The assessor values your home from a record of its features. If the record is wrong, the value is wrong, and a factual error is the easiest appeal to win. Many assessors fix clear errors without a hearing.
Where to find your record
Search your county or town assessor's website by address or parcel number. The record may be called a property record card, property card, parcel details or appraisal card. If it isn't online, ask the assessor's office for a copy; it is a public record.
Example record (made-up data): spot the errors
Living area on record
2,400 sq ft
Living area measured
2,050 sq ft
Basement on record
Finished, 900 sq ft
Actual basement
Unfinished
Bathrooms
2.5
Year built
1978
Condition on record
Good
Actual condition
Roof and foundation need repair
In this example, three errors overstate the home's size, finish and condition. Each one is a reason to lower the value.
The 10-point checklist
Tick each line as you check it. Your ticks stay in this browser only.
What to do when you find an error
Document it
Take photos, measure, and gather papers: a floor plan, an old appraisal, building permits, a closing statement or repair estimates.
Ask the assessor to correct it
Call or email the assessor's office with your evidence. Clear factual errors are often fixed informally. Get any correction in writing.
File a formal appeal before the deadline anyway
If the correction isn't confirmed in writing before your deadline, file the appeal to protect your rights. Our state guides list the deadline and form, and include a free appeal letter.