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. Pay property taxes on time.Property Tax Statements are mailed out in October, and are due upon receipt. Estimate net proceeds on the sale of your home with Zillow's simple home sale calculator. The Collin Central Appraisal District does not levy taxes, set tax rates or collect taxes. Use our home sale calculator to estimate the cost of selling and the net proceeds you could earn from the sale. Estimate your net proceeds with Orchard's free home sale calculator. This is how much you'll make from selling your house, minus fees and related-costs. Fill out the form and we will get back to you within 24 hours. Get a fair offer if you want to sell your house as-is in Colin County and surrounding areas.