Contact: Collin County Tax Assessor-Collector Office Collin County Administration Building 2300 Bloomdale Road, Suite 2324 McKinney, TX 75070 Phone: 972-547-5020 Email: taxassessor@collincountytx.gov Website: www.collincountytx.gov Hours: 8 a.m. - 5 p.m. Monday - Friday 8 a.m. - 7 p.m. Thursday
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