2026-09-23 · 4 min read · Dublin

What Is Mello-Roos, and Why Is Your Tax Bill Higher Than Your Neighbor's?

The wood framing of a home under construction

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You compare notes with a neighbor a few streets over, and their property tax bill is hundreds or even thousands of dollars less than yours, even though your homes are worth about the same. The difference usually isn't a mistake. It's Mello-Roos.

We're Jameel Batshon and Ramez Bahu with Cornerstone Real Estate Team. Here's what it actually is, what it costs, and why it shows up so often in Dublin's newer neighborhoods.

What Mello-Roos Actually Is

Mello-Roos comes from a 1982 California law that lets local governments form a Community Facilities District, or CFD, to fund infrastructure for new development. The district sells bonds to pay for things like roads, sewer lines, parks, schools, and fire stations, and then levies a special tax on homes inside that district to pay the bonds back.

It's not a penalty and it's not random. It's how a lot of newer California communities, including large parts of East Dublin, got built without waiting decades for the county to fund the infrastructure on its own.

Tax forms, a phone calculator and a cup of coffee on a desk — Photo: Tax paperwork

What It Actually Costs

This is where it varies a lot, which is exactly why two homes of similar value can have very different bills. Statewide, typical annual Mello-Roos amounts run anywhere from a few hundred dollars in smaller or older districts to well over $10,000 a year in large, newer, infrastructure-heavy developments, with most buyers in active CFDs paying somewhere between $1,200 and $6,000 a year on top of their base property tax.

In dollar terms against the purchase price, a resale home without a CFD typically runs an effective property tax rate around 1.1% to 1.3%. A newer home inside a CFD can push that effective rate up to 1.5%, sometimes as high as 1.7% or more, depending on how much infrastructure that specific district financed.

How Long It Lasts

Mello-Roos isn't permanent, but it isn't short either. Most CFD bonds are structured to run 20 to 40 years from when the district was formed, and the special tax expires once those bonds are paid off. If you're buying into a newer Dublin development, it's worth finding out how far into that timeline the current CFD actually is, not just that one exists.

Mello-Roos vs. HOA Dues: Two Different Things That Often Show Up Together

These get confused constantly, so here's the actual difference:

Mello-Roos is a public tax. It shows up on your county property tax bill, funds public infrastructure, and eventually expires when the bonds are paid off.
HOA dues are a private fee. They're billed separately by the homeowners association, fund private amenities like pools, clubhouses, or gate security, and never expire as long as you own the home.

Neither one is typically tax-deductible. Mello-Roos isn't based on your property's value, so it doesn't qualify as a deductible ad valorem tax the way your base property tax does, and HOA dues on a personal residence aren't deductible at all. Lenders, though, count all three, your base property tax, Mello-Roos, and HOA dues, as part of your monthly housing cost when they calculate what you qualify for. That matters if you're budgeting to the edge of your pre-approval.

A neighborhood of homes seen from above — Photo: A neighborhood from above

Why This Comes Up So Often in Dublin

A lot of East Dublin's newer neighborhoods were built exactly the way Mello-Roos is designed for, new infrastructure, new schools, new parks, financed through a CFD instead of waiting on the county. That's part of why newer construction here can carry a noticeably higher tax bill than an older home a few miles away in West Dublin, even at a similar price point. It's not a flaw in the newer home. It's the tradeoff for the newer infrastructure.

How to Actually Check Before You're Under Contract

You're legally entitled to a Notice of Special Tax before you close, which has to spell out the CFD's name, the current annual tax, the maximum it's allowed to reach, how much it can increase per year, and the date it expires. Don't wait for that disclosure to be the first time you see the number.

Ask early: is this property in a CFD, what's the current annual amount, and how many years are left on it. That's a five-minute question that can change your monthly budget by hundreds of dollars.

We're real estate agents, not tax professionals, so treat this as the questions to bring to your lender and your tax advisor, not a substitute for either one.

Talk to Us About Your Situation

Looking at a newer home in Dublin and want the real Mello-Roos and tax numbers before you write an offer? Reach out. We'll pull the actual CFD details for that specific property.

Talk to Cornerstone Real Estate Team about your situation, or call 925-203-5672.

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