Sullivan County, TennesseeProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Payment deadline
- 2026 Sullivan County taxes become due and payable October 5, 2026 (the first Monday in October) and are payable through February 28, 2027; unpaid taxes become delinquent March 1, 2027.
- Assessment appeal
- The Sullivan County Board of Equalization meets beginning June 1, 2026 for approximately two weeks. Appeal to the State Board by August 1, 2026 or within 45 days after the county-board notice, whichever is later; official guidance: https://comptroller.tn.gov/boards/state-board-of-equalization/value-appeals.html
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
Tennessee has no general homeowner homestead exemption. For tax year 2026, first-time Greenbelt applications are due March 15, 2026; State Board of Equalization property-tax exemption applications are generally due May 20, 2026; and state Tax Relief/Tax Freeze applications are filed with the county Trustee. Official program information: https://comptroller.tn.gov/office-functions/pa/property-taxes/property-tax-programs/tax-relief.html.
Senior relief
The Sullivan County Trustee administers Tennessee Property Tax Relief for qualifying elderly, disabled, disabled-veteran, and surviving-spouse homeowners. The official 2026 Comptroller participating-jurisdiction list does not list Sullivan County as a countywide local-option Property Tax Freeze county; confirm current eligibility with the Trustee.
Valuation limits
No general Tennessee individual assessed-value cap was verified. Sullivan County's official Assessor page says the next countywide reappraisal is scheduled for 2027; Tennessee certified-tax-rate/revenue-neutral rules, Greenbelt, and any qualifying senior relief are separate protections.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →