To file an appeal by mail, send your written documentation that includes the property schedule number, property owner’s name and phone number, property owner’s estimate of value, an explanation of why the Assessor’s value is being appealed and any documentation supporting the appeal to the email through USPS to Summit County Assessor, PO Box 276, Breckenridge, CO 80424. Please note that mailed protests must be postmarked on or before June 8.