Boulder County Colorado Property Search
To search Boulder County property records, use the tool below by owner name, parcel number, or street address. Boulder County sits along Colorado’s Front Range and is home to the University of Colorado Boulder and a strong tech economy — which helps push home values among the highest in the state (well over $700,000 in the city of Boulder and above $800,000 in Louisville). The county has about 112,198 residential and 4,099 commercial properties and an effective 2025 property tax rate of roughly 0.56%. Records are kept by the Boulder County Assessor at the courthouse on Pearl Street.
Property Search
Partial info works — a last name or street name is enough.
Note: Results come from Colorado’s public GIS database and may not reflect the most recent changes. For verified records, contact the county assessor directly.
How Property Is Assessed in Boulder County
The Boulder County Assessor values residential, commercial, and agricultural property, with a full reappraisal in odd-numbered years. Values are based on the property’s condition as of January 1, estimated as if it had sold on June 30 of the prior even year — so a 2026 value reflects what the home would have sold for on June 30, 2024. For a full breakdown, see our Colorado property tax overview.
One recent change worth knowing: starting with tax year 2025 (payable in 2026), Colorado applies two residential assessment rates — one for school districts and a slightly lower one for other local districts (fire, city, county, and special districts). This affects how your final bill is calculated.
Each of the county’s 100,000-plus parcels has a unique parcel number, which is the fastest and most accurate way to pull up ownership, land size, building details, and tax records.
Assessor’s Office — Contact & Key Dates
Boulder, CO 80302
Boulder, CO 80306
August 15 — Assessor mails determinations.
September 15 — Deadline to appeal to the County Board of Equalization.
4 Ways to Find a Property Record
Full or partial name — shows all parcels registered under one owner.
Unique Property ID on your tax statement or deed. Fastest and most accurate method.
Enter the address to pull current owner, parcel data, and assessed value.
Filter to Boulder, Longmont, or Lafayette to browse an area.
Property Tax by City
| City / Town | Population | Total parcels | Median home value | Median residential tax |
|---|---|---|---|---|
| Boulder | 106,803 | 30,941 | ~$713,900 | ~$6,800 |
| Longmont | 97,833 | 37,492 | ~$580,000 | ~$5,900 |
| Louisville | 21,171 | 7,450 | ~$815,000 | ~$9,100 |
| Superior | 13,099 | 5,120 | ~$780,000 | ~$8,400 |
| Erie (Boulder portion) | 12,791 | 5,320 | ~$690,000 | ~$8,600 |
| Lafayette | 30,377 | 11,205 | ~$645,000 | ~$7,600 |
Mill levies vary by city and special district; check the Treasurer for a specific property’s rate. These figures are estimates for research.
Exemptions & Tax Relief
Homeowners 65 or older who have owned and lived in their home for 10 consecutive years can have 50% of the first $200,000 of value exempted. Apply with the Assessor. Full eligibility: Colorado homestead exemption for seniors.
Veterans with a 100% permanent service-connected disability get the same 50% exemption on the first $200,000, regardless of age. Surviving spouses may qualify. Details: disabled veteran exemption Colorado.
Boulder County is known for its large open-space and farmland programs. Land in qualifying agricultural use is valued on production rather than market value, which can significantly lower the assessment. Ask the Assessor how your land is classified.