County Assessor Home Page

County Assessor

County Assessor Jake Zimmerman

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 Assessor is required by Missouri State Statute 137.1 15 to establish the fair market value of all approx. 389,000 parcels of real property in St. Louis County as of January 1 of each odd-numbered year (like 2019). The assessed value is applied to the tax rates established by the taxing districts to determine the amount of tax levied against a property.

All residential property owners will receive a Change of Assessment Notice in the mail even if their value has not changed. Residential property owners should expect to receive the Change of Assessment Notice beginning mid-May.

Commercial property owners should expect to receive a Change of Assessment Notice by mid-June.

All property owners can now view their 2019 preliminary values online: or by contacting the Assessor’s Office Monday – Friday between 8:30 am and 4:30 pm:
Residential property owners call:      314 615-4981
Commercial property owners call:     314 615-4984

Owners of residential properties can request an informal conference to discuss the value of their primary residence only, by calling 314 615-4595 beginning May 15th. Appointments are limited so owners are encouraged to call early. Owner/occupants are encouraged to take advantage of this option so they can meet one-on-one with an appraiser and likely have their issues resolved without the need for a formal appeal.

Detailed information on how to appeal property value during both informal conferences and formal appeal to the Board of Equalization is in the “Property Value Appeals” brochure online:

The staff of the Assessor’s Office is committed to treating every property owner fairly, and to providing clear, accurate and timely information.

Jake Zimmerman

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.