Own Luxury Homes®
Are You Overassessed? Property Tax Self-Assessment
51%+ of TX homes overassessed (Realtor.com); 40%+ nationally (NTU Foundation). 3 checks in 15 min: (1) Property Record Card accuracy; (2) Comparable sales — if comps 5%+ below assessed value: file; (3) Assessment ratio vs neighbors for uniformity appeal. Highest risk 2026: Tampa (−10% YOY), DC (−6.1%), Austin (−8–12%), Boise — corrections lagging assessments 1–2 years. Recent purchase below assessed value: closing disclosure IS the evidence. $539/yr median savings; $5,390 over 10 years. Own Luxury Homes® 12-Point Agent Integrity Audit™ — CMA data reveals overassessment.
Are You Overassessed? How to Tell if You’re Paying Too Much in Property Taxes in 2026
Most homeowners look at their property tax bill and feel powerless. It goes up every year, the number seems arbitrary, and the appeal process sounds like a bureaucratic maze. But the data tells a different story: most homeowners who look at their assessment critically find it’s wrong. Not slightly wrong. Wrong enough to file and win. This page gives you the specific checks to determine in 15–20 minutes whether you’re overpaying — and what to do about it.
The 5 Situations Where You’re Almost Certainly Overassessed
| Your Situation | Overassessment Risk | Why | Immediate Action | ||||||
|---|---|---|---|---|---|---|---|---|---|
| You’re in a market that peaked 2022–2023 and has since corrected | VERY HIGH | Assessments lag corrections by 1–2 years; peak-era assessment still on record while prices fell | Pull 3–5 recent comps; compare to your assessed value; if comps are lower: file | ||||||
| You recently bought your home at below the assessed value | HIGH | Your purchase price IS the market evidence; if you paid less than the assessed value, you paid the market clearing price | File with your closing disclosure as primary evidence; your purchase price = market value | ||||||
| Your property has deferred maintenance or condition issues | HIGH | Mass appraisals assume average condition; issues not accounted for | Document with photos + contractor estimates; condition appeal often produces 5–15% reduction | ||||||
| Your Property Record Card has an error (wrong sqft, beds, etc.) | HIGH — guaranteed if error confirmed | Legal error in assessment; boards must correct | Report directly to assessor’s office; often corrected without formal hearing | ||||||
| Your assessment ratio is higher than neighbors’ | MODERATE–HIGH | Unequal assessment; you’re bearing disproportionate tax burden | Pull neighbors’ assessed values and recent sale prices; calculate ratios; if yours is higher: uniformity appeal | ||||||
| Your market is flat or declining but your assessment increased | MODERATE | Assessment increase not supported by market data | Pull comps; if market data supports a lower value: file on market value grounds | ||||||
| Your home is in a high-rate state (TX, NJ, IL, CT) | MODERATE | High rate states have more financial incentive to overassess and more appeal opportunity | Annual appeal culture in TX; routine in NJ and IL; check annually | ||||||
| Overassessment risk is highest in markets that peaked recently and have since corrected, and for homeowners who have never checked their Property Record Card for accuracy. | |||||||||
The 15-Minute Self-Assessment: Three Checks
Check 1: Pull Your Property Record Card (5 minutes)
Go to your county assessor’s website. Search your address. Find the Property Record Card or Assessment Card. Check every line: Living area (square footage): compare to your home’s actual measurements or purchase appraisal. Off by 5%+ on a typical home = potentially hundreds of dollars per year. Bedroom and bathroom count: confirm against your actual home. Improvements recorded: look for pool, garage, finished basement, deck — anything listed that doesn’t exist. Property class: residential vs commercial; single-family vs multi-family. Incorrect class is a significant error. If you find anything wrong: take a screenshot, photograph your home to document the reality, and contact the assessor’s office. This check takes 5 minutes and finds the #1 source of easy wins.
Check 2: Compare Your Assessment to Recent Sales (10 minutes)
Go to your county assessor’s website or Zillow/Redfin and filter for "Sold" listings. Set the filter: your neighborhood or ZIP code; similar square footage; sold in the last 6–12 months. Look at 3–5 sales. Calculate the simple average sale price. Compare to your assessed value. If comparable sales are running 5%+ below your assessed value: you have grounds for a market value appeal. On a $400,000 assessed home: if comps are averaging $370,000 — that’s a $30,000 overassessment. At a 1.5% effective tax rate: $450/year in overpayment. The threshold that’s worth appealing: generally, if the overassessment is more than 5–10% of your assessed value. At 5%: the savings likely justify the time. At 2–3%: borderline; worth a quick informal inquiry at minimum.
Check 3: Compare Your Assessment Ratio to Neighbors’ (5 minutes)
For each of the recent comparable sales you found: look up the selling home’s assessed value at the time of sale (available on the county assessor’s website; search by the comparable property’s address). Calculate: assessed value ÷ sale price = assessment ratio. Do this for 3–5 comparables. Average the ratios. Calculate your own ratio: your assessed value ÷ your estimated market value. If your ratio is 5+ percentage points higher than the average: you have a uniformity argument. Example: Your assessed value: $400,000. Estimated market value (from comps): $380,000. Your ratio: 400/380 = 105.3%. Comparable homes’ average assessment ratio at time of sale: 88%. You are carrying a 17-point higher ratio than comparable neighbors. That is a strong uniformity appeal.
The Market-Specific Overassessment Map: Where to Look First in 2026
Markets With the Highest Overassessment Risk Right Now
The highest overassessment opportunity in 2026 is in markets where prices peaked in 2022–2023 and have since corrected — because assessments trail the market by 1–2 years. Highest risk — appeal now: Tampa, FL: prices down ~10% YOY; 2022–2023 assessments still in effect. DC Metro: prices down 6.1%; DOGE-driven softening not yet in assessments. Austin, TX: some submarkets down 8–12% from peak. Cape Coral / Fort Myers, FL: significant price corrections. Boise, ID: post-correction; assessments may still reflect peak. Moderate risk — check your comps: Phoenix outskirts; parts of Atlanta and Charlotte where corrections occurred in specific submarkets. Lower risk (appeals still possible on other grounds): Columbus, Raleigh, Indianapolis — markets where prices held; appeals more likely on clerical error or condition grounds. Texas statewide: unique protest culture; worth filing every year regardless of market; 75.2% of protesters win some reduction.
What Happens After You Identify an Overassessment
The Decision: Informal Inquiry vs Formal Appeal
If you find a clerical error: call or visit your assessor’s office first. Many clerical errors are corrected without a formal appeal. Takes 10 minutes and a documented error. If you find a market value discrepancy: file a formal appeal (instructions in our Hub guide). Costs $0 to file yourself. Takes 30–90 minutes to prepare if you have your comps ready. Resolves 70–90% of the time at informal hearing. Timeline: From filing to informal hearing: typically 30–90 days. From informal hearing to resolution: same day in most cases. From formal ARB/VAB hearing to decision: same day or within a few weeks. If you win: your assessed value is adjusted. In most states, you receive a corrected tax bill for that year. In some states, you receive a refund for the overassessment. The homestead cap benefit (Texas): a lower base assessment compounds forward. Every year the 10% cap applies to a lower starting number, producing permanent savings that grow over time.
“What I tell every homeowner who has never appealed: "Here is what I want you to do this week. Go to your county assessor’s website. Look up your property. Find the Property Record Card. Check the square footage — is it what your home actually is? Then look at three homes near you that sold in the last year. Find them on Zillow or Redfin under "Sold." What did they sell for per square foot? Multiply that by your square footage. Compare to your assessed value. If your assessed value is more than 5–10% above what that math produces: you are almost certainly overassessed. File an appeal. It costs nothing. It takes 30 minutes. It succeeds 40–60% of the time nationally. 95% of homeowners who should be doing this never do it. The 5% who do save $539 a year on average and their neighbors never find out why their tax bills look different."”
— Ryan Brown, Principal Broker & CEO, Own Luxury Homes®
How do I know if my property tax assessment is too high?
Three checks: (1) Property Record Card accuracy: go to your county assessor’s website, pull your property card, verify every field matches your actual home; errors in square footage, bedrooms, or improvements are grounds for immediate correction. (2) Comparable sales comparison: find 3–5 recent sales (6–12 months) of similar nearby homes; if they averaged 5%+ below your assessed value, you’re likely overassessed. (3) Assessment ratio comparison: calculate your assessed-value-to-market-value ratio; compare to your neighbors’ ratios from recent sales; if yours is significantly higher, file a uniformity appeal. Highest risk markets in 2026: Tampa, DC metro, Austin, Boise — markets where prices corrected but assessments haven’t caught up yet.
Own Luxury Homes® — comparable sales data that reveals overassessment. 12-Point Agent Integrity Audit™. Get a market value analysis to check your assessment ›
"The introduction Own Luxury Homes® makes is to a specialist with documented closing history in your specific market — not the county, not the metro, the submarket you're actually selling or buying in. That's the standard we verify before your name goes anywhere."
— Ryan Brown, Principal Broker & CEO, Own Luxury Homes® (FL License BK3626873)