Commissioners: “We will continue to value, respect, and support all individuals as we serve the people of Boulder County.” Read full message.

Immigrant Resources, including a Know Your Rights Booklet, available on the Immigration Resources webpage.

2023 Adjustments

2023/2024 Time Trend Adjustments

2023/2024 Comparable Sales

Using Time Trending for Property Valuation

Time Trends July 1, 2017 through June 30, 2022

Residential

Market Area Factor Tables
2023 Apartment Time Trends
Market Areas: 640, 641, 642, 643, 644, 645		 PDF XLSX
2023 Condominium Residential Time Trends
Market Areas: 630, 632, 633, 634		 PDF XLSX
2023 Boulder Residential Time Trends
Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109		 PDF XLSX
2023 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends
Market Areas: 401, 402, 403, 404, 405, 407, 501		 PDF XLSX
2023 Longmont Residential Time Trends
Market Areas: 502, 503, 504, 505, 506, 507		 PDF XLSX
2023 Mountain Residential Time Trends
Market Areas: 201, 202		 PDF XLSX
2023 Unincorporated Plains Residential Time Trends
Market Areas: 301, 302, 303, 304		 PDF XLSX

Vacant Land

Location Factor Tables
2023 Boulder Time Trends PDF XLSX
2023 Erie Time Trends PDF XLSX
2023 Lafayette Time Trends PDF XLSX
2023 Longmont Time Trends PDF XLSX
2023 Louisville Time Trends PDF XLSX
2023 Lyons Time Trends PDF XLSX
2023 Mountain towns (Nederland, Ward, Jamestown) Time Trends PDF XLSX
2023 Superior Time Trends PDF XLSX
2023 Unincorporated Time Trends PDF XLSX
2023 Commercial (outside Boulder) Time Trends PDF XLSX
2023 Commercial in Boulder Time Trends PDF XLSX

Commercial

Property Use Factor Tables
2023 Industrial Time Trends PDF XLSX
2023 Lodging Time Trends PDF XLSX
2023 Office/Medical Time Trends PDF XLSX
2023 Retail Time Trends PDF XLSX

Commercial Condos

Property Use Factor Tables
2023 Industrial Time Trends PDF XLSX
2023 Office/Medical/Retail/Restaurant Time Trends PDF XLSX