If you have questions about property valuation and property tax, visit boco.org/2023Valuation.

2023 Time Trend 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, & 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

Contact Us

Assessor
Phone: 303-441-3530
Fax: 303-441-4996

Email

Mailing Address
PO Box 471
Boulder, CO 80306-0471

*New as of Jan 4, 2021*
Monday thru Thursday
Hours: 7:30 am–5 pm
CLOSED Friday

Locations

Assessor Boulder & Longmont Drop Boxes

Boulder
1325 Pearl Street, 2nd floor
Boulder, CO 80302
Monday thru Thursday
Hours: 7:30 am–5 pm
Map & Directions

Longmont
515 Coffman Street, Suite 114
Monday ONLY
Hours: 7:30 am–5 pm
Map & Directions

Lafayette
1376 Miners Drive, Unit 105
Tuesday ONLY
Hours: 7:30 am–5 pm
Map & Directions