Property taxes are one of the largest recurring costs of homeownership, and most owners pay without ever questioning the number. But assessors work from mass-appraisal models that regularly misvalue individual properties — and the appeal process exists precisely for this reason. Across the country, homeowners who appeal their assessments win reductions in 30–60% of formal cases. The process takes a few hours and the savings can last for years.
What changed in 2026
- Home values plateaued or declined in many markets after the 2021–2023 appreciation surge, but reassessments often lag by 1–2 years. This means assessed values in many jurisdictions now exceed current market values — a ripe environment for appeals.
- Online appeal portals became standard in most major counties. You can submit evidence, schedule hearings, and track case status without visiting a government office.
- Exemption awareness campaigns expanded. Many states pushed outreach on unclaimed homestead and senior exemptions after studies showed billions in unclaimed savings annually.
- Remote work continued affecting urban/suburban valuations — some urban condo markets saw genuine declines while suburban single-family homes held value; check your local data.
Step 1: Check for factual errors
Your assessment card (available at the county assessor's website) lists the property characteristics used to calculate your value. Review:
| What to check |
Where to find it |
Common errors |
| Square footage |
Assessment card |
Finished vs unfinished basement; garage inclusion |
| Bedroom / bathroom count |
Assessment card |
Unrecorded additions, demo'd rooms |
| Lot size |
Property records |
Survey vs approximation errors |
| Property classification |
Assessment card |
Residential vs commercial misclassification |
| Exemptions applied |
Assessment notice |
Missing homestead, senior, veteran exemption |
A simple factual correction — wrong square footage, for example — is the easiest win and doesn't require a formal appeal in most jurisdictions.
Step 2: Claim all exemptions
Exemptions reduce the assessed value before the tax rate is applied. Check eligibility for:
| Exemption |
Who qualifies |
Typical savings |
| Homestead exemption |
Primary residence owners |
$25,000–$100,000 off assessed value |
| Senior exemption |
Usually 65+, income-limited |
Varies by county; often significant |
| Veteran / disabled veteran |
Military service, varies by state |
Partial to full exemption in some states |
| Disability exemption |
Qualifying disability |
Varies; often stackable with other exemptions |
| Agricultural / greenbelt |
Qualifying land use |
Can be very large for eligible rural land |
Apply through your county assessor's office — most exemptions require an initial application but renew automatically. Deadlines vary but are often January–April.
Step 3: Gather comparable sales
If your assessed value exceeds current market value, comps are your argument:
- Find 3–5 homes similar to yours (size, age, condition, location) that sold in the past 6–12 months
- Sources: county recorder's website, Zillow, Redfin, Realtor.com — look for actual sale prices, not asking prices
- Calculate the price-per-square-foot of each comp and compare to your implied assessment value
- If comps average $180/sqft and your assessment implies $220/sqft, you have a documented discrepancy
Step 4: File the appeal
| Stage |
What happens |
Success rate |
| Informal review |
Call or meet with assessor; present errors/comps |
Often resolves quickly if case is clear |
| Formal appeal board |
Written appeal + hearing with assessment board |
~30–60% result in reduction |
| State board / tax court |
Further appeal if board denies; usually attorney-assisted |
Reserved for large properties |
Filing deadlines are strict — most counties have 30–90 days from the assessment notice date. Missing the deadline means waiting another year.
How to build your appeal packet
- Copy of your current assessment notice
- Assessment card (showing property characteristics)
- Photos of any condition issues (deferred maintenance, damage) affecting value
- 3–5 comparable sales with address, sale date, sale price, and square footage
- A one-page summary stating: "My assessed value of $X exceeds market value based on comps averaging $Y"
Common mistakes
Missing the deadline. Mark your calendar the day you receive the assessment notice. Deadlines are firm.
Comparing asking prices. Only closed sale prices count as evidence. Listing prices are not comps.
Appealing in a rising market without evidence. If market prices genuinely exceed your assessed value, an appeal could backfire — your assessor could increase the value. Know the current market first.
Ignoring condition. If your home needs a new roof, has foundation issues, or has other problems not reflected in the assessment, document them with photos and repair estimates.
What to skip
- Hiring a contingency-fee consultant for modest savings — they charge 25–50% of tax savings for years. On a small reduction, you may net less than doing it yourself.
- Appealing without evidence — emotion doesn't win appeals; market data does.
- Skipping the informal review — many assessors will reduce values without a formal hearing if the discrepancy is clear.
FAQ
How often can I appeal?
In most jurisdictions, every year during the appeal window — though reassessments may only happen every 1–4 years.
Will my neighbors' appeals affect my assessment?
Generally no — each property is assessed independently.
Does winning an appeal affect my home's sale price or Zillow estimate?
Your tax assessment is separate from market value. A successful appeal doesn't directly affect what buyers will pay.
Do I need a lawyer to appeal?
For most residential appeals, no. Small claims-style appeal boards are designed for homeowners to represent themselves. Attorneys become worthwhile for large commercial or complex cases.
Where to go next