Union County property tax

Look up any Union County address to see the county's record of the home and recent sales nearby.

116,027 parcels · Union County ArcGIS (parcels with last three sales; assessed values) · updated Oct 27, 2026

Revaluation schedule

Last revaluation	2025
Next revaluation	2029
Values you'd appeal now are as of	Jan 1, 2025

In a revaluation year you can appeal your new value after the notice arrives. In other years, the county carries the last revaluation's value forward and changes it only for specific reasons (for example a clerical error, an appraisal error, or a physical change to the property).

How to appeal in Union County

Check the record — and ask the assessor to fix factual errors.
Informal review with the Union County Tax Administration, usually within 30 days of your notice.
Formal appeal to the Union County Board of Equalization and Review, by the deadline on your notice.
NC Property Tax Commission within 30 days of the board's decision.

Phone 704-283-3746. County tax website.

The full step-by-step guide (written for Mecklenburg; the state process is the same everywhere, but deadlines and contacts differ by county).

Union County sales at a glance

Since Jan 1, 2023, the county's records show 22,662 sales with a price. 19,704 (87%) carry no disqualification code; the rest were flagged by the county as not arm's-length.

Code	County's reason	Sales
ADDITION PARCELS INC/SALE	Multi-parcel sale	1,499
NOT OPEN MARKET	Not an open-market sale	758
FAMILY TRANSACTION	Related parties	180
AFFILIATED COMPANIES	Affiliated companies	171
STAMPS LESS THAN $6.00	Nominal excise stamps	123
OTHER REASON	Other reason	73
LENDOR,GOVERNMENT,UTILITY	Lender, government or utility	64
NOT A WARRANTY DEED	Not a warranty deed	28

Source: Union County ArcGIS (parcels with last three sales; assessed values), as of Oct 27, 2026.

Get told when Union County's new values come out

One email when values are released, and one when our DIY appeal tools open.