Boulder County Assessor Property Search
Find Colorado Records by Address, Owner, Account, Parcel, STR and Map
Boulder County Assessor property search starts with the official county property search tool. Use it to look up public property records by address, owner name, street name, subdivision, account, parcel or STR. This guide explains how to find assessed value, Notice of Value details, comparable sales, tax bills, payment due dates, recorded deeds, senior and veteran exemptions, real property appeals, and City of Boulder vs Boulder County property-report confusion.
Use the official Boulder County Property Search at https://maps.bouldercounty.org/boco/PropertySearch. The county search lets you enter an address, owner name, street name, subdivision, account, parcel, or STR. For tax bills and payments, use the Boulder County Treasurer. For deeds, liens, plats and recorded documents, use the Clerk & Recorder’s Recording Division public search.
What Should You Click First for Boulder County Assessor Property Search?
Start with the official tool that matches your actual question. The Boulder County Assessor handles values, property records, NOVs, appeals, exemptions and sales data. The Treasurer handles bills and payments. The Recording Division handles deeds and recorded documents. The City of Boulder has separate property reports for city-level code, enforcement and parcel report context.
I have a street address
Use the Boulder County Property Search. Enter the address in the top search bar, then open the matching property record.
Open property searchI know the owner name
Search all or part of the owner name. Try last name only, trust name, business name or LLC name if the full name does not match.
Search by ownerI need tax bill or payment
Use Boulder County Treasurer Web for property tax records, balances and payments. 2026 due dates are March 2 and June 15 for half payments, or April 30 for full payment.
Open Treasurer searchI need deeds or liens
Use the Clerk & Recorder’s Recording Division public records search for deeds, deeds of trust, liens, plats, foreclosure documents and covenants.
Open recorded documentsI disagree with value
Real property valuation appeals are accepted May 1 through June 8. Online and faxed appeals must be time-stamped by 11:59 p.m. June 8.
Open appeal pageI need senior or veteran exemption
Use Boulder County Assessor exemption pages. Senior exemption on-time deadline is July 15; veteran-related exemption applications are due by July 1.
Open exemption helpBoulder County Assessor Property Search by Address — Step-by-Step Guide
For a house, condo, rental, commercial building, farm parcel, vacant land or mountain property in Boulder County, use the official Property Search tool first. It works across Boulder County, including Boulder, Longmont, Lafayette, Louisville, Nederland, Lyons, Erie portions, Superior portions and unincorporated areas.
Open the official Boulder County Property Search
Go to https://maps.bouldercounty.org/boco/PropertySearch. This is the official county property-search interface connected to Boulder County Assessor data.
Use the search bar correctly
The county tool supports address, owner name, street name, subdivision, account, parcel or STR. Start with the simplest version of the address: house number and street name.
Remove extra words if the result does not appear
Do not add “Boulder County Colorado” inside the address field. If an exact address fails, remove unit numbers, punctuation, street suffixes, and directional words.
Open the matching record and save the account or parcel
Once the record opens, save the account number, parcel number, owner details, property address and valuation information. These identifiers make tax, appeal and deed searches easier.
Move to the right office for the next task
Use the Treasurer for payment questions, the Recording Division for deeds, the Assessor appeals page for value protests, and City of Boulder property reports only when you need city-specific information.
Search tip: If the exact address fails, use only the street name and then filter the results. Boulder County includes rural roads, mountain addresses, subdivisions and multiple municipalities, so shorter searches often work better than exact copy-paste from a private real estate website.
Boulder County Property Search by Owner Name
The official Boulder County search can use owner name, but owner-name searches can fail when a property is held by a trust, LLC, business, estate, spouse, prior owner or recently recorded deed.
Search last name first
For a person, start with the last name only. Add first name only if the result list is too large.
Try legal owner formats
Search trust names, business names, LLC names, family trust wording, estate names or partial owner words.
Use address when possible
If you know the address, address search is usually faster and less error-prone than owner-name search.
Verify recent transfers
If ownership recently changed, verify deed history through the Clerk & Recorder’s recorded document search.
Ownership warning: The Assessor record is not a title report. For legal ownership history, deeds of trust, liens, releases, plats or covenants, use recorded documents and professional title review when needed.
Boulder County Account, Parcel and STR Search — When Address Is Not Enough
Account and parcel search is better than address search when a property has multiple units, a mountain location, agricultural land, subdivision history, a recent split, vacant land, or a tax-bill question. STR can also help when the legal land description matters.
Where to find your Boulder County property identifier
Property Search
Search by address once, then copy account and parcel details.
Notice of Value
Your NOV helps identify the property and appeal deadline.
Tax notice
The Treasurer tax notice helps connect value to the tax bill.
Recorded deed
Deeds can provide legal descriptions and transfer history.
Subdivision search
Useful for platted lots and development parcels.
STR search
Useful when land is identified by section-township-range details.
What Shows in a Boulder County Property Record
A Boulder County property record is for assessment and public property research. It can help you review ownership, location, account details, valuation, sale data and appeal context, but it is not a deed, tax receipt, zoning permit or survey.
Owner name
Owner information maintained for assessment records.
Property address
Physical or situs address tied to the property.
Account number
Useful for tax and property record matching.
Parcel number
Useful for map, parcel and legal-description research.
Assessed value
Assessment value used in the property tax process.
Comparable sales
Assessor sales data can support review or appeal research.
Map context
Search map helps locate parcels and nearby properties.
Appeal timing
NOV and real property appeal windows are time-sensitive.
Assessment vs tax bill: The Assessor estimates and maintains value. The Treasurer bills and collects property taxes. A value change does not automatically explain every tax bill change, because mill levies, districts, exemptions, due dates and payment status also matter.
Boulder County Property Tax Search — Treasurer Bills, Due Dates, Payments and Fees
Use Boulder County Treasurer Web when you need property tax bills, payment status, balances, tax notices, payment methods or due-date help. Do not use the Assessor for tax payment questions.
Search tax record
Use Boulder County Treasurer Web for property tax records and payment information.
Open Treasurer Web2026 half payments
For 2026, Boulder County lists two half-payment due dates: March 2 and June 15.
2026 full payment
For 2026, full property tax payment is due April 30.
Payment fees
The Treasurer page says e-check has no charge to the taxpayer, while credit and debit card payments include processor fees.
Late-payment warning: Boulder County says additional fees are assessed for payments made after August 1, and certified funds are required after September 1. If your payment is late, contact the Treasurer for the exact amount before paying.
Need to pay or verify a bill? Use the official Boulder County Treasurer page and Treasurer Web search.
Open Treasurer PageBoulder County Property Search Map — Address, Owner, Account, Parcel and STR Layers
The Boulder County Property Search tool includes map-based property research. It is useful for confirming a parcel location, nearby parcels, subdivision context and account/parcel details. It is not a legal boundary survey.
Use map for visual confirmation
After searching an address or owner, use the map to confirm you opened the correct property.
Use parcel/account for exactness
Map clicks are helpful, but account or parcel number is better for tax, appeal and document matching.
Use city tools for city reports
If the property is inside the City of Boulder and you need enforcement or city property report details, use the city’s property search by address.
Map is not a survey
County map boundaries should not be used as legal proof for fence lines, easements, setbacks or boundary disputes.
Boulder County Senior Homestead, Veteran Exemption and Tax Deferral Help
Boulder County property tax relief depends on the program. The Assessor handles senior and veteran-related exemption applications, while the Treasurer handles payment and tax deferral questions.
Senior Homestead Exemption
Boulder County lists July 15 as the on-time Senior Exemption deadline. Late applications are accepted July 16 through August 15.
Open senior exemptionVeteran-related exemptions
Boulder County states veteran-related exemption applications must be submitted no later than July 1 to apply to the tax bill received the following year.
Open veteran exemptionSenior Tax Deferral
Starting with taxes due in 2026 and later, Boulder County Treasurer information notes the office again takes tax deferral applications.
Open TreasurerCheck before applying
Eligibility can depend on age, occupancy, ownership length, disability, veteran status, surviving spouse status and state funding rules.
Deadline warning: Exemption and deferral deadlines are not the same as tax payment deadlines or appeal deadlines. Use the official Assessor or Treasurer page for the current program before filing.
Boulder County Property Valuation Appeal — May 1 Through June 8
If you believe your Boulder County real property value or classification is wrong, use the Assessor appeal process during the real property appeal window. For 2026, the county announced real property valuation appeals are accepted May 1 through June 8, 2026.
Review the Notice of Value
The Assessor mails real property Notices of Valuation not later than May 1. Review property details, classification, value and comparable sales.
Collect evidence
Use comparable sales, property condition evidence, incorrect characteristics, photos, appraisal reports or market proof. “Taxes are too high” is not the same as evidence that value is wrong.
File before June 8
Mailed appeals must be postmarked on or before June 8. In-person appeals are accepted through 5 p.m. June 8. Online and faxed appeals must be time-stamped by 11:59 p.m. June 8.
Wait for the Assessor determination
The Assessor’s deadline to mail determinations of property value appeals is August 15.
Appeal to BOE if needed
If you disagree with the Assessor’s determination, you can file a written appeal to the Board of Equalization on or before September 15.
Appeal route: Use the official Boulder County Assessor Real Property Valuation Appeals page before filing.
Open Appeals PageBoulder County Clerk & Recorder — Deeds, Liens, Plats, Covenants and PropertyAlert
Use the Recording Division when you need recorded real estate documents, not only assessment data. The Recording Division provides document types, recording information, grantor/grantee names and legal descriptions when available through Boulder County Public Search.
Search public records
The public search can include deeds, foreclosure documents, liens, covenants, plats, maps, assignments, UCCs and more.
Open recording searchFree watermarked images
Boulder County says free watermarked images are available for viewing, downloading and printing, and non-watermarked copies can be ordered for a fee.
PropertyAlert
Residents can sign up for free PropertyAlert accounts at the Boulder County Public Search portal to monitor recorded activity.
Recording contact
Recording Division phone: 303-413-7770. Email: recording@bouldercounty.gov. Hours listed: Monday through Thursday, 7:30 a.m. to 5 p.m.; closed Fridays.
City of Boulder Property Search vs Boulder County Assessor Search
Many users search “Boulder property records” and land on the wrong government page. Boulder County and the City of Boulder provide different tools.
Use County Assessor for valuation
Use Boulder County Property Search for owner, address, parcel, account, assessment and property value research across the county.
Use City of Boulder for city property reports
The City of Boulder address search displays Property Report for Parcel and Enforcement Summary Report for Address.
Open city address searchUse Treasurer for tax bills
Tax bills and payments are Boulder County Treasurer functions, not City of Boulder code or enforcement reports.
Check the property location
A property may be in Boulder County but outside the City of Boulder. Use the county property record first when the question is assessment, tax, ownership or valuation.
Boulder County Assessor Office Location, Phone, Email and Hours
The Boulder County Assessor’s Office lists its main contact at 1325 Pearl Street, 2nd Floor, Boulder. Verify service availability before visiting because some county offices use Monday through Thursday public hours and closed-Friday schedules.
Boulder County Assessor’s Office
1325 Pearl Street, 2nd Floor, Boulder, CO 80302
Assessor: Cynthia Braddock
Phone: 303-441-3530
Fax: 303-441-4996
Email: assessor@bouldercounty.gov
Physical address: 1325 Pearl Street, 2nd Floor, Boulder, CO 80302
Mailing address: P.O. Box 471, Boulder, CO 80306-0471
Hours shown on official Assessor pages: Monday through Thursday, 7:30 a.m. to 5 p.m.; closed Friday. Verify before visiting.
Related Property Search Guides That Help Boulder County Users
These internal links are selected by user intent. Use them when comparing nearby Colorado county assessor systems, checking metro-area parcels, or confirming which county owns the tax and assessment record.
Denver County Assessor Property Search
Useful if your Colorado property search shifts from Boulder County to Denver city/county records.
https://assessorpropertysearch.org/denver-county-assessor-property-search/Jefferson County Assessor Property Search
Helpful for nearby Front Range users comparing parcels west and south of Boulder County.
https://assessorpropertysearch.org/jefferson-county-assessor-property-search/Arapahoe County Assessor Property Search
Useful for Denver metro owners comparing property, value and tax-search workflows.
https://assessorpropertysearch.org/arapahoe-county-assessor-property-search/Douglas County Assessor Property Search
Good for comparing Colorado appeal deadlines, property search and tax bill workflows.
https://assessorpropertysearch.org/douglas-county-assessor-property-search/Adams County Assessor Property Search
Helpful for north Denver metro properties that may be outside Boulder County boundaries.
https://assessorpropertysearch.org/adams-county-assessor-property-search/El Paso County Assessor Property Search
Useful for Colorado users comparing another large county assessor and tax search system.
https://assessorpropertysearch.org/el-paso-county-assessor-property-search/Official Boulder County Assessor, Treasurer, Recording and Exemption Links
Use these official sources first. This page is an independent guide and does not store Boulder County property records. The official portals below are where the actual assessor, tax, deed, map and exemption records are maintained.
Boulder County Assessor
Main Assessor page for property search, valuation, appeals, exemptions and Assessor contact details.
https://bouldercounty.gov/departments/assessor/Official Property Search
Search by address, owner, street name, subdivision, account, parcel or STR.
https://maps.bouldercounty.org/boco/PropertySearchReal Property Valuation Appeals
Appeal window, deadlines, determination mailing and BOE appeal timing.
https://bouldercounty.gov/property-and-land/assessor/appeals/Appeals Calendar
Specific real property protest dates, postmark rules and online/fax deadline time.
https://bouldercounty.gov/property-and-land/assessor/appeals/calendar/Boulder County Treasurer
Property tax payment methods, due dates, fees and Treasurer office information.
https://bouldercounty.gov/departments/treasurer/Treasurer Web Tax Search
Official Boulder County Treasurer tax search and payment portal.
https://treasurer.bouldercounty.org/treasurer/web/Property Tax Due Dates
2026 full-payment and half-payment due dates and late-payment warnings.
https://bouldercounty.gov/property-and-land/treasurer/taxes/due-dates/Search Public Records – Recording
Deeds, liens, plats, covenants, foreclosure documents and other recorded documents.
https://bouldercounty.gov/records/recording/search-public-records/Senior Homestead Exemption
Senior exemption deadline, late filing window and Assessor instructions.
https://bouldercounty.gov/property-and-land/assessor/senior-exemption/Veteran Related Exemptions
Veteran-related exemption deadline and Assessor filing guidance.
https://bouldercounty.gov/property-and-land/assessor/veteran-exemption/FAQ — Boulder County Assessor Property Search
These answers cover the real questions Boulder County property owners, buyers, renters, agents and investors usually search: owner lookup, address search, account number, tax bill, recorded documents, appeals and exemptions.
Disclaimer and Source Verification
AssessorPropertySearch.org is an independent property records information guide. We are not Boulder County, the Boulder County Assessor, the Boulder County Treasurer, the Boulder County Clerk & Recorder, the City of Boulder, or a government agency. We do not store property records or provide legal, tax, appraisal, survey or title advice.
This page explains how to use official Boulder County and City of Boulder public property resources. Property data, tax records, appeal deadlines, exemption rules, office hours, payment systems and online tools can change. Always verify the final record, deadline, amount, map layer and application requirement directly with the official office before making financial, legal or real estate decisions.
Official Sources Verified — May 2026
- https://bouldercounty.gov/departments/assessor/
- https://maps.bouldercounty.org/boco/PropertySearch
- https://bouldercounty.gov/property-and-land/assessor/appeals/
- https://bouldercounty.gov/property-and-land/assessor/appeals/calendar/
- https://bouldercounty.gov/departments/treasurer/
- https://treasurer.bouldercounty.org/treasurer/web/
- https://bouldercounty.gov/property-and-land/treasurer/taxes/due-dates/
- https://bouldercounty.gov/records/recording/search-public-records/
- https://bouldercounty.gov/property-and-land/assessor/senior-exemption/
- https://bouldercounty.gov/property-and-land/assessor/veteran-exemption/
Find the Right Property Record, Tax Bill, Deed or Assessor Search Route
Use this helper before searching county property records. It helps you choose the right office, prepare the right details, avoid wrong-office mistakes, and review property records safely.
Property Search Route Finder
Choose what you have and what you want to find. The tool will suggest the best search route and common mistake to avoid.
Parcel / APN / PIN Format Helper
Parcel numbers are formatted differently by county. Try these variations if your official search does not return results.
Assessor, Tax Collector, Recorder or GIS?
Select your issue and this tool will show the office that usually handles it.
Simple Property Tax Estimate Helper
This is a general estimate only. State and county tax rules differ, so always verify final bills with the official tax collector, treasurer or county tax office.
Exemption / Appeal Readiness Checklist
Use this before applying for an exemption or challenging a value. Missing proof is one of the biggest reasons users waste time or miss deadlines.
Property Record Review Checklist
Review these fields before relying on any assessor, appraiser, auditor, property appraiser, tax or deed record.