In order to buy a property offered for sale you must have a Written Statement declaring you owe no tax in Collin County. Tax Code Section 23.01 requires appraisal districts to appraise taxable property at market value as of Jan. 1.• Land Access: Escalating land values and competition for land from developers and non-farming investors puts land ownership out of reach for many producers. The mission of the Collin Central Appraisal District is to appraise all property in the Collin County Appraisal District at market value equally and uniformly. Send a For Sale By Owner prospecting letter to neighbors in 3 simple steps. Learn how to generate leads for your FSBO campaign. In Texas, everybody has the right to protest their property tax appraisal. The mission of the Collin Central Appraisal District is to appraise all property in the Collin County Appraisal District at market value equally and uniformly. The only public college in the county, Collin College offers more than 100 degrees and certificates in a wide range of disciplines. Heather Cox Richardson.