Few housing policies in recent memory have been as misunderstood as Measure ULA. It went to LA voters in November 2022 branded as a "mansion tax" — a surcharge on the sale of trophy homes, with the proceeds aimed at affordable housing and homelessness prevention. It passed with 58% support and took effect April 1, 2023.
The branding was misleading in two ways that matter for anyone buying, selling, or building in Los Angeles. First, it is not limited to mansions, or even to homes. Second, and more consequentially, the evidence now suggests it is shrinking the city's housing supply rather than expanding it. This piece walks through what the tax actually is, what the research finds, and why a measure designed to fund housing appears to be suppressing it.
First, what Measure ULA actually taxes
Measure ULA is a transfer tax — a one-time charge triggered whenever real property changes hands, calculated on the gross value of the deal. It is not an annual property tax, and it is not based on profit or equity. It sits on top of the city's existing 0.45% base transfer tax.
The tax is charged on the entire value of the transaction, not the slice above the threshold — so crossing the line by a single dollar can trigger a six-figure bill.
Source: LA Office of Finance, thresholds effective July 1, 2025. Thresholds adjust annually with inflation; figures approximate, as of May 2026. Informational only — not tax or legal advice.
The thresholds adjust each year with inflation, which is why the original "$5 million and $10 million" figures from the ballot have crept up to roughly $5.3M and $10.6M as of 2026 (and are set to rise again to about $5.4M and $10.9M after June 30, 2026). Always confirm the current figure with the LA Office of Finance before a transaction.
The "mansion tax" was never just about mansions
Here is the part most voters missed: ULA applies to every category of real property above the threshold — apartment buildings, office towers, retail centers, industrial sites, and raw land, not only single-family homes. There is no commercial carve-out. Through the end of 2025, roughly 60% of taxed deals were single-family residences, about 24% were commercial, and about 13% were multifamily. That breadth is exactly why the tax has reached into the machinery of housing development itself.
The central question: more units, or fewer?
The promise was that ULA revenue would subsidize thousands of new affordable apartments. To evaluate that, you have to look at two things at once: how much housing the revenue funds, and how much housing the tax discourages on the private side. When you net those out, the picture is not flattering.
In April 2025, researchers at UCLA's Lewis Center for Regional Policy Studies and the RAND Corporation published "Taxing Tomorrow," the most rigorous study of ULA's development effects to date. Their method was clever: they compared housing production inside the LA city boundary — where ULA applies — against comparable areas just outside it that aren't subject to the tax. That natural experiment let them separate ULA's effect from broader headwinds like interest rates.
In the two years after ULA took effect, LA multifamily permitting fell well below its pre-tax peak — the steepest sustained drop of any large metro in the region.
Source: UCLA Lewis Center / RAND, "Taxing Tomorrow" (April 2025); CoStar. Index relative to 2022 peak; figures approximate.
Their conclusion was direct. ULA is reducing multifamily housing production in Los Angeles by at least 1,910 units per year — an 18% decline relative to the 2020–2022 average, among projects of 20 or more units. They described it as a robust causal link, not a coincidence of timing.
Why a housing tax would reduce housing
The mechanism is the genuinely interesting part, and it's where the policy design backfires. A newly built apartment building is a high-value asset; when it sells or refinances, the price routinely exceeds $5.3M. So the building gets taxed — meaning the developer's eventual exit is worth 4% to 5.5% less. Developers underwrite that hit at the very start, when they decide whether a project pencils. Squeeze the exit, and fewer projects clear the bar to get financed and built.
- Tax only the biggest, priciest deals
- Channel the money into affordable housing
- Build thousands of new income-restricted units
- Raise $600M–$1.1B every year
- Newly built apartment buildings sell for >$5.3M — so they get taxed
- A 4–5.5% hit on the sale shrinks the developer's exit
- Fewer projects pencil → fewer get built
- Fewer market-rate units → fewer bundled affordable units
The tax lands on the same new apartment construction it was meant to subsidize. When selling a finished building costs more, fewer buildings get financed in the first place.
The affordable-housing irony runs even deeper. Most large LA projects use density bonus programs: developers get permission to build more units in exchange for setting aside a share as income-restricted — without public subsidy. So when market-rate construction falls, the bundled affordable units fall with it. The UCLA/RAND team estimates that's at least 168 affordable units a year lost — more than the roughly 70 units a year the tax revenue from those same building sales could subsidize.
The UCLA Lewis Center and RAND established a causal link — not just a correlation — between Measure ULA and reduced apartment construction, by comparing development inside the LA city line against nearly identical areas just outside it. Their conclusion: the tax is producing roughly 1,910 fewer apartments a year, including an estimated 168+ fewer affordable units. Only about 8% of ULA revenue — some $29M a year — even comes from selling recently built apartments. The city is taxing the thing it wants more of.
The revenue reality
Supporters correctly point out that ULA crossed $1 billion in cumulative revenue by January 2026, across about 1,435 transactions, and the city has begun deploying it — including a roughly $360 million allocation in spring 2026 toward thousands of affordable units (most of it preserving existing units rather than building new ones). That is real money doing real work, and it deserves to be acknowledged.
But annual collections have run at roughly $280–413 million — well under the $600 million to $1.1 billion the campaign projected. The reason is the same friction that's slowing construction: high-value deals are simply happening less often. UCLA research estimates the odds of a property selling above the $5M threshold fell by as much as 55% after the tax took effect.
ULA has crossed $1 billion cumulatively — a real number — but annual collections have consistently landed below even the low end of what supporters projected, because the high-value deals it taxes are happening less often.
Source: LA Housing Dept.; UCLA; CalMatters; Commercial Observer (Jan 2026). Cumulative revenue surpassed $1B across ~1,435 deals by Jan 2026. Figures approximate, as of May 2026.
What this means if you own or build in LA
For owners of property in the $4.5M–$5.5M band, ULA exposure can change the math on whether and when to sell — sometimes meaningfully. For larger assets, the 4–5.5% charge is real money that doesn't show up on a typical pre-sale valuation, and it deserves a line in any net-proceeds analysis. And for developers weighing an LA City project against one a few blocks outside the line, the tax is now part of the feasibility conversation from day one. Run the numbers in our investment calculator →
There's also a live political variable. On May 3, 2026, the California Secretary of State certified the Howard Jarvis Taxpayers Association's Local Taxpayer Protection Act for the November 3, 2026 statewide ballot. If it passes, it would cap municipal transfer taxes at 0.05% — effectively gutting ULA. If it fails, ULA stays exactly as it is, and a higher-threshold "ULA 2.0" has been floated. Either way, the next several months carry unusual weight for anyone timing a large LA transaction.
The bottom line
Measure ULA was sold as a way to build more housing. The most credible independent evidence we have — a causal study comparing LA to its own backyard — finds it is building less: roughly 1,910 fewer apartments a year, affordable units included. Researchers have proposed a targeted fix (exempting newly built multifamily from the tax for 15 years) that they argue would cost little revenue while restoring supply. Whether LA adopts a reform, voters repeal the tax, or it stays as-is, the lesson is already clear: a tax aimed at the symptoms of a housing shortage can quietly deepen the shortage itself.
This article is for general informational purposes only and does not constitute tax, legal, financial, or investment advice. Tax thresholds, rates, and laws change — including potential changes on the November 2026 ballot. Confirm current figures with the City of Los Angeles Office of Finance and consult a qualified tax or legal professional before making any transaction decision. Research figures are approximate and as of May 2026.
