A buyer touring Dougherty Valley this summer put two comparable townhomes side by side, both listed within a few thousand dollars of each other, one in Gale Ranch, one in Windemere. The Windemere listing had no HOA line item. On paper, that read as the better deal. Then the loan estimate came back, and the "no HOA" home carried a higher monthly housing cost than the one with dues. The lender had folded a Mello-Roos special tax into the payment, and it moved more than the HOA fee it was supposed to be replacing.
That surprise is not a fluke of one address. It is the predictable result of a fork Dougherty Valley took decades ago, when its two largest master-planned neighborhoods financed their infrastructure through two different mechanisms. Understanding that fork changes how you should compare these listings, and it matters more than most buyers assume before they get a loan estimate in hand.
Same era, two different financing choices
Gale Ranch and Windemere both sit within the Dougherty Valley Specific Plan, adopted by the Contra Costa County Board of Supervisors in 2005 and later amended by the City of San Ramon in 2014. Both are built out with parks, schools, and trail networks. Where they split is in how that infrastructure got paid for.
Gale Ranch is organized as a traditional homeowners association covering seven distinct neighborhoods: Avanti, Belvedere, Coronado, Gallery, Monarch, Solaire, and Terravista. The association collects monthly dues that fund a clubhouse, pool, common-area landscaping, and a shopping center anchored by a grocery store along the commuter corridor. It also sits inside the boundary of the Dougherty Valley Geological Hazard Abatement District, a separate public entity the City of San Ramon manages that is responsible for the open-space hillsides surrounding the community. That is a third layer worth knowing about before you assume HOA dues cover everything a hillside development touches.
Windemere took a different route. Instead of an HOA, its infrastructure and ongoing services (street sweeping, park and median landscaping, street lighting, and the local library and community center) are funded through a Community Facilities District, better known by its statutory name, Mello-Roos. There is no monthly dues statement. Instead, the charge shows up as a line item on the county property tax bill.
The mechanism that makes this comparison misleading
Here is where the "no HOA" assumption breaks down. Proposition 13 caps the base, value-based property tax rate at 1% of assessed value, with annual increases limited to 2%. That cap applies to ad valorem taxes, meaning taxes calculated from what the home is worth. A Community Facilities District tax is not ad valorem. It is a special assessment tied to the parcel and set by a bond formula, and it sits entirely outside the Prop 13 ceiling. The Southern California Association of Governments describes CFDs as flexible in both basis and application, precisely because the only real constraint on the tax is that it be reasonable, not that it track home value.
That is the legal reason a no-HOA neighborhood can carry a higher effective tax rate than an HOA neighborhood next door. The HOA dues are optional in the sense that the association sets them and residents vote on budgets. The Mello-Roos charge is not optional, does not shrink if the market softens, and is not something the seller can simply choose to stop paying.
What the rate spread actually looks like
Contra Costa County homeowners generally pay a combined effective property tax rate between 1.10% and 1.40% of assessed value. In Mello-Roos communities, including Dougherty Valley in San Ramon and parts of Danville, that effective rate can climb to 1.50% or higher once the special tax is layered on top of the base rate. Agents who work both Gale Ranch and Windemere regularly cite figures in roughly that range for each community specifically, putting Gale Ranch closer to 1.4% and Windemere closer to 1.7%.
Run that spread against a $900,000 purchase price and the gap is real money, not rounding error. A 1.4% effective rate works out to $12,600 a year, or $1,050 a month. A 1.7% rate on the same price works out to $15,300 a year, or $1,275 a month, a difference of $225 a month before either community's other charges are counted. Add back Gale Ranch's HOA dues, which cover the pool, clubhouse, and landscaping across its seven neighborhoods, and the total monthly gap between the two communities narrows considerably, sometimes to the point where the "no HOA" home costs about the same or more once everything is on the table.
The exact number depends entirely on the parcel. Dougherty Valley is one of the areas where multiple overlapping Community Facilities Districts can apply to a single property, so two homes on the same street can carry different special tax totals depending on which phase and builder financed that block.
The absence of a monthly HOA statement is not evidence of a lower carrying cost. It just means the charge moved to a different piece of paper.
What to actually check before you write an offer
A rate range is useful for narrowing a search. It is not a substitute for the number on a specific parcel. Before comparing two listings on a monthly-cost basis, pull these for each address:
- The current county property tax bill, which lists any Special Tax or CFD line item by name and shows the annual amount for the current year
- The preliminary title report, which references the recorded Notice of Special Tax and points to the Rate and Method of Apportionment, the document that sets how the charge is calculated, how it escalates, and when it ends
- For new construction, the developer's required Mello-Roos disclosure, which states the current tax, the maximum authorized tax, and the CFD's expiration date
- The HOA's most recent budget and reserve study, if you are comparing against a dues-based community, so you know what the monthly fee is actually funding beyond landscaping
Escalation matters here too. Many CFD formulas allow the special tax to increase by a set percentage each year, commonly in the low single digits, which compounds over a mortgage term the way HOA dues rarely do at the same pace. Bonds also have maturity dates, so a CFD that funded a specific phase of Windemere's build-out will eventually retire, at which point the tax on that parcel drops. Ask for that end date. It is recorded, and it is one of the few numbers on this whole comparison that does not require an estimate.
Beyond the tax bill
None of this changes what either community actually offers day to day. Windemere's hillside streets connect directly to the Windemere Ridge Trail and the Rolling Hills Trail, with trailheads near Windemere Ranch Middle School along East Branch Parkway and Bollinger Canyon Road. Gale Ranch's flatter, more open layout puts its seven neighborhoods within walking distance of its own parks and the shopping center along the commuter corridor. Families comparing the two are often weighing terrain and layout as much as financing structure, and that is a reasonable way to make the final call once the monthly numbers are actually apples to apples.
FAQ
Is Mello-Roos tax deductible like regular property tax? Sometimes only in part. A portion may qualify if it funds ongoing maintenance or services rather than new construction, but the burden is on the homeowner to document that share, and many California households have already reached federal deduction limits through base property tax and state income tax alone. Confirm the specific structure with a tax professional before assuming any deduction.
Does a Mello-Roos charge ever go away? Yes, when the bonds that created it are paid off, which is set at formation and recorded in the district's documents. Some CFDs also fund ongoing services rather than bond debt, in which case the charge can continue indefinitely under the district's own rules.
If a listing doesn't mention Mello-Roos, does that mean there isn't one? Not reliably. Seller knowledge on older CFDs is sometimes incomplete, and the charge does not always get flagged clearly in an MLS listing. The county tax bill and the preliminary title report are the two sources that settle it.
Is the HOA-free community always the better financial choice long-term? Not automatically. A CFD tax does not shrink if property values fall the way a percentage-based tax might, and it can escalate on its own schedule regardless of the market. An HOA-based community's dues are subject to board votes and periodic increases too, so the comparison has to be run on the actual numbers for the specific parcel, not on the presence or absence of a monthly statement.
Comparing Gale Ranch and Windemere on price per square foot alone will always miss what actually shows up in a monthly payment. If you are weighing Dougherty Valley against the rest of San Ramon, or trying to read a specific parcel's tax structure before you write an offer, the Khrista Jarvis Team can walk the numbers with you. Schedule a complimentary white-glove consultation and bring the address.
