Agricultural Valuation
Ranch land in King County can be taxed on productivity, not market value
Ranch and farm land in King County can be taxed on what it produces, not what it would sell for. This can mean a much lower tax bill.
Texas lets farm and ranch land be valued on its productivity instead of its market value. In King County, where most land is used for cattle ranching, this can cut your property tax bill significantly.
To qualify, the land must have been used for agriculture for at least five of the past seven years. You apply with the King County Appraisal District — not the tax office. You use state forms to apply. The appraisal district sets local standards for how much ranching activity counts.
Be careful if you ever stop using the land for agriculture. You will owe rollback taxes going back three years, plus interest. The Texas Comptroller's ag-timber page explains the full process and has the application forms.
Source to confirm: Texas Comptroller — Agricultural and Timber Use Special Appraisal