A couple sits down with their lender after finding a home they love in Dos Vientos. The list price matches almost exactly a home they toured the week before in a different tract, same square footage, same bedroom count, same asking price down to a few thousand dollars. Then the lender runs the numbers and the monthly payment estimates come back a few hundred dollars apart. Nothing about the house changed. What changed is the year the tract was built.
That gap has a name: Mello-Roos. And in Dos Vientos, the community that anchors the southern half of Newbury Park, it does not scale with the size of the house or the quality of the finishes. It scales with when the tract was built. Two homes priced identically can carry annual special tax bills that differ by thousands of dollars, and that difference follows the property for decades, not just the current owner.
Why Some Dos Vientos Tracts Carry This Charge At All
Mello-Roos is not a fee anyone negotiates. It is a special tax tied to a Community Facilities District, created under a 1982 state law that gave cities and developers a way to fund roads, sewers, and schools in new subdivisions after Proposition 13 capped the base property tax rate at 1 percent of assessed value in 1978. Once that cap was in place, local agencies lost the ability to raise general property tax revenue fast enough to build infrastructure for new growth. The workaround was to let a district issue bonds against future homeowners and repay them through an annual special tax billed alongside the regular property tax.
Dos Vientos was built in phases starting in the 1990s and the practice of financing infrastructure this way was already standard by the time ground broke. Every phase of the community carries some form of CFD assessment. What varies enormously is how much of that original bond is still outstanding.
Four Building Phases, Four Very Different Tax Bills
Dos Vientos is not one subdivision. It is roughly 4,000 homes spread across more than two dozen tracts, built out over three decades and still not finished. Each phase used a different bond issue, and each bond has its own payoff schedule.
| Phase | Rough Era | Builders | Typical CFD Range | Years Remaining |
|---|---|---|---|---|
| Phase 1 | Late 1990s into early 2000s | Original master developer | Near or past payoff, some under $800/year | Little to none |
| Phase 2 | Early to mid-2000s | Multiple production builders | Moderate, declining | Roughly a decade or less |
| Phase 3 | 2009 to 2018 | Toll Brothers, Shea Homes | Higher, newer bonds | 20-plus years |
| Phase 4 | 2019 to present | Toll Brothers, Lennar | $2,500 to $4,500 per year | 35 to 40 years |
The Phase 1 tracts are the oldest homes in the community, and their original infrastructure bonds are close to retired. A buyer looking at one of those resales today may see a CFD line item under $800 a year, which is close to negligible against a seven figure purchase. Walk two streets over into a Phase 4 tract where Toll Brothers or Lennar closed a home in the last few years, and the bond that paid for that tract's streets and utilities was issued between 2019 and 2023. Those assessments run $2,500 to $4,500 annually and won't be paid off for another three to four decades.
What The Gap Actually Costs Every Month
A $3,500 annual CFD charge, which sits in the middle of the Phase 4 range, adds close to $290 a month to the real cost of owning that home. A Phase 1 resale with an assessment under $800 a year adds closer to $65 a month. That is roughly a $225 monthly gap between two homes that might list within a few thousand dollars of each other.
This is not a rounding error a lender waves off. Mello-Roos is billed on the same secured property tax statement as the base 1 percent rate, and it counts against a buyer's debt-to-income ratio the same way the base tax does. Unlike the base rate, it is not tied to assessed value, so it does not shrink if the market softens and it does not follow the standard 2 percent annual cap that governs the Prop 13 portion of the bill. It is a fixed obligation set by the bond documents, and it rides with the property until the bond retires or the loan gets refinanced around it.
For a household budgeting against a specific monthly number, on a Dos Vientos home priced near the $1.54 million median recorded in June 2026, whether the CFD line reads $65 a month or $290 a month can be the difference between qualifying at the price they want and needing to adjust the offer.
The Tracts You'll Actually See On A Listing Sheet
Names like Cielo Real, Aldea, Villa Serrano, and Estancia show up constantly on Dos Vientos listing sheets, and each one sits within a specific phase, which means each one carries that phase's tax profile. HOA dues follow a similar pattern. Phase 1 and Phase 2 tracts typically run $150 to $250 a month. The gated Phase 3 and Phase 4 communities, with more amenities and newer landscaping to maintain, run $300 to $400 a month. Stack a higher HOA on top of a higher CFD and the monthly gap between an older resale and new construction widens further, even before principal and interest enter the picture.
The community's shared amenities, including the Conejo Recreation and Park District's Dos Vientos Community Center with its ballfields, tennis courts, and preschool programs, serve residents across every phase regardless of which tract they bought into. Schools work the same way. Sycamore Canyon Elementary sits inside the community and serves most of it, with some tracts feeding Maple Elementary, and the whole area is served by Sequoia Middle School and Newbury Park High School. None of that changes based on which phase a home sits in. The tax bill does.
Where This Surfaces At Escrow And What To Ask For
Here is the friction point that catches buyers off guard. When a home is sold as new construction, the builder is required to provide a Public Report that discloses the CFD upfront, so there is no ambiguity. Resales work differently. No Public Report is required on a resale, which means the exact amount and remaining term of the Mello-Roos assessment is not always sitting in plain view on the listing.
California law still requires the seller to disclose it. Civil Code section 1102.6b obligates a seller to provide a Notice of Special Tax when a property carries a continuing lien for Mello-Roos, and that notice has to identify the district, the current tax amount, and how it was calculated. In practice, the cleanest way to confirm the number before writing an offer is to request the seller's actual secured property tax bill and look for the separate CFD or special tax line item. A generic tax estimate on a listing sheet, calculated off the base 1 percent rate alone, will not capture it.
Comparing Two Listings Apples To Apples
Before treating list price as the number that matters, it helps to run a short comparison on any two Dos Vientos homes under serious consideration.
- Pull the actual current tax bill for each property, not an estimated rate off the listing sheet
- Confirm which phase and tract each home sits in, since that alone predicts the CFD range
- Ask for the years remaining on the bond, since an assessment five years from payoff behaves very differently than one with three decades left
- Add HOA dues to the CFD figure to get a true monthly carrying cost beyond principal and interest
- Request the Notice of Special Tax disclosure directly rather than relying on a summary
Two homes that look identical on price can land in very different places once this math is done, and the difference is invisible until someone goes looking for it.
A Few Questions Worth Asking Before You Write An Offer
Does the Mello-Roos assessment ever go away? Yes. It ends when the underlying bond is paid off, which is why Phase 1 tracts carry such a small charge today. The bond term is set when the district is formed, typically running several decades from issuance.
Is the assessment tax deductible? Generally not the portion that financed new construction, since it is not based on assessed value the way the standard property tax is. A portion tied to ongoing maintenance or services may qualify, and that distinction is worth a conversation with a tax professional rather than a guess.
Does every home in Dos Vientos carry one? Every phase built so far does, though the amount and years remaining differ sharply by phase and tract. The only way to know the figure for a specific address is to pull that property's own tax bill.
If you're comparing homes across Dos Vientos, or trying to decide whether an older resale or new construction makes more sense for your budget, this is exactly the kind of detail worth working through before you fall in love with a floor plan. Aimee McKinley pulls the actual tax bill and disclosure package on every Newbury Park property her clients consider, so the number you plan around is the real one. Request a free home valuation to start the conversation.
