Property Appraisal
The Property Appraisal Division appraises the value of all property in the county for tax purposes. Taxable property is divided into two classes:

Real Property (Residential, Farm & Commercial)
  • All buildings
  • Improvements to the land
  • Land
  • Structures

Personal Property
  • Equipment
  • Fixtures
  • Furniture
  • Other items that are movable in nature, which are used by a business
  • Machinery

Learn more about the Appraisal Process

Office Assistance
An important duty of the Property Assessor's office is providing public information to assist taxpayers with questions regarding property ownership, assessment, and recent property sales.

The Assessor's office handles thousands of requests annually, by phone, mail, or in person, from current or prospective property owners, as well as from the real estate, legal, and banking communities.

The Office Assistance Division is responsible for assisting the general public in obtaining such information.

Data Management
The Data Management Division is responsible for maintaining all of Williamson County's property assessment / tax records on the State Comptroller's mainframe.

Reappraisal of property for tax purposes is required on a periodic basis to maintain appraisals at market value and to ensure equity of appraisals throughout the jurisdiction.

Williamson County is on a five-year cycle that consists of four years of comprehensive on-site review of every parcel of property in the county, followed by revaluation of all property in the fifth year.

The Verification Division qualifies and disqualifies all farm, commercial and residential sales. Only qualified sales are used for the five year reappraisal program.

Cadastral Mapping
For the Assessor, maps are a means to inventory all real property within the jurisdiction. The Assessor is required to maintain an up-to-date set of maps that display all of the parcels in the county, detailing their locations and physical characteristics.

The Cadastral Mapping Division maintains current digital maps of official property lines, public right-of-ways, county annexations and other features, and maintains databases of transfers of properties and alteration of property lines.

In Williamson County, this is accomplished through the use of a CAD-based GIS (Geographic Information System). Master digital maps are updated to reflect new subdivisions, surveys, property splits and the combining of parcels as they occur, and then paper maps are printed and placed in cabinets for reference and public viewing.

Greenbelt Program
The term “Greenbelt” refers to Tennessee’s Agricultural, Forest, and Open Space Land Act of 1976, (commonly referred to as the “Greenbelt Law” or “Greenbelt Program”). This law provides for the assessment of agriculture, forest, and open space lands for tax purposes based on present use value rather than current market value for similar properties.

The present use value is determined by the Comptroller’s Division of Property Assessments using a statutory formula that blends farm income and market data.
The Greenbelt Program was designed to:
  • Encourage continued production of valuable food and fiber:
  • Prevent loss of family farms due to higher taxes based on speculation rather than use values;
  • Provide relief from urban sprawl and provide green spaces for enjoyment of people who would not normally have access to such areas.