County Assessor

County Assessor Jake Zimmerman

The Saint Louis County Assessor's Office classifies and assesses all real and personal property within St. Louis County. The Office is comprised of:

  • Title Recording
  • Appraisals
  • Assessments
  • Personal Property
  • Real Property


The Assessor is required by Missouri law to establish the fair market value of all parcels of real property in St. Louis County as of January 1 of each odd-numbered year.

The Board of Equalization is responsible for assessment appeals. You can find information about filing an appeal or about your hearing at:

or by calling the Board of Equalization at 314 615-1795.

We are committed to treating every property owner fairly, and to providing clear, accurate and timely information.

Jake Zimmerman
County Assessor

Office Information - Assessor

Address: St. Louis County Assessor Saint Louis County Assessor
41 South Central Avenue
Clayton, MO 63105-1799

(The Assessor's Office is located on the second and third floors of the Lawrence K. Roos County Government Building.)
Phone Numbers: Personal Property
(314) 615-1500

Real Estate
(314) 615-2555

All Other Inquiries
(314) 615-5500

Email: Contact Us
Office Hours: 8:00 a.m. - 5:00 p.m.