SavePropTax is a small team in San Ramon, California, building software that helps homeowners pay what is fair.
We did it because a neighborhood works when people pay what is fair. When you are taxed on more than your home is worth, the difference comes out of everything else. It results in the repair you put off, the trip you skip, the quiet math you redo every month. Some families carry it for years. Some finally leave a place they meant to stay in.
California already gives you an answer to that: ask your county to review the assessment. It is free, it is your right, and almost nobody uses it. Not because homeowners do not care, but because it means hunting down comparable sales, matching them to your home, filling out a county form, and doing all of it before a deadline you were never told about.
We turned that afternoon into thirty seconds.
True to our mission, we make the comparables, our reasoning behind the picks, and the adjustments free to see. You can choose to pay us to automate the filing end to end or do it yourself on the county website for free.
$29, flat, and only if you file. The check is free.
We never take a share of your savings, and we think most homeowners should never pay 30 to 40 percent to anyone. Those firms are priced to argue your case at a formal hearing. For most people it never gets that far: the informal review ends it, decided at a desk on the evidence you send, with no hearing at all. Charging a third of your savings for a form, the right sales, and a deadline is charging hearing rates for paperwork.
Our work is the same whether you save $500 or $5,000, so our price is too.
The county's appraiser will judge your request by one standard: closely comparable, arm's-length sales, adjusted to your home under the state's rules. So that is exactly how we build it.
We pull recorded sales from county records near your home, sold close to the January 1 valuation date and never later than March 31, the legal cutoff. Foreclosures, family transfers, and other non-market sales are screened out before anything else happens.
Then a Large Language Model (AI) applies the Board of Equalization's Assessors' Handbook and Publication 30 to your specific home: matching on size, bedrooms, build quality, and condition, adjusting each sale's price toward your home step by step, and discarding any sale a desk reviewer could fairly challenge. It is the same rulebook the county uses, applied before you ever pay.
The result is deliberately simple: your value is the median of the sales we show you, the exact sales printed on your county form. No averages, no black box, and you can swap or remove any comparable before anything is filed.
We are deliberately conservative: you can only file through us when the sales evidence supports a genuine case.
Fewer than one in four homes we check qualify. When the sales near you do not support a lower value, we say so and tell you not to file. You keep your $29.
A weak request wastes your time and your assessor's. We would rather earn nothing than send one.
Madrone Technologies, Inc. is a Delaware corporation based in San Ramon, California. Write to support@saveproptax.com and a person answers.
We prepare your request from public records and your county's own form. You read it, and you sign it. Your assessor decides your value. We make sure they are asked.
SavePropTax is a document preparation service. We are not a law firm, we do not give legal or tax advice, and we are not affiliated with any government agency. Estimated savings are estimates, and reductions are decided solely by your County Assessor.