2021/2022 Non-Residential Sales
Comparable Residential Sales Mapping Tool
Base Period Sales from July 1, 2018–June 30, 2020
In areas with few sales, the Assessor is allowed to use comparable sales going back up to five years.
Apartment Buildings
2021 Apartment Buildings PDF
2021 Apartment Buildings 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.
- 2021 Market Area Viewer
- Countywide Map
- Boulder and Gunbarrel Map
- Longmont and Niwot Map
- Erie, Lafayette, Louisville, and Superior Map
Market Area 101
2021 Market Area 101 PDF
2021 Market Area 101 XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Boulder and Gunbarrel Map
Market Area 102
2021 Market Area 102 PDF
2021 Market Area 102 XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Boulder and Gunbarrel Map
Market Area 103
2021 Market Area 103 PDF
2021 Market Area 103 XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Boulder and Gunbarrel Map
Market Area 104
2021 Market Area 104 PDF
2021 Market Area 104 XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Boulder and Gunbarrel Map
Market Area 105
2021 Market Area 105 PDF
2021 Market Area 105 XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Boulder and Gunbarrel Map
Market Area 106
2021 Market Area 106 PDF
2021 Market Area 106 XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Boulder and Gunbarrel Map
Market Area 107
2021 Market Area 107 PDF
2021 Market Area 107 XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Boulder and Gunbarrel Map
Market Area 201
2021 Market Area 201 PDF
2021 Market Area 201 XLSX
2021 2021 Mountain Residential Time Trends – Market Areas: 201, 202, PDF
2021 2021 Mountain Residential Time Trends – Market Areas: 201, 202, XLSX
Countywide Map
Market Area 202
2021 Market Area 202 PDF
2021 Market Area 202 XLSX
2021 2021 Mountain Residential Time Trends – Market Areas: 201, 202, PDF
2021 2021 Mountain Residential Time Trends – Market Areas: 201, 202, XLSX
Countywide Map
Market Area 301
2021 Market Area 301 PDF
2021 Market Area 301 XLSX
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, PDF
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, XLSX
Countywide Map
Market Area 302
2021 Market Area 302 PDF
2021 Market Area 302 XLSX
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, PDF
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, XLSX
Countywide Map
Market Area 303
2021 Market Area 303 PDF
2021 Market Area 303 XLSX
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, PDF
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, XLSX
Countywide Map
Market Area 304
2021 Market Area 304 PDF
2021 Market Area 304 XLSX
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, PDF
2021 2021 Unincorporated Plains Residential Time Trends – Market Areas: 301, 302, 303, 304, XLSX
Countywide Map
Market Area 401
2021 Market Area 401 PDF
2021 Market Area 401 XLSX
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, PDF
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, XLSX
Boulder and Gunbarrel Map
Market Area 402
2021 Market Area 402 PDF
2021 Market Area 402 XLSX
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, PDF
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, XLSX
Erie, Lafayette, Louisville, and Superior Map
Market Area 403
2021 Market Area 403 PDF
2021 Market Area 403 XLSX
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, PDF
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, XLSX
Erie, Lafayette, Louisville, and Superior Map
Market Area 404
2021 Market Area 404 PDF
2021 Market Area 404 XLSX
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, PDF
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, XLSX
Erie, Lafayette, Louisville, and Superior Map
Market Area 405
2021 Market Area 405 PDF
2021 Market Area 405 XLSX
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, PDF
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, XLSX
Erie, Lafayette, Louisville, and Superior Map
Market Area 501
2021 Market Area 501 PDF
2021 Market Area 501 XLSX
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, PDF
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, XLSX
Longmont and Niwot Map
Market Area 502
2021 Market Area 502 PDF
2021 Market Area 502 XLSX
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, PDF
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, XLSX
Longmont and Niwot Map
Market Area 503
2021 Market Area 503 PDF
2021 Market Area 503 XLSX
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, PDF
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, XLSX
Longmont and Niwot Map
Market Area 505
2021 Market Area 505 PDF
2021 Market Area 505 XLSX
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, PDF
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, XLSX
Longmont and Niwot Map
Market Area 507
2021 Market Area 507 PDF
2021 Market Area 507 XLSX
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, PDF
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, XLSX
Longmont and Niwot Map
Townhomes
Market Area 108 – Boulder, East of Broadway and All Other Townhomes
2021 Market Area 108 – Boulder, East of Broadway and All Other Townhomes PDF
2021 Market Area 108 – Boulder, East of Broadway and All Other Townhomes XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Market Area 109 – Boulder, West of Broadway and Downtown Townhomes
2021 Market Area 109 – Boulder, West of Broadway and Downtown Townhomes PDF
2021 Market Area 109 – Boulder, West of Broadway and Downtown Townhomes XLSX
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, PDF
2021 2021 Boulder Residential Time Trends – Market Areas: 101, 102, 103, 104, 105, 106, 107, 108, 109, XLSX
Market Area 407 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Townhomes
2021 Market Area 407 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Townhomes PDF
2021 Market Area 407 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Townhomes XLSX
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, PDF
2021 2021 Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Residential Time Trends – Market Areas: 401, 402, 403, 404, 405, 407, 501, XLSX
Market Area 506 – Longmont Townhomes
2021 Market Area 506 – Longmont Townhomes PDF
2021 Market Area 506 – Longmont Townhomes XLSX
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, PDF
2021 2021 Longmont Residential Time Trends – Market Areas: 502, 503, 504, 505, 506, 507, XLSX
Condominiums
Market Area 630 – Boulder Condos
2021 Market Area 630 – Boulder Condos PDF
2021 Market Area 630 – Boulder Condos XLSX
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, PDF
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, XLSX
Market Area 632 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Condos
2021 Market Area 632 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Condos PDF
2021 Market Area 632 – Erie, Gunbarrel, Lafayette, Louisville, Niwot, and Superior Condos XLSX
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, PDF
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, XLSX
Market Area 633 – Longmont Condos
2021 Market Area 633 – Longmont Condos PDF
2021 Market Area 633 – Longmont Condos XLSX
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, PDF
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, XLSX
Market Area 634 – Mountain Condos
2021 Market Area 634 – Mountain Condos PDF
2021 Market Area 634 – Mountain Condos XLSX
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, PDF
2021 2021 Condominium Residential Time Trends – Market Areas: 630, 632, 633, 634, XLSX
Manufactured Housing
Manufactured homes are also referred to as Mobile Homes.
2021 Manufactured Housing PDF
2021 Manufactured Housing XLSX
