What is Mello-Roos and who pays the tax?

Last updated September 1, 2026

By Kurt Mellinger, Principal Agent, Ascension Estates at Equity Union Real Estate. DRE #02238998.

Mello-Roos is a special tax that some California homes pay on top of the regular property tax. A Community Facilities District charges it under a 1982 state law to repay bonds that built the neighborhood's roads, schools, parks and utility lines. The homeowner pays it, every year, as its own line on the county tax bill. It is set by formula rather than by home value, and in newer communities it can add hundreds of dollars a month.

Two houses at the same price can carry very different tax bills because of this one line. Find it before you write the offer, because it changes your monthly payment for years.

Where did Mello-Roos come from?

Proposition 13 passed in 1978 and capped the basic property tax at 1 percent of assessed value. That cap starved the old way of paying for new streets, sewers, schools and firehouses. Cities still needed to build them, so in 1982 the legislature passed the Mello-Roos Community Facilities Act, named for the two lawmakers who wrote it. You can read it at California Government Code section 53311 and the sections that follow.

The Act lets a city, county, school district or other local agency draw a boundary and call it a Community Facilities District. The district can sell bonds to build public facilities, then levy a special tax on every parcel inside the boundary until the bonds are repaid. Some districts also use the tax to fund ongoing services.

Forming a district takes a two-thirds yes vote. Here is the detail that explains everything else. When fewer than 12 registered voters live inside the boundary, the landowners vote instead, one vote per acre. On raw land, that voter is usually the developer. The builder approves the tax before a single family moves in, the bonds fund the infrastructure, and every future owner inherits the tax with the deed. That is why Mello-Roos lives almost entirely in newer developments.

How is Mello-Roos different from regular property tax?

The regular property tax is ad valorem, which means it is based on value. Proposition 13 caps it at 1 percent of assessed value, plus voter-approved debt. A Mello-Roos special tax sits outside that cap because voters inside the district approved it separately.

The bigger difference is how the amount is set. Mello-Roos is charged by a formula fixed when the district formed. Common formulas use the square footage of the home, the size of the lot, or a flat amount per parcel. The formula does not care what your house is worth. Your home's value can fall and the special tax does not fall with it. Many district formulas also allow the tax to rise each year, up to a stated maximum, so read the district's notice for both numbers.

On the bill itself, the 1 percent levy and the school bonds sit in the ad valorem section. Mello-Roos appears below them, in the direct or special assessments section, listed by district name with a phone number next to it. Call that number with your parcel number and the district office can tell you what the tax funds and when it ends.

How do I find out if a house has Mello-Roos before I offer?

Do not wait for escrow to surprise you. Check three places, and check the first one before you even tour.

The preliminary title report will also show the special tax lien on the parcel. Your agent can pull the tax bill on day one, and California's disclosure rules require the seller to tell you about the district under Civil Code section 1102.6b. Disclosure comes during escrow, though. The tax bill is public now, which is why we check it before our buyers offer.

How long does Mello-Roos last?

It depends on the district, and the honest answer lives in the Notice of Special Tax, which states the expiration date for that specific parcel.

The general shape: the Act caps any single bond at a 40 year term, and bond terms of 20 to 40 years are common. A tax that exists to repay bonds ends when the bonds are paid off. So a district formed in the 1990s may be near the end, while a district attached to a brand new project may run for decades.

Two cautions. A district formed to fund ongoing services, like maintenance or public safety, can keep charging with no bond payoff date at all. And a district can issue new bonds if the voters or landowners approve more projects. Never assume an end date. Read the notice, and call the district's number on the tax bill to confirm what remains.

Is Mello-Roos tax deductible?

Generally no, and this catches people who assume every line on the property tax bill is deductible.

The California Franchise Tax Board's position is that only ad valorem taxes, taxes based on the property's value, qualify for the real property tax deduction. Mello-Roos is charged by formula, so under that reading it does not qualify. On the federal side, the rules for assessments that fund local benefits like streets and sewers point the same direction, with narrow exceptions for portions that pay for maintenance or interest.

The line between deductible and not runs through your specific bill and your specific return. Hand your CPA the actual tax bill and the Notice of Special Tax and let them draw it.

Where is Mello-Roos common in Los Angeles and Ventura counties?

Follow the construction date. The Act became law in 1983, so neighborhoods built before then almost never carry a Mello-Roos tax, and a large share of the housing in our area was already standing by then.

It clusters where new homes went up after that: newer developments and master-planned communities, including newer projects in Ventura County and parts of the west Valley. Those parcels can also sit in a 1915 Act assessment district, an older cousin that works in a similar way and also shows up as its own line on the bill.

We will not print a list of specific districts here, because districts form, refinance and expire, and a stale list is worse than none. The lookup takes five minutes for any address. Do it per house, every time.

How does Mello-Roos change what you can afford?

It lowers the loan you can carry, because the lender counts the full tax bill inside your housing payment.

Run illustrative round numbers. Say a home carries $4,800 a year of Mello-Roos, which is $400 a month. At an illustrative 6.5 percent rate on a 30 year loan, $400 a month covers about $63,000 of loan balance. So that special tax quietly shrinks your purchase power by roughly that amount, or it shrinks what you save every month. Either way, it is real money and it belongs in your math from the first day.

Before you write an offer on any home in a district, put the full tax line into the buyer net sheet so you see the true monthly cost, and rerun your budget in Purchase Power with the real tax figure instead of a guess.

One honest limitation. A Mello-Roos tax is a fact about the parcel, and it is priced into the neighborhood to some degree. A newer community with the tax may also have newer schools, newer parks and newer streets, which is what the tax bought. The point of this article is knowledge before the offer. Whether the trade is worth it is your call to make, with the number in front of you.

This is not tax advice. Deductibility rules have exceptions and they change, so confirm your own treatment with your CPA. This is not legal advice either. The Notice of Special Tax and the purchase agreement are legal documents, and an attorney can review anything you are unsure about.