Free DIY, flat-fee tools (including ours), and full-service firms — with an honest “choose this if” for each, including the ones that aren't us.
All five get you to the same place — comparable sales evidence in front of your county — at very different prices and effort levels.
Choose this if: You have the time and enjoy this kind of work. Every California county Overassessed serves offers a free informal review, and it works — the hard part is assembling credible comparable sales with documented adjustments.
Worth knowing: The failure mode isn't rejection, it's weak evidence: raw Zillow links and asking prices don't move a county appraiser.
Choose this if: You're comfortable submitting one form yourself and want professional-grade comps, adjustments, and copy-paste filing instructions without giving up a share of your savings. California-only by design.
Worth knowing: We don't file for you or attend hearings. If the county denies the appeal outright, the fee is refunded under our outcome guarantee.
Choose this if: You want a California-specific flat-fee package and don't need a personalized case analysis or cover letter.
Worth knowing: Roughly double our price for a package without a tailored case narrative.
Choose this if: You want hands-off filing at a known flat price and your property is in their coverage area.
Worth knowing: A national tool — California's Prop 8/Prop 13 specifics are not its center of gravity.
Choose this if: You will not file anything yourself, you own multiple properties, or your case is headed to a formal hearing and you want representation.
Worth knowing: Enrollment renews automatically each year — the fee recurs in any year they win savings until you cancel.
Competitor pricing reflects each service's published rates as of 2026-06-09 and can change. Deep dive on the contingency model: Ownwell vs. Overassessed.
1. Are you actually overassessed? Settle this first, for free — if your assessed value is already below market value, every option above is a waste of money, including ours.
2. Will you spend 15 minutes filing a form? If yes, the flat-fee path keeps 100% of your savings minus a one-time fee. If genuinely no, a contingency service that files for you beats a guide you never use.
3. Is your case unusual? Headed to a contested formal hearing, a complex property, or a multi-property portfolio — that's where full-service firms and property tax agents earn their percentage. For a typical single-family decline-in-value case, the informal review resolves most situations without any hearing at all.
There's no single best — there's a best order of operations. Start with the free check of whether you're overassessed at all. If you are, the cheapest effective path is a flat-fee evidence package plus the county's free informal review, which you file yourself in 10–15 minutes. Full-service firms like Ownwell or TaxProper make sense if you genuinely won't file anything yourself, you own several properties, or you need representation at a formal hearing. Paying 25–35% of your savings every year purely to avoid one short form is the most expensive way to solve this problem.
Only if you're actually overassessed — which is why every credible service starts with a free check. If your assessed value is below your home's market value, no service can save you anything, and an honest one will tell you so. If you are overassessed, typical California savings run $1,000–$3,000 per year, so even the most expensive service usually pays for itself; the question is how much of that saving you keep.
Three pricing models exist. Free: your county's informal review (you do all the work). Flat fee: roughly $45–$149 one-time for evidence packages or filing services. Contingency: 25–35% of your savings per year for full-service firms, with no upfront cost and nothing owed if they don't win a reduction. On a typical $2,208 annual saving, that's $0, about $45–$149 once, or $552–$773 every year, respectively.
No. The informal review is a free public process designed for homeowners, and the formal appeal (form BOE-305-AH) doesn't require a lawyer or agent either — the state Board of Equalization confirms you can represent yourself. Services exist because the evidence is the hard part: finding the right comparable sales, adjusting them credibly, and presenting the numbers the way the assessor's office expects.
Find out whether you're overassessed — free, no account, about 60 seconds. Then pick whichever path fits.
Get a reduction or get your $45 back — if you choose us at all.
Competitor names are trademarks of their respective owners; Overassessed is not affiliated with any service listed. Pricing and terms reflect each service's published materials as of 2026-06-09 and may change — confirm current terms before signing up with anyone, including us. Overassessed provides estimates based on publicly available data and AI-generated analysis. This is not a formal appraisal, legal advice, or tax advice. Results are not guaranteed, and appeal outcomes depend on county review.