Land records · Parcel maps · October 7, 2026
What Is a Property Revaluation? Reassessment Cycles
What is a property revaluation? A periodic reappraisal of all properties in a town or county to current market value. How it affects taxes and appeals.
What is a property revaluation? A property revaluation, also called a reassessment or reappraisal, is a process in which a town, city, or county updates the assessed values of all properties to reflect current market conditions. Instead of valuing each property individually by full appraisal, assessors use mass appraisal methods based on recent sales, property characteristics, and statistical models. Revaluation cycles vary by state, from annual updates to every five or ten years. Revaluations often shift tax burdens between properties, even if total taxes collected stay similar. This page is general land-records background, not legal advice.
Why revaluations happen
Over time, values in different neighborhoods change at different rates. Without revaluation, some owners pay more than their fair share while others pay less. Revaluation resets assessments so each property bears a share of the tax burden that matches its current value.
Revaluation cycles
| Cycle | Typical feature |
|---|---|
| Annual | Values updated every year using sales data |
| Every few years | Common in many states |
| Long cycles | Some places go a decade or more between revaluations |
State law often sets the maximum interval. Some states require physical inspections periodically.
How taxes change
A revaluation does not automatically mean everyone’s taxes rise. If all values go up by the same percentage, the mill rate may be lowered to raise the same budget. Owners whose values rose faster than average tend to see higher taxes; those whose values rose slower may see lower taxes. Some states have truth-in-taxation laws requiring rate rollbacks or public hearings when revaluation increases revenue.
The process
- Data collection: reviewing property records and sometimes inspecting.
- Sales analysis: studying recent sales to build models.
- Valuation: applying models to all properties.
- Notices: owners receive new values. See what is a tax assessment notice.
- Informal reviews and appeals.
- Certification of the new roll.
Appealing a revaluation
Owners who think their new value is too high can request an informal review and then file a formal appeal. Comparable sales, appraisals, and corrections to property records are the strongest evidence. See how to appeal property taxes.
Assessment vs market value
Some states assess at full market value; others use a percentage. Revaluation updates the market value estimate. See assessed value vs market value.
Example
A town revalues after eight years. Total market value rises 40 percent, so the town lowers its mill rate to keep the budget the same. An owner whose home value rose 60 percent sees a tax increase, while a neighbor whose value rose 20 percent sees a decrease.
Checking your property data
Before a revaluation finalizes, review your property record card for errors in square footage, bedroom count, or condition. Correcting data errors is often the quickest way to fix an inaccurate value.
Bottom line
A property revaluation updates all assessed values to current market levels, using mass appraisal. It can shift tax burdens between owners, and rates often adjust. Review your new value and appeal if the evidence supports a lower figure. Find county assessors via the Platbookmapper map.
What is a property revaluation FAQ
What is a property revaluation?
A periodic update of all assessed values to current market value.
Will my taxes go up after a revaluation?
Not necessarily; it depends on how your value changed relative to others and on rates.
How often do revaluations happen?
It varies by state, from annually to every several years.
Can I appeal my new value?
Yes, through informal review and formal appeal.
Do assessors inspect every home?
Not always; they often use sales data and models.