Heads up, Gwinnett: Your annual property assessments are in the mail.

County officials mailed approximately 283,000 assessments to local home and business owners on Friday. The notices include the estimated value of taxable property and provide an explanation of any change in value from the previous year.

About 57 percent of all properties in Gwinnett will see a change in their value, the county said.

“Overall, property sales reflect a real estate market that remains positive with high demand,” officials said in a news release.

The assessments are not property tax bills — but do include an initial estimate of 2019 property taxes using this year's assessed value and last year's millage rates. The current year's millage rates will not be set until later in the year, and tax bills will not be sent until after that.

Assessments can, however, be appealed.

Appeals must be filed within 45 days of the date on the notice of assessment and can be completed online at gwinnett-assessor.com. Property owners can also contact the tax assessor's office by calling 770-822-7200 or sending an email to taxpayer.services@gwinnettcounty.com.

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Channel 2's Matt Johnson reports.