Most Residential and Commercial Annual Notices of Assessment for 2024 will be mailed in April. An Annual Notice of Assessment is not a tax bill. The notice informs you of the value assessed on your residential or commercial real estate as of January 1, 2024. Property owners may appeal the assessed value within 45 days of the date of the notice by submitting a completed PT-311A state appeal form to the Tax Assessors’ Office or by visiting Gwinnett-Assessor.com.