Texas Tax Protest Lowering Your Residential and. Tax Information For New Homeowners Republic Title. All jurisdictions in Collin County may be accessed at the Collin Central Appraisal. The Collin Appraisal District appraises property located in Collin County The City of Plano as one of the local taxing units sets the City tax rate. Experience We have been completing appraisals in Frisco and Collin county.