents write "Beverly Hills, CA 90210" on every envelope. But BHPO was never annexed into the city of Beverly Hills. It sits inside the City of Los Angeles. Residents vote in Los Angeles elections, their kids attend Los Angeles Unified schools rather than Beverly Hills Unified, and LAPD and LAFD, not the Beverly Hills Police and Fire Departments, respond to calls. That jurisdictional gap has caused real confusion before: when Demi Moore needed an ambulance at her BHPO home in January 2012, Los Angeles and Beverly Hills 911 operators reportedly spent over two minutes sorting out whose call it was.
That same line now decides who owes Measure ULA, the transfer tax Angelenos call the mansion tax. Because BHPO parcels sit inside Los Angeles city limits, they are fully subject to the tax. Properties in Beverly Hills proper, the incorporated city with its own police force, fire department, and municipal code, are not. Same zip code. Same mailing address. Opposite tax exposure.
What Measure ULA Actually Charges After July 2026
The Los Angeles Office of Finance confirmed that for transactions closing after June 30, 2026, the thresholds rose again to $5,400,000 and $10,900,000, the latest in a series of annual adjustments since the tax took effect in April 2023. The rates themselves haven't moved.
| Sale price | ULA rate | Tax owed |
|---|---|---|
| $5,399,999 or below | 0% | $0 |
| $5,400,000 to $10,899,999 | 4% of full price | $216,000 at exactly $5.4M |
| $10,900,000 or above | 5.5% of full price | $599,500 at exactly $10.9M |
That figure sits on top of the Los Angeles County transfer tax, which applies to every sale countywide, and the added city transfer tax that applies only within Los Angeles city limits. A BHPO seller closing at $10 million owes roughly $400,000 in ULA alone, on top of both of those base taxes. A Beverly Hills proper seller at the identical price owes only the county portion.
The Cliff Beneath the Cliff
Here's the part that catches sellers off guard even after they've confirmed which side of the line they're on. Measure ULA isn't a marginal tax. It doesn't apply only to the dollars above the threshold, it applies to the entire sale price the moment the price crosses the line. A BHPO home that sells for $5,399,999 owes nothing. The identical home sold for $5,400,001 owes $216,000. One dollar of sale price costs the seller over two hundred thousand dollars.
That single design choice explains why threshold pricing has become a real strategy rather than a theoretical one for agents working the hills above Sunset. A seller sitting on a home that might fetch $5.6 million has a genuine incentive to list and negotiate toward $5.39 million instead, because the after-tax proceeds can be higher at the lower price. It also means two nearly identical BHPO listings, priced a few thousand dollars apart, can produce net proceeds that differ by six figures.
So there are really two cliffs operating in greater Beverly Hills right now. One is a price cliff inside BHPO, where crossing $5.4 million or $10.9 million triggers a lump-sum tax on the whole transaction. The other is a jurisdiction cliff, where crossing a physical boundary line removes the tax entirely no matter the price. A seller working with an agent who only understands one of the two is working with half the information.
Where the Money Has Already Moved
The market has been repricing around this boundary for three years now. Research cited by the law firm Hanson Bridgett estimates that Measure ULA has reduced the odds of a Los Angeles property selling above the $5 million threshold by as much as 55 percent, and the city confirmed in January 2026 that the tax had crossed $1 billion in cumulative revenue since it took effect.
Some of that chilled activity in LA-city luxury pockets like Bel Air, Holmby Hills, and Brentwood appears to have simply relocated a few blocks over. Beverly Hills proper closed 57 single-family and condo transactions in the first quarter of 2026, a 10 percent increase over the 52 closings in the same period of 2025, though volume still ran about 22 percent below the market's 2022 peak. Cash buyers dominate at every price point in the city, accounting for roughly two-thirds to seventy percent of single-family sales and climbing to 85 to 90 percent in the $10 million-plus tier, which insulates that segment from mortgage rate swings but does nothing to insulate a BHPO seller from ULA.
The luxury condo market has kept moving too. One Mandarin Oriental Residences penthouse in Beverly Hills traded for $13.3 million in March 2026, or roughly $3,852 per square foot, the highest per-square-foot condo sale in the county that year according to a July 2026 report from The Real Deal. That same reporting tracked several luxury brokers moving between firms in Beverly Hills and Carolwood Estates this year, a sign of how much broker attention has concentrated around the tax-exempt side of the line.
Five Things to Verify Before You Price a Listing Near the Boundary
A 90210 address on a piece of mail proves nothing about which government collects your transfer tax. Before setting a list price on anything north of Sunset or anywhere the boundary might run through a block, confirm:
- The parcel's actual city jurisdiction through the Los Angeles County Assessor's parcel records, not the mailing address
- Whether police and fire response comes from Beverly Hills PD and Fire or from LAPD and LAFD
- Which school district the parcel is zoned to, Beverly Hills Unified or Los Angeles Unified
- Whether the sale price, once confirmed as ULA-eligible, sits close enough to $5.4 million or $10.9 million to justify a threshold pricing conversation
- Whether the closing date falls before or after any change to the July 1 CPI-adjusted thresholds, since the numbers move annually
What Could Change This by Winter
None of this math is guaranteed to hold past this year. A statewide ballot initiative backed by the Howard Jarvis Taxpayers Association is aiming for the November 2026 ballot with language that could cap or significantly limit municipal transfer taxes like Measure ULA. The Los Angeles City Council considered its own rewrite of the ordinance in January 2026, including a proposed exemption for new construction, but declined to advance it to a June ballot, leaving the current rates and thresholds in place for now. Anyone timing a sale for late 2026 or into 2027 should treat the current numbers as current, not permanent.
Frequently Asked Questions
Does a 90210 address mean I'm exempt from Measure ULA? No. Zip code and mailing address have no bearing on which city collects the tax. Only the parcel's legal jurisdiction, City of Los Angeles or City of Beverly Hills, determines exposure.
If my BHPO home might sell for close to $5.4 million, does it matter which side of that number I land on? Yes, significantly. Because the tax applies to the entire sale price once the threshold is crossed, a sale at $5,399,999 owes nothing while a sale one dollar higher owes $216,000.
Could Measure ULA go away before I sell? It's possible but not decided. A November 2026 statewide ballot measure could limit or repeal it, and the city itself has floated changes that stalled earlier this year. Until either happens, the current thresholds and rates remain in effect.
Pricing a home correctly near this boundary takes more than a comp sheet. It takes knowing exactly which government has a claim on your proceeds before you set a number. If you're weighing a sale in Beverly Hills proper or the BHPO hillside above it, the Dutchover Team can walk your specific parcel through the jurisdiction check and the tax math before you commit to a list date. Get a Free Home Valuation and find out exactly where you stand.
