Were you displaced due to recent flooding in St. Louis County?

County Assessor

County Assessor, Jake Zimmerman, photo.

The Saint Louis County Assessor's Office discovers, identifies, classifies and assesses all real and personal property within Saint Louis County. Functionally, the Office is comprised of:

  • Abstract (Title Recording)
  • Appraisal Support
  • Assessment Systems
  • Personal Property
  • Real Property

The County Assessor is required by Missouri State Statute 137.115 to establish the fair market value of all real property as of January 1 of every odd year (like 2011 and 2013). The assessed value is applied to the tax rates established by the taxing districts to determine the amount of tax levied against a property.

The reassessment process involves establishing the value of about 389,000 parcels of real property, providing owners the opportunity to appeal, then finalizing, certifying and communicating the values to the individual taxing districts.

Throughout the process, the staff of the Assessor’s Office makes every effort to treat our customers fairly and to provide information in a clear and accessible manner.

Jake Zimmerman

Business/Manufacturing Declarations
Address: 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:   Monday - Friday
8:00 am to 5:00 pm