LA's Mansion Tax: A Warning for California Homeowners About What's Next

Los Angeles' "mansion tax" was sold to voters as a simple idea: make millionaires and billionaires pay to fix the housing crisis. Three years later, the results should make every California homeowner pay close attention — because this is how new real estate taxes begin. I'm Mariness Chata, a Broker Associate and REALTOR® with 26+ years of residential experience in California.

It was never just about mansions

Measure ULA, in effect since April 2023, adds a 4% tax on sales over $5.4 million and 5.5% over $10.9 million within the City of Los Angeles. But despite the nickname, it applies to apartment buildings, offices, warehouses, and vacant land — anything that sells above the threshold. One Brentwood example from recent reporting: modest older homes where the land alone is worth more than $5 million get hit. Your "mansion" can be a teardown.

The promises vs. the results

ULA was projected to raise about $900 million a year. It brought in roughly $1.2 billion over three years — less than half. A RAND Corporation study found it blocked an estimated 9,100 homes from being built (about 1,000 of them affordable — the very thing the tax was supposed to create), wiped out 16,650 construction jobs, and cut high-value property sales by 31%. As of May, the city had spent just $114 million — less than 10% of what it collected — and $55.5 million of that went to preserving existing units, not building new ones.

Why this is a slippery slope

Every new real estate tax starts narrow and popular — "just tax the rich." Then the mechanism exists. Thresholds erode with inflation. Exemptions get debated, proposed, and dropped. Developers stop building, owners stop selling, and the housing shortage the tax was supposed to fix gets worse. Today it's transfers over $5.4 million inside LA city limits. The question California homeowners should ask is: what's next, and where?

Santa Clarita is outside ULA — for now

Santa Clarita is its own incorporated city in Los Angeles County, so ULA does not apply here. A $6 million sale in Brentwood triggers roughly a $240,000 tax bill; the same sale in Stevenson Ranch or Valencia triggers zero. That's a real advantage today. But "for now" is doing heavy work in that sentence — which is exactly why homeowners need an agent who tracks these laws, not just listings.

What California homeowners should do

Read ballot measures carefully. The friendly name on the ballot ("United to House LA") rarely describes the full mechanics. Look at what the tax covers, who really pays, and where the money goes. Watch your city, not just Sacramento. Transfer taxes are local — what LA did, other cities can copy. Talk to your agent before you sell. If you own property anywhere near a threshold — or own land, rentals, or commercial property — the tax picture can change what your sale nets you.

Frequently asked questions

Q: What is LA's mansion tax (Measure ULA)?

A: Measure ULA, approved by LA voters in 2022 and in effect since April 2023, adds a 4% transfer tax on property sales over $5.4 million and 5.5% over $10.9 million within the City of Los Angeles. It applies to residential, apartment, commercial, and land sales above those thresholds — not just luxury homes.

Q: Does the mansion tax apply in Santa Clarita?

A: No. Santa Clarita is an incorporated city in Los Angeles County, separate from the City of Los Angeles, so ULA does not apply here. A high-value sale in Stevenson Ranch, Valencia, or anywhere in the Santa Clarita Valley triggers zero ULA tax.

Q: I'm selling a high-value property. How do I know if ULA affects me?

A: It depends on where the property sits and the sale price. If the property is within Los Angeles city limits and sells above $5.4 million, the seller owes the tax at closing. Before you list, talk to an agent who understands the current rules — the details matter enormously at these price points.

Q: Could similar taxes come to other California cities?

A: That's the concern. Transfer taxes are enacted city by city, and LA's experiment is being watched statewide. California homeowners should read every ballot measure carefully and work with an agent who tracks proposed real estate laws — not just current ones.

I've spent 26+ years helping California homeowners navigate exactly this kind of shifting ground. If you want to understand how current and proposed laws affect your property's value and your plans, call Mariness Chata at (661) 317-3332.