Janesville Tax Assessor Offices


Janesville tax assessor office in Janesville, Wisconsin maintains the assessment of real properties in its area of jurisdiction. The components of a tax assessment include the physical description and inventory of the subject area. It also includes the value estimate of each parcel of land in an up-to-date manner. The office of the tax assessor in Janesville conducts an annual analysis of the properties in order to determine changes in certain assessments if there are any.

Janesville Tax Assessor Overview

It is the duty and responsibility of the Janesville tax assessor office to provide transparent information to the public regarding tax processes and appraisals. The directory portal provides updated information of the local tax assessor and tax office for the reference of Janesville taxpayers:


Janesville Tax Assessor: Rock County Real Property Lister

Tax Assessor Office Address: Rock County Courthouse, 51 South Main St., Janesville, WI 53545

Phone: (608)757-5650

Fax: (608)757-5563

Website: http://199.233.45.158/realproperty

Zip Code: 608

Office Hours: Central

Why keep in touch with your local WI tax office?

Knowing the current value of your property is essential for your tax payment obligations. Tax assessment helps determine how much you need to pay for your property taxes. It is also important in case you put your property up for sale. For more details, call or visit your Janesville tax assessor office today.