Boulder County, CO

Boulder County, CO assessor property search and records

Use this county guide to find official assessor property search resources, recorder and deed links, tax records, GIS parcel maps, permits, and property data insights for Boulder County, Colorado. Search an address or APN, then jump to official county sources or property tax and value data.

Official sources

Boulder County assessor, recorder, tax, and parcel map sources

Use this table to find the official county source for assessor property search, recorded documents, property tax, GIS parcel maps, permits, and zoning records.

Boulder County official assessor, tax, deed, GIS, permit, and land-use sources
Record typeOfficial sourceNotes
Assessed valuesBoulder County Property Searchmaps.bouldercounty.org/boco/PropertySearch
  • Provides assessor data, property values, and tax estimates.
  • Includes links to GIS mapping and deed reports.
Property searchBoulder County Property Searchmaps.bouldercounty.org/boco/PropertySearch
  • Centralized portal for property information.
Deeds and recorded documentsBoulder County Clerk and Recorder Public Searchboulder.co.publicsearch.us
  • Official vendor portal for searching recorded real estate documents and deeds.
Property taxesBoulder County Treasurer Property Taxesbouldercounty.gov/property-and-land/treasurer/taxes/
  • Official site for tax payments and treasurer information.
  • Property tax estimates are available via the Assessor's property search tool.
GIS and parcel mapsBoulder County Property Search (GIS)maps.bouldercounty.org/boco/PropertySearch
  • Integrated GIS mapping within the property search portal.
Permits and building recordsBoulder County Services Portal (Accela)aca-prod.accela.com/BOCO/Default.aspx
  • Official portal for building permits and land use applications.
Zoning and land useBoulder County Zoning Informationbouldercounty.gov/property-and-land/land-use/zoning/land-use-code/county-zoning/
  • Covers unincorporated Boulder County. Properties within municipalities require contacting the specific city planning department.
County data

Boulder County tax rates and property values

County and city-level rollups from AssessorSearch indexed property data. Use these values as directional context, then verify parcel-specific details with the official county sources above.

Median estimated value$747,568

Median estimated market value for properties in this county.

AssessorSearch county data
Median assessed value$50,783

Median assessed value from county assessment records when available.

AssessorSearch county data
Median annual property tax$4,726

Median annual property tax amount from indexed tax records when available.

AssessorSearch county data
Median effective property tax rate0.62%

Median effective property tax rate calculated from annual tax and value fields.

AssessorSearch county data

City property data

Top city rollups for estimated value, assessed value, property tax rate, and tax amount.

Boulder County city-level property value and tax-rate rollups
CityMedian estimated valueMedian assessed valueMedian effective property tax rateMedian tax amount
Boulder$1,032,066$69,4550.60%$5,987
Longmont$569,159$38,7060.65%$3,627
Lafayette$693,349$46,2500.58%$4,067
Louisville$844,775$58,5620.61%$5,158
Erie$763,124$50,8980.77%$5,753
Superior$857,794$59,5000.71%$6,212
Nederland$696,244$44,6660.62%$4,302
Lyons$738,743$48,4880.72%$5,286
Niwot$1,099,944$74,4260.65%$7,348
Allenspark$434,222$27,8330.40%$1,740
FAQ

Boulder County property records FAQ

Common questions about assessor, deed, tax, GIS, and permit records.

How do I find the owners of Boulder County properties?

Use the official Boulder County Property Search for county ownership and parcel records when owner names are available online. Use AssessorSearch property search as a free, easy-to-use option to look up Boulder County properties by address or APN.

Where can I verify assessed value in Boulder County?

Use the official Boulder County Property Search for assessed values, parcel details, exemptions, and property characteristics when those records are available online.

Where can I look up Boulder County property tax bills or payments?

Use the official Boulder County Treasurer Property Taxes for property tax bills, payment history, due dates, or tax collector records.

Where can I find deeds or recorded documents in Boulder County?

Use the official Boulder County Clerk and Recorder Public Search for deeds, mortgages, liens, plats, and other recorded documents. These records are usually separate from assessor property-value records.

Where can I view parcel maps or GIS data in Boulder County?

Use the official Boulder County Property Search (GIS) for parcel maps, map layers, boundaries, and GIS context. GIS maps should be treated as reference tools, not legal surveys.

Can I build a list of Boulder County property owners?

Use Affix by AssessorSearch for county property owner lists, filters, exports, skip tracing, and outreach workflows.

Need many owners? Build targeted property lists with Affix
Related counties

More Colorado property records

Use related county pages when researching nearby property records or comparing official source patterns.

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