Aaron Knutson · July 22, 2026
Every agent working Placer, Sacramento or Orange County has taken this call. It lands about four months after closing, and it starts with some version of: there is a bill here I do not understand.
Usually it is the supplemental tax bill. Sometimes it is a Mello-Roos line nobody walked through at the kitchen table. Sometimes it is an electric bill that came in twice as heavy as the one they had two zip codes over, because they moved from a SMUD address into PG&E territory and nobody mentioned it.
It is an uncomfortable call, and it is almost never the agent’s fault. The process simply was never built to show a buyer the complete cost of owning a specific house before they write the offer. The listing shows the price. The lender shows the loan. The county publishes a tax rate. The utility publishes a rate schedule. Nobody hands the buyer the total.
HiddenHomeCost was built to close that gap — and agents can now set up a Pro account on it.
You paste in an address. It pulls parcel-level data for that specific property — county tax records, the community facilities district it sits in, the utility that actually serves it, CAL FIRE hazard mapping — and builds the full monthly cost stack, plus what those extras add up to over a thirty-year hold. Every figure is labeled with its source and its rate date rather than presented as a magic number.
It covers Placer, Sacramento and Orange counties today, and it scores each property from 1 to 10 so two houses can be compared on what they cost to own, not just what they cost to buy.
More on the thinking behind it here: Why HiddenHomeCost exists.
Your branding on the report. Set up your profile with your name, headshot and brokerage logo, and the shareable true-cost report goes out looking like your work. Because it is — you ran it, you are the one walking your buyer through it.
Side-by-side comparisons. Two listings your client is torn between, priced the same, ten minutes apart. One sits in a CFD and a PG&E pocket. The other does not. That is a real conversation you can now have with a document instead of a hunch.
Control over what else appears. A lender co-brand block is off by default. If you want it on a particular report, you turn it on. If you never want it, you never turn it on.
Fewer month-four calls. A buyer who saw the supplemental bill coming does not call you about it in a panic. They call you next time they move.
It is a research tool, not an appraisal and not a quote. It shows what the county, the utility and the fire maps say about a parcel, clearly labeled, so you and your client can go verify anything that matters. It will not price a loan and it does not pull credit.
The agents who are good at this market already know which neighborhoods carry an assessment and which ones sit on the expensive side of a utility line. This just puts it on paper, parcel by parcel, in front of the buyer, at the point in the deal where it still changes something.
Cali Mortgage
Ready to talk it through?
Aaron gives you the straight answer — no pressure, no jargon.