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To report a Public Health order violation, complete this form. Questions about COVID & your business? Email covidbiz@bouldercounty.org.

2019/2020 Residential Sales

Current 2019/2020 Tax Years: Residential Sales

2019/2020 Comparable Sales

2019/2020 Non-Residential Sales

Comparable Residential Sales Mapping Tool

Base Period Sales from July 1, 2016–June 30, 2018

In areas with few sales, the Assessor is allowed to use comparable sales going back up to five years.

Apartment Buildings

Apartment Buildings PDF XLSX

Single Family Residential Properties

Sales of single family homes, duplexes, and triplexes.

Market Area Maps for Single Family Properties

Comparable properties are often found in the same Market Area, which are groups of neighborhoods that have similar trends in the market. Boulder County uses these areas to establish market value for mass appraisal purposes.

Single Family Residences
Market Area 101 PDF XLSX Boulder Area Map
Market Area 102 PDF XLSX Boulder Area Map
Market Area 103 PDF XLSX Boulder Area Map
Market Area 104 PDF XLSX Boulder Area Map
Market Area 105 PDF XLSX Boulder Area Map
Market Area 106 PDF XLSX Boulder Area Map
Market Area 107 PDF XLSX Boulder Area Map
Market Area 201 PDF XLSX County Overview Map
Market Area 202 PDF XLSX County Overview Map
Market Area 301 PDF XLSX County Overview Map
Market Area 302 PDF XLSX County Overview Map
Market Area 303 PDF XLSX County Overview Map
Market Area 304 PDF XLSX County Overview Map
Market Area 401 PDF XLSX Boulder Area Map
Market Area 402 PDF XLSX Southeast County Map
Market Area 403 PDF XLSX Southeast County Map
Market Area 404 PDF XLSX Southeast County Map
Market Area 405 PDF XLSX Southeast County Map
Market Area 501 PDF XLSX Longmont Area Map
Market Area 502 PDF XLSX Longmont Area Map
Market Area 503 PDF XLSX Longmont Area Map
Market Area 505 PDF XLSX Longmont Area Map
Market Area 507 PDF XLSX Longmont Area Map

Townhomes

Residential Townhomes
Market Area 108 – Boulder, East of Broadway and All Other Townhomes PDF XLSX
Market Area 109 – Boulder, West of Broadway and Downtown Townhomes PDF XLSX
Market Area 407 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, & Superior Townhomes PDF XLSX
Market Area 506 – Longmont Townhomes PDF XLSX

Condominiums

Residential Condominiums
Market Area 630 – Boulder Condos PDF XLSX
Market Area 632 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, & Superior Condos PDF XLSX
Market Area 633 – Longmont Condos PDF XLSX
Market Area 634 – Mountain Condos PDF XLSX

Manufactured Housing

Manufactured homes are also referred to as Mobile Homes. See a more detailed definition.

Manufactured Housing PDF XLSX

Contact Us

Due to COVID-19, all Assessors Office sites are closed for business until further notice. Please call or email us with your questions during our normal business hours.

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

Business Personal Property
Phone: 303-441-3316
Fax: 303-441-1783

Email

Schedule a meeting

Mailing Address
Main: PO Box 471
Boulder, CO 80306-0471

Locations
Boulder
1325 Pearl St., 2nd floor
Boulder, CO 80302
Map & Directions
Hours: 8 a.m.-4:30 p.m. M-F

Longmont
515 Coffman Street, Suite 114
Map & Directions

Lafayette
1376 Miners Dr., Unit 105
Map & Directions