Air Quality Alert issued June 21 at 4:35PM EDT until June 24 at 2:00AM EDT by NWS

Assessments - Real Property

The State Department of Assessments and Taxation determines the taxable assessment of your real property. It is important that you verify assessment notices received from the SDAT for accuracy. Assessments you do not agree with may be appealed.

St. Mary's County Assessments office can be reached by calling 301-880-2901 or via E-mail: The office is located in the Carter Building, Room 2059. Hours of Operation are 8:00 to 5:00.

Fax Number: 301-475-4856

Mailing address:

State Department of Assessments and Taxation
P.O. Box 1509
Leonardtown, MD 20650-0653

Reassessment Notice Schedule

Reassessment Year Map