Mello-Roos in the Bay Area

How Mello-Roos Works

Mello-Roos comes from the California Mello-Roos Community Facilities Act of 1982, named after the two legislators who wrote it, Henry Mello and Mike Roos. The law lets a local government form a Community Facilities District (CFD), a special taxing zone drawn around a new development, and issue bonds to pay for infrastructure: schools, parks, roads, public-safety facilities, water and sewer lines.

Those bonds are borrowed money, and the people who buy the homes in that zone pay the debt back. Each parcel inside the CFD carries an annual charge, layered on top of the standard property tax, until the bonds are paid off.

This is where many buyers get surprised. Proposition 13 (Prop 13) caps the base property-tax rate at 1% of a home's assessed value. Mello-Roos is not capped by that rule, because it is not an ad-valorem tax. An ad-valorem tax is one calculated from the assessed value of the property; the 1% base tax is ad-valorem, so it rises and falls with value. Mello-Roos is a special assessment instead, a fixed per-parcel charge set by the bond, not by what your home is worth. So it sits outside the Prop 13 cap entirely.

Mello-Roos is only one line on your tax bill, so it helps to see how your overall California property tax is calculated before you weigh what a CFD adds.

What Mello-Roos Costs

In Bay Area tracts that carry it, the charge typically runs about $1,500 to $4,000 per year per parcel. That works out to roughly $125 to $333 per month, on top of the regular property tax.

The range is wide because each tract is different. The size of the original bond, the number of homes sharing the debt, and whether more bonds were later added all change the number. At the high end, the largest master-planned districts (parts of Mountain House, some of San Ramon's Dougherty Valley) can reach $5,000 to $10,000 or more a year. Two homes a mile apart can carry very different charges.

That is why the figure has to be read off the specific property, not estimated from the neighbourhood. The exact charge is fixed per parcel and recorded on that home's title report, known in the trade as the prelim (the preliminary title report). Treat any area range as a planning number only. The real figure comes off the prelim, and this page is general information, not tax advice.

For a buyer, the practical effect is on the monthly payment. A $3,000 annual charge adds $250 a month to your housing cost, every month, for the life of the bond. In the largest districts a $9,000 charge would add $750 a month. Either way it belongs in your budget from the start, not after the offer.

Which Bay Area Areas Have Mello-Roos, and What It Costs by City

Mello-Roos follows large new-construction, master-planned development. In the Bay Area, that means the East Bay and the nearby Central Valley far more than the urban core.

These are planning ranges for parcels that actually carry a Community Facilities District (CFD), not city averages, and every parcel's exact charge still has to be verified off its own title report.

Ranges as of mid-2026. These are planning ranges for parcels that carry a CFD, and the exact charge on any given home has to be verified off its title report. General information, not tax advice.

Dublin

Dublin is the most common place Bay Area buyers meet Mello-Roos, mainly in the newer East Dublin single-family home tracts, which sit across three city Community Facilities Districts (CFDs). Plan on roughly $1,500 to $4,000 a year per parcel that carries a CFD, though some parcels come in under $1,000 and some run over $4,000. The exact charge is fixed per parcel and has to be read off that home's title report, so treat this as general information, not tax advice.

San Ramon

In San Ramon, the charge concentrates in the Dougherty Valley area, including the Gale Ranch neighbourhood. A rough planning range is $1,500 to $4,000 or more per year per parcel, but many parcels here carry more than one overlapping Community Facilities District (CFD), so the charges stack and each CFD has to be checked separately. Verify the specific parcel off its title report; this is general information, not tax advice.

Brentwood

Brentwood's Mello-Roos shows up in the newer Contra Costa County subdivisions rather than the older parts of town. For parcels that carry a Community Facilities District (CFD), plan on roughly $1,200 to $3,500 a year. The exact figure is fixed per parcel and read off the title report, so use this only as general information, not tax advice.

Oakley

Oakley is much like neighbouring Brentwood: the charge turns up in the newer Contra Costa County subdivisions, not the established housing. Budget roughly $1,200 to $3,500 a year on parcels that carry a Community Facilities District (CFD). Confirm the exact charge off the specific parcel's title report, and treat this as general information, not tax advice.

Mountain House

Mountain House is the one genuinely high-end area for Mello-Roos in the region, a master-planned community where the charge varies widely by phase and Community Facilities District (CFD), with its newest district formed in 2024. Annual charges run a broad $2,000 to $10,000 or more per parcel, so the phase you buy in matters a great deal. Because the variance is so high, verify the exact charge on the specific parcel and phase off the title report; this is general information, not tax advice.

Tracy

Tracy carries Mello-Roos mainly in its newer tracts, though the data here is more limited and the numbers are best treated as an estimate. A rough planning range is $1,000 to $3,500 a year per parcel that carries a Community Facilities District (CFD). As everywhere, confirm the exact charge off the parcel's title report, and read this as general information, not tax advice.

Livermore

Livermore carries Mello-Roos only on newer construction, with no reliable typical band, so any charge there has to be verified per parcel off the title report. Treat this as general information, not tax advice.

Pleasanton

Pleasanton has mostly none, with what little exists being largely legacy, so on most Pleasanton homes Mello-Roos is not a factor. Either way, confirm the specific parcel rather than assuming from the city.

Where it is largely absent is just as useful to know. San Francisco, the Peninsula, and most of the South Bay do not carry meaningful Mello-Roos, because they have little master-planned new construction at this scale. Mello-Roos pays for the infrastructure of brand-new neighbourhoods, and those areas were built out long ago. If you are buying older housing stock in an established part of the region, Mello-Roos usually is not a factor. If you are buying new construction in the East Bay or out toward the valley, assume it is until you have confirmed otherwise.

How to Check for Mello-Roos Before You Write the Offer

Here is the order to work in, so you find the charge before your offer instead of after. Each CFD bond has a finite term, typically 20 to 40 years from issuance, and the sunset date is the year the charge ends once the bond is paid off, so the two facts to leave with are the annual charge and the date it stops.

1. Pull the preliminary title report. Ask for the preliminary title report, known in the trade as the prelim. It is the document the escrow officer (the neutral third party who handles the paperwork and money during the sale) produces while the contract is being executed, and it lists what is recorded against the property.
2. Find the special-tax and CFD lines. On the prelim, look for the special assessments: any Community Facilities District (CFD) or special-tax line items recorded against the parcel. These sit above the standard 1% base property tax and are where a Mello-Roos charge appears.
3. Read the annual charge and the sunset date. For each CFD line, note two things: the annual per-parcel charge, and the sunset date. The sunset date is the year the charge ends once the bond is paid off, so it tells you how long you will be paying.
4. Check for more than one bond. Do not stop at the first line. Some tracts issue additional bonds during the original term, which can extend the timeline or layer a second charge on top of the first. Read every issuance recorded against the parcel, not just one.
5. Get the current-year special-tax bill. Ask the seller or the listing agent for the current-year special-tax bill on the property. It confirms what the parcel is actually being charged this year, rather than an estimate from the neighbourhood.
6. Model the charge into your monthly payment. Before you write the offer, have your agent fold the annual charge into your monthly cost, so you are comparing homes on their true carrying cost and not just the listing price.

Mello-Roos vs. School-District Parcel Taxes

Both Mello-Roos and a school-district parcel tax appear on the tax bill as "special assessments" sitting above the 1% base rate, so they are easy to confuse. The mechanisms are different.

A school-district parcel tax is a flat charge, usually $300 to $800 per year, approved by a two-thirds vote of the district's residents to fund local schools. It applies broadly across the district, old homes and new alike, and it is modest.

Mello-Roos is bond debt tied to a specific new development, often many times larger, and it exists only inside the CFD that issued it. When you see "special assessment" on a bill, that is the first clue to look closer, but it does not by itself tell you which of these two you are looking at, or how large the charge is. The prelim does.

How Lily Garipova Protects Buyers From the Mello-Roos Surprise

The canonical failure with Mello-Roos is one of timing. Buyers discover the charge when they read the prelim, and by then they may have already removed their contingencies, the conditions that let them back out. Buyers in Dublin Boulevard new-construction run into this regularly: the home pencils out on the listing price, the offer is accepted, and only afterward does a $3,000-a-year charge appear on the title report. At that point the choice is narrow: absorb a cost you did not plan for, or walk away and risk your earnest money (the good-faith deposit, often 1 to 3% of the price, that you put down with the offer to show you are serious).

Lily Garipova works the problem in the opposite order. She checks for Mello-Roos before the offer goes in, reads the prelim, and identifies the per-parcel charge, the sunset date, and any additional bond issuances. Where it is warranted, she can build a property-tax-research contingency into the offer: a written condition that gives you a defined window to verify the full tax picture and withdraw with your earnest money protected if the numbers do not work. That is a fourth contingency, added alongside the three standard ones, the inspection contingency, the appraisal contingency, and the loan contingency.

With that groundwork done, a buyer who finds Mello-Roos at the table has real options instead of a trap:

1. Walk away with earnest money retained, if the property-tax-research contingency was written into the offer.
2. Accept the home and adjust the monthly cost projection to include the charge, going in with eyes open.
3. Negotiate a price reduction equal to the present value of the remaining payments, so the seller absorbs part of the cost.
4. Walk away and forfeit the earnest money, the only exit left if no contingency was in place to protect you.

The first three are available because the work was done before the offer. The fourth is what happens when it was not.

This is where local concentration matters. Across 104 documented closings and more than $115M in total volume, 91 of them on the buyer side, Lily's transaction history is concentrated exactly where these tracts are: 33 closings in Alameda County, including Dublin, and 21 in Contra Costa County, including Brentwood. She has been in real estate since 2007 and California licensed since 2016 (Cal DRE #02010731), and she works with clients in English and Russian.

Every property is different, and the only reliable Mello-Roos figure is the one read off your specific prelim. If you are looking at new construction in the East Bay or anywhere these charges turn up, reach out before you write the offer and we will check the tax picture together.

Mello-Roos FAQ