Jefferson County Colorado Property Records Guide
Jefferson County CO Property Records, PIN Search & Tax Lookup
Jeffco property research is easiest when you separate appraisal records from tax records. The Jefferson County Assessor maintains actual values, assessed values, property characteristics, ownership information, sales history, neighborhoods, PIN/Schedule numbers and parcel identifiers. The Treasurer separately handles tax bills, payment history, balances and tax liens.
This 2026 guide shows exactly how to search by owner, address, PIN/Schedule Number, AIN/Parcel ID or recorded document, how to read the property card, how Colorado assessment rates convert actual value into taxable assessed value, and what to do if you need a value appeal, tax payment, address correction, GIS parcel map or recorded deed.
Owner, address, PIN, AIN and document searches
2026 valuation and appeal deadline guidance
Assessor versus Treasurer versus Recorder routing
Tax due dates, payments, exemptions and abatements
Jefferson County Assessor
Scot Kersgaard
Assessor phone
303-271-8600
Real Estate Information
303-271-8666
Assessor office
Suite 2500, Golden
Last reviewed
August 11, 2026
Jeffco Property Value and Tax Status in August 2026
The regular 2026 real-property Assessor appeal deadline has passed. Jefferson County lists the 2026 real-property appeal period as May 1 through June 8. Owners who filed an appeal should receive a Notice of Determination by August 15, and eligible owners who remain dissatisfied generally have until September 15, 2026 to appeal that determination to the County Board of Equalization.
Appeal already filed?
Watch for the Notice of Determination and compare the final Assessor value with the evidence you submitted.
Still disagree?
Review the Board of Equalization instructions immediately. September 15, 2026 is the important next deadline for an eligible determination appeal.
Unpaid 2025 taxes?
The 2026 first-half, full-payment and second-half due dates have passed. Use the live Treasurer portal for the current amount rather than the original tax notice.
2026 is an intervening valuation year: Jefferson County explains that the broader 2025 reappraisal established values using a June 30, 2024 appraisal date and sales from July 1, 2022 through June 30, 2024. In 2026, owners generally receive a value notice when a property has a valuation-changing modification such as new construction.
Assessor, Treasurer or Clerk & Recorder: Who Handles What?
Jefferson County separates valuation, tax collection and recorded-document functions. Starting with the right office prevents the most common property-record mistakes.
County Assessor
- Actual and assessed values
- PIN/Schedule and AIN/Parcel IDs
- Property characteristics
- Owner and mailing information
- Sales and valuation history
- Exemptions and property appeals
- Parcel maps and appraisal records
County Treasurer
- Property-tax notices
- Current and prior-year taxes
- Tax payments and receipts
- Tax authority allocations
- Tax liens and redemption
- Special assessments
- Tax authentication
Clerk & Recorder
- Deeds and recorded transfers
- Liens and releases
- Plats and declarations
- Real-estate index records
- Recorded instrument images
- Certified document copies
- Document recording
Office-routing rule: The Assessor determines property value but does not collect your tax payment. The Treasurer collects the tax but does not change the Assessor’s valuation. A deed affecting title must first be recorded with the Clerk & Recorder before the Assessor can use the recorded document to update ownership records.
State-system comparison: Colorado calls this office the County Assessor. Florida generally uses the term Property Appraiser. If you are comparing systems, see our existing Volusia County Property Appraiser search and tax guide.
Choose the Jeffco Property Task You Need
Find a property record
Search by owner, address, PIN/Schedule Number, AIN/Parcel ID or document/instrument information.
Check property value
Review actual value, assessed value, sales history, neighborhood and property inventory.
Find or pay property tax
Switch to the Treasurer portal for tax notice, balance, tax district, mill levy, payment history and payment.
Appeal an Assessor value
Review the current Notice of Determination and the September 15 Board of Equalization deadline if applicable.
Change mailing address
Submit the real-property address change to the Assessor rather than the Treasurer.
Find a deed or lien
Use the Clerk & Recorder real-estate records database for recorded instruments and scanned documents.
Jump to Your Jefferson County Property Task
How to Search Jefferson County Assessor Property Records
The official Jeffco Property Records Search supports several identifiers. Use the most precise identifier you have, but begin broadly if the number is unknown.
Owner search
Useful when you know the individual, trust or business name but not the property address.
Address search
Best for a normal residential or commercial lookup when the physical address is known.
PIN / Schedule Number
Strong exact-match option. The portal accepts Schedule numbers such as six-digit and nine-digit formats.
AIN / Parcel ID
Useful for parcel-specific searches and cross-checking map information.
Document / Instrument
Useful when a recording or transfer document connects to the Assessor property record.
Parcel map
Use the ASPIN mapping system when you need graphical parcel context and adjoining parcels.
Open the official Assessor Property Records Search.
Start at Jefferson County Assessor Property Records Search.
Select the search type.
Choose Owner, Address, PIN/Schedule Number, AIN/Parcel ID or the other available record-search method.
Keep owner searches broad at first.
Start with a surname or principal business name. If too many matches appear, add more identifying information.
Simplify an address that does not match.
Try the street number and main street name before adding directional prefixes, street types or unit numbers.
Use PIN/Schedule Number for precision.
If you already have the number from a valuation notice, tax notice or prior property record, use it instead of guessing address formatting.
Select a result to open the property details.
The official portal updates search results as you type. Select the correct result rather than relying on the first row.
Compare ownership and location.
Verify owner, property address, PIN/Schedule, AIN/Parcel ID and property type before relying on value or tax information.
Review valuation and sales history.
Use prior-year values and recorded sales to understand whether a current number represents a broader reappraisal, a property change or a transaction.
Open map and Treasurer links when needed.
Assessor records can connect you to parcel maps and Treasurer tax information, but those systems serve different purposes.
Save the identifying numbers.
Copy the PIN/Schedule Number and AIN/Parcel ID. They make later Assessor, Treasurer and map searches easier.
Portal limitation: Jefferson County warns that mobile devices can have limitations with large result sets and that some exports have row-count limits. Narrow your search before trying to export a large list.
Verify These Six Jeffco Fields Before Using the Record
PIN / Schedule
Match the exact property identifier.
AIN / Parcel ID
Confirm the mapped parcel.
Owner
Check the record owner or entity.
Site address
Verify physical property location.
Tax year
Keep payable year separate from value year.
Property type
Residential, commercial, vacant or personal property.
Legal-description warning: Jefferson County’s Assessor search warns that the displayed legal description can be incomplete and is for internal informational purposes. Do not copy that shortened description into a deed or other legal conveyance.
What Jeffco Assessor Property Record Fields Mean
| Record field | What it tells you | What to do with it |
|---|---|---|
| PIN / Schedule Number | Primary Assessor search identifier associated with the property record. | Copy it before calling the Assessor or searching tax information. |
| AIN / Parcel ID | Parcel identifier used to connect the record with parcel mapping. | Use it for ASPIN map research and parcel-level verification. |
| Actual Value | The Assessor’s value before the statutory assessment rate is applied. | Start here when evaluating whether the property valuation itself appears incorrect. |
| Assessed Value | Taxable assessment base produced from actual value and the applicable assessment rules. | Use this with mill levies when understanding property-tax calculations. |
| Sales History | Recorded transfer and sales information associated with the property. | Confirm whether a transfer was a normal market sale before treating it as a comparable. |
| Valuation History | Prior-year actual or assessed value history. | Compare years to identify reappraisal changes or property modifications. |
| Neighborhood | Assessor neighborhood or market-area grouping used in valuation analysis. | Use the Neighborhood Dashboard and qualified sales to research comparable properties. |
| Property Inventory | Land and improvement characteristics used in appraisal. | Check area, use, construction and land details for factual errors. |
| Tax District / TAG | Group of taxing authorities associated with the parcel. | Compare with Treasurer tax allocations and mill levies. |
| Treasurer Tax Information | Link or reference to the separate tax-collection record. | Use it for the actual bill, payment status, interest and tax allocation. |
Use Jeffco ASPIN Parcel Maps to Confirm Property Location
Jefferson County’s ASPIN parcel application lets users view and select parcels graphically, print maps, query by Parcel ID and Schedule Number, open static parcel maps and connect to Assessor appraisal information.
Open the official Parcel Maps page.
Use Jefferson County Parcel Maps and launch ASPIN.
Accept the official disclaimer.
The application requires users to acknowledge its map and data limitations before relying on the interface.
Search with Parcel ID or Schedule Number.
These identifiers are more reliable than visually guessing a parcel from roads or aerial imagery.
Select the parcel graphically.
Compare the highlighted parcel with the Assessor property record, surrounding lots and physical location.
Open connected appraisal data.
Use the map link to move back to tabular Assessor information when you need value, ownership or property-characteristic details.
Do not treat GIS as a legal survey.
For boundary disputes, easements, legal access or conveyance questions, obtain the relevant recorded documents and professional survey or legal guidance when necessary.
How Jefferson County’s 2026 Property Value Was Established
Sales study period
Jefferson County says the 2025 reappraisal analyzed qualifying sales from July 1, 2022 through June 30, 2024.
The study period supports the county’s mass-appraisal analysis.
Appraisal date
The reappraisal uses a June 30, 2024 appraisal date.
Sales are analyzed and adjusted to the applicable valuation date.
Actual value
The Assessor establishes the property’s actual value using the applicable appraisal process.
This is not yet the final taxable assessed value.
Assessed value
Colorado assessment rules are applied to actual value before tax authorities apply mill levies.
Residential property can have separate school and local-government assessed-value calculations.
2026 intervening year: A property may receive a 2026 valuation change because of new construction, demolition, subdivision, combination, classification change or another qualifying property modification even though the major reappraisal occurred for 2025.
2025/2026 Valuation Information
Open Jeffco’s reappraisal documents, qualified sales, time-trend information and appeal resources.
Review Your Property
Check PIN, value history, sales history, inventory, neighborhood and tax-authority information.
Review Appeal Guidance
Understand comparable sales, determination notices and Board of Equalization next steps.
How Jeffco Actual Value Becomes Assessed Value
Colorado property tax is not calculated directly from the full actual value. The Assessor applies the applicable assessment rules to create assessed value, and taxing authorities then apply mill levies.
2025 taxes payable in 2026
School districts
7.05%
Other local government
6.25%
Jefferson County publishes these dual residential assessment rates for tax year 2025, payable in 2026.
2026 taxes payable in 2027
School districts
7.05%
Other local government
6.8%
Jefferson County’s current calculator guidance also identifies a legislative adjustment affecting the first $700,000 of residential actual value for the 2026 tax year. Use the county calculator rather than applying a simple percentage when estimating the final result.
Do not mix tax years: “2025 payable 2026” and “2026 payable 2027” use different local-government residential rates. Always confirm the year shown on the Assessor and Treasurer record before calculating.
Actual value
Determined by the Assessor from the property’s valuation process.
Assessment rate
Converts applicable actual value into assessed value under Colorado law.
Mill levy
Applied by the relevant taxing authorities to the assessed value.
Basic concept: Actual Value → statutory assessment calculation → Assessed Value → mill levies → property tax. Exemptions, legislative adjustments, special assessments and multiple taxing authorities can affect the final result.
Use Jefferson County’s Property Tax Calculator
Open the official explanation and estimator before relying on a hand calculation.
How to Search Jefferson County Property Tax Records
The Assessor record tells you how the property was valued. The Treasurer record tells you what was billed, which authorities receive the tax, what has been paid and what remains due.
Open the Treasurer Property Records Search.
Use Jefferson County Treasurer Property Records Search.
Choose the strongest search field.
Search by address, owner or property identifier using the available Treasurer search routes.
Open the correct account.
Compare property location and identifier with the Assessor record before reviewing or paying tax.
Check the tax district and mill levy.
The tax record can list the tax district, combined mill levy and each participating tax authority.
Review original bill and amount paid.
Separate the original charge from abatements, payments, interest, fees and current balance.
Read the Tax Allocation section.
This shows how the total tax is distributed among county, school, fire, library, municipal and other applicable taxing entities.
Review payment history.
Confirm payment date, receipt, payment type and amount before making an additional payment.
Use the live balance for delinquent taxes.
Do not calculate interest from a saved statement when the portal can provide the current position.
No tax notice received? Jefferson County states that failure to receive the tax notice does not relieve the property owner’s responsibility to pay on time. Tax notices are generally mailed by the end of January; use the online portal if yours is missing.
Jefferson County 2026 Property-Tax Due Dates
Tax notice
Treasurer tax notices are mailed by the end of January.
First installment
The 2026 first-half payment deadline was March 2.
Full payment
One-time full payment was due April 30.
Second installment
The second-half payment deadline was June 15.
Current position
All ordinary 2026 payment dates are now in the past.
Unpaid account?
Search the Treasurer portal for current interest and balance.
Colorado installment choice: Owners generally pay either the full amount by the full-payment deadline or use the two-installment schedule. Do not pay both schedules.
How to Pay Jeffco Property Taxes and Save Proof
Online bank account
Pay through the Treasurer portal using a checking or savings account.
County lists no additional fee
Debit or credit card
Cards are accepted through the payment system, but vendor and/or card processing fees apply.
Review fee before submit
Pay by phone
Use the Treasurer’s automated payment line at 866-898-2919.
Bank-account payments have no additional fee
Pay by mail
Use the payment coupon and the applicable mailing instructions. Signature-required deliveries and bank bill-pay payments should use the Golden Treasurer office address.
Keep mailing evidence
Payment drop box
Jeffco lists an interior atrium box and a drive-up box near the Courts and Administration Building. No cash.
Put PIN or address on envelope
Pay in person
Current-year taxes can be paid at the Treasurer’s office during published business hours.
No appointment required
Posting time: Jefferson County says online and telephone payments can take two to four business days to process and appear in the portal. The payment date submitted through the shopping cart or telephone system is honored as the paid date.
Returned payment: The Treasurer currently lists a $20 fee for returned or insufficient-fund checks. Monitor your bank account after an electronic payment because a transaction can still be rejected by the financial institution.
Paying off an existing tax lien is different: Jefferson County instructs taxpayers to contact the Treasurer for payoff information. Published guidance says tax-lien payoffs are limited to cashier’s check, money order, cash or wire and that credit cards and personal checks are not accepted for those payoffs.
Open Current Jeffco Payment Options
Verify current payment methods, mailing instructions, drop boxes, wire instructions, processing rules and restrictions.
Jefferson County Property Value Appeal Timeline
Notice of Value
Review actual value, inventory, sales and property characteristics.
Assessor appeal
2026 real-property filing period ran May 1 through June 8.
Determination
Jeffco says a Notice of Determination is mailed by August 15.
Board of Equalization
Eligible owners generally have until September 15 to continue the appeal.
Board decision
The county says BOE hearings conclude by November 1 and decisions follow shortly thereafter.
Today: August 11, 2026. The regular Assessor filing period has closed, but the Board of Equalization deadline has not yet arrived for property owners who qualify to continue an appeal from their Assessor determination.
Evidence to organize before a BOE appeal
- Notice of Value
- Assessor Notice of Determination
- PIN/Schedule and property address
- Property inventory corrections
- Comparable sale addresses
- Comparable sale dates and prices
- Photos showing relevant condition
- Repair or damage documentation
- Appraisal or market evidence when useful
- Copies of evidence already provided to Assessor
Comparable-sales help: Jefferson County’s Real Estate Information line at 303-271-8666 can provide inventory information by phone for up to three residences when you supply addresses, Schedule numbers or owner names.
“I filed a 2026 Jefferson County property-value appeal for PIN/Schedule __________. I received a Notice of Determination showing an actual value of __________. Please confirm the Board of Equalization filing requirements, September 15 deadline, evidence format and how I should submit my petition.”
Open Official Jeffco Appeal Instructions
Review current determination, comparable-sale and Board of Equalization guidance before filing.
When a Jefferson County Abatement Petition May Help
Jefferson County explains that the abatement process can potentially correct an erroneous valuation for up to two prior years. The process is directed to the Board of County Commissioners and can take several months.
Possible use
A taxpayer believes a qualifying prior-year value or tax was erroneous and the issue fits the statutory abatement process.
Evidence matters
Attach documents supporting the claimed error instead of simply stating that the prior value seemed too high.
Important restriction
Jeffco states that when value was already protested for the year in question, an abatement or refund cannot be made on grounds of overvaluation.
Appeal versus abatement: Do not treat abatement as an automatic replacement for a missed current-year appeal. The available remedy depends on the tax year, issue and whether the value was previously protested.
Review Abatement Petition Instructions
Read the official county procedure and supporting-document requirements before filing.
Jeffco Senior, Disabled Veteran and Qualified Senior Property Relief
Senior Property Tax Exemption
Jefferson County lists July 15 as the normal application deadline for the Senior Property Tax Exemption.
Disabled Veteran Exemption
The primary residence must meet the applicable ownership and occupancy requirements; Jeffco lists July 1 as the application deadline.
Qualified Senior Primary Residential Classification
This temporary classification is available for tax years 2025 and 2026 for qualifying seniors who moved and lost a prior senior exemption.
August 11, 2026 status: The published July 1 disabled-veteran deadline and July 15 senior-exemption deadline have passed for this year. Do not assume a late application will receive the same rights or treatment; contact the Assessor for the applicable option.
Qualified Senior classification: Jefferson County says the normal filing deadline is March 15, with late applications accepted through July 15. The county warns that applicants filing after March 15 do not receive appeal rights for that classification.
Open Jeffco Property Exemption Forms
Review Senior, Disabled Veteran, surviving-spouse, Gold Star and qualified-senior forms and instructions.
How to Change a Jefferson County Property Mailing Address
Real-property mailing-address changes belong with the Assessor. Changing the address with the Treasurer, DMV or post office does not replace the Assessor’s property-record process.
Open the Assessor change-of-address page.
Use Jefferson County Change of Address Forms.
Select Real Property Change of Mailing Address.
Business personal-property addresses use a separate form.
Prepare the PIN/Schedule Number.
The online form requires the identifying property number.
Enter the property location and owner information.
Match the owner information to the Assessor property record.
Enter the new mailing address.
Review city, state, ZIP code and country before submitting.
Provide authorization if you are not the owner.
Jefferson County instructs a non-owner to provide written authorization from the property owner.
Do not enter sensitive financial information.
Jeffco warns that the online form is transmitted by unsecured email and should not contain Social Security, bank, routing, card, passport or password information.
Save your submission evidence.
Keep the confirmation until the updated mailing address appears in the property record.
How to Search Jefferson County CO Deeds, Liens and Recorded Documents
Jefferson County’s recording database contains decades of searchable real-estate and other public records, including deeds, liens, plats, declarations, certificates and related instruments.
Open the Jefferson County Records Search page.
Use Jeffco Records Search and select the official search route.
Choose the Real Estate tab.
The county’s instructions direct property users into the Real Estate records category.
Select Search Real Estate Index.
Use the index before attempting to identify a scanned document.
Choose Combined Name Search.
Start with the owner, seller, buyer, trust, lender or other relevant party.
Enter party name in the requested format.
The county’s instructions use Last Name, First Name and ask users to select the appropriate party type.
Review scanned images carefully.
Compare reception or instrument number, recording date, parties and legal description before treating a record as connected to your parcel.
Jeffco Recording and Copy Fee Decoder
| Service | Published fee | What to know |
|---|---|---|
| Standard letter/legal-size recording | $43 per document | Flat fee for most standard documents. |
| Transfer deed state fee | $0.10 per $1,000 | Applies when consideration exceeds $500, in addition to applicable recording charges. |
| Digital/electronic copy | Free | Certified copies are not available digitally. |
| Paper copy under 20 pages | Free | Current county fee schedule applies. |
| Paper request 20+ pages | $5 + $0.25/additional page | Verify total before requesting a large record set. |
| Document certification | $1 per document | Use when an official certified copy is required. |
| Plat copy | $2 per page | Separate from recording a new plat. |
| Large-format plat recording | $40 per document | Jeffco currently directs large-format recording through approved eRecording vendors. |
Ownership change process: The Assessor says it can only use documents recorded with the Jefferson County Clerk & Recorder to change Assessor ownership records. The Assessor does not provide deed forms or legal advice about transferring title.
Verify Current Recording Fees
Check current standard-document, plat, UCC, copy and certification charges before submitting or ordering records.
Jeffco Property Record Scenarios: What to Check First
| Situation | Records to review | Best next action |
|---|---|---|
| Home buyer | Assessor record, deed, PIN, AIN, sales history, parcel map and Treasurer tax status. | Verify title and tax information before relying on a listing or seller screenshot. |
| Current homeowner | Owner, mailing address, actual value, assessed value, property inventory and taxes. | Correct factual errors and monitor value notices promptly. |
| 2026 appeal filer | Notice of Value, appeal evidence and Notice of Determination. | Prepare for the September 15 BOE deadline if still dissatisfied. |
| Mortgage escrow owner | Treasurer balance, payment history and lender escrow disbursement. | Confirm lender payment before submitting a duplicate owner payment. |
| Inherited property | Recorded deed or estate instrument, Assessor ownership and current mailing address. | Record necessary title documents first, then monitor Assessor ownership update. |
| Property with incorrect data | Land area, improvement characteristics, property class and Assessor inventory. | Gather direct proof such as survey, plans, photos or recorded documents. |
| Prior-year valuation issue | Prior notices, prior appeal history, value record and tax record. | Review whether the abatement process can legally address the issue. |
| Investor or researcher | Owner, PIN/AIN, sales, neighborhood, qualified sales, tax district and recorded documents. | Cross-check Assessor data with Recorder documents and Treasurer records. |
Jefferson County Assessor and Treasurer Office Details
Real Estate Information
Assessor property-record and inventory help
303-271-8666
303-271-8666
Business Personal Property
Business-property record support
303-271-8693
303-271-8693
Published Assessor hours
Monday–Thursday
7:30 a.m.–5:00 p.m.
7:30 a.m.–5:00 p.m.
Published Treasurer hours
Monday–Thursday
7:30 a.m.–5:00 p.m.
Closed Fridays
7:30 a.m.–5:00 p.m.
Closed Fridays
Before traveling: Office hours and temporary closures can change. Use the official Assessor or Treasurer page before making a special trip.
Jeffco Assessor Property Search Problems and Fixes
| Problem | What to try | Correct office |
|---|---|---|
| Address returns no result | Remove unit, street type or directional wording and search the house number plus main street name. | Assessor |
| Owner search is too broad | Add first name or use property address, PIN/Schedule or AIN instead. | Assessor |
| Owner name looks outdated | Check the Clerk & Recorder for the latest recorded deed and allow time for Assessor ownership processing. | Recorder → Assessor |
| Mailing address is wrong | Submit the Real Property Change of Mailing Address form to the Assessor. | Assessor |
| Tax payment is missing | Allow the published two-to-four-business-day posting period and compare bank activity before paying again. | Treasurer |
| Tax notice never arrived | Search the Treasurer portal and verify your Assessor mailing address. | Treasurer + Assessor |
| Actual value seems wrong | Review sales, inventory, neighborhood and appeal status rather than calling the Treasurer. | Assessor |
| Assessment rate looks different | Check whether you are viewing 2025 payable 2026 or 2026 payable 2027 and whether the line is school or local-government assessed value. | Assessor |
| Need property boundary | Use ASPIN for map context, then use a survey or recorded plat for legal boundary work. | Assessor / Recorder |
| Need a deed or lien | Search the Real Estate index by party name and document information. | Clerk & Recorder |
| 2026 Assessor appeal deadline passed | If you timely appealed, review your Notice of Determination and September 15 BOE deadline. Otherwise review whether another statutory remedy such as abatement is actually available. | Assessor / BOE |
| Prior-year tax lien exists | Contact the Treasurer for an exact payoff and accepted payment method. | Treasurer |
“I am researching Jefferson County property PIN/Schedule __________ at __________. I need help with __________. The Assessor/Treasurer record currently shows __________. Please confirm which record controls this issue and the exact next step, document or deadline I should use.”
Jeffco Property Search Final Action Center
Use the appropriate official system after you have identified the correct property and office.
Assessor Property Search
Owner, address, PIN/Schedule, AIN, values, sales and property characteristics.
Treasurer Tax Search
Tax notice, balance, mill levy, allocation, payment history and online payment.
ASPIN Parcel Map
Search parcels graphically with Schedule Number or Parcel ID.
Recorded Documents
Find deeds, liens, releases, plats and other real-estate instruments.
Jeffco County Property Assessor Search & Tax Records FAQs
1. How do I search Jefferson County Colorado property records?
Use the official Jefferson County Assessor Property Records Search. You can search by owner, address, PIN/Schedule Number, AIN/Parcel ID and available document or instrument information. Open the matching record and verify the property identifier, owner, address and property type before relying on the value.
2. What is a Jeffco PIN or Schedule Number?
The PIN/Schedule Number is an important Assessor property identifier used to locate a specific Jefferson County property record. Save it because it can help with Assessor searches, Treasurer research, parcel maps, appeals and office calls.
3. What is the difference between the Jeffco Assessor and Treasurer?
The Assessor identifies, describes and values property and maintains appraisal records, ownership information and exemptions. The Treasurer sends property-tax notices, collects taxes, maintains payment records and handles tax-lien and redemption functions.
4. What were the 2026 Jefferson County property-tax due dates?
For 2025 taxes payable in 2026, Jefferson County lists March 2, 2026 for the first installment, April 30 for full payment and June 15 for the second installment. As of August 11, 2026, all three dates have passed, so unpaid owners should use the live Treasurer balance.
5. What are the Jefferson County residential assessment rates for 2025 taxes payable in 2026?
Jefferson County publishes a 7.05% residential assessment rate for school-district taxes and 6.25% for other local-government taxes for tax year 2025 payable in 2026. Do not confuse these rates with the separate 2026 payable 2027 calculation.
6. Can I still appeal my Jefferson County property value in August 2026?
The regular 2026 Assessor appeal deadline of June 8 has passed. Owners who timely appealed should receive a Notice of Determination by August 15 and, when eligible, generally have until September 15, 2026 to appeal the determination to the County Board of Equalization.
7. Can I use an abatement petition if I missed the regular property-value appeal?
An abatement is a separate statutory process and is not an automatic replacement for a missed appeal. Jefferson County says an erroneous valuation can potentially be corrected for up to two prior years, but an overvaluation claim cannot be refunded through abatement when the value for that year was already protested.
8. How do I change the mailing address on a Jeffco property record?
Submit the Real Property Change of Mailing Address form to the Jefferson County Assessor. The form requests the PIN/Schedule Number, property location, owner information and new mailing address. A non-owner must provide written owner authorization.
9. Where do I search Jefferson County Colorado deeds and liens?
Use the Jefferson County Clerk & Recorder records database. Open the Real Estate section, choose the Real Estate Index, use Combined Name Search and enter the relevant party name and party type before opening scanned records.
10. Can I use the Jeffco Assessor parcel map as a legal survey?
No. ASPIN is useful for graphical parcel research, Parcel ID searches, Schedule Number searches and map context, but parcel-map information should not replace a professional survey or the recorded legal documents needed for a boundary, title or conveyance decision.
Official Sources and Editorial Verification
Jefferson County Assessor
Property-record services, contacts, hours and Assessor information.
Property Records Search Guide
Search fields, record disclaimer and property-search contact details.
2025/2026 Valuation
Reappraisal study period, current appeal status, assessment-rate documents and valuation resources.
Jefferson County Treasurer
Tax due dates, property-tax services, liens and payment information.
Property-Tax Payment Options
Online, telephone, mail, drop-box, wire and in-person payment instructions.
Clerk & Recorder
Recording, real-estate records and document services.
What was checked for this update: Assessor search fields, 2025/2026 valuation rules, August 2026 appeal position, residential assessment rates, property-tax due dates, payment methods, office contacts and hours, mailing-address procedures, exemption deadlines, abatement guidance, parcel mapping and Recorder fees.
CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with Jefferson County, the Jefferson County Assessor, Treasurer, Clerk & Recorder, County Board of Equalization or any third-party government portal provider.
Property values, assessment rates, tax balances, interest, fees, deadlines, exemptions, office hours, elected officials, portal interfaces and Colorado law can change. Verify time-sensitive information with the responsible official office before paying, filing an appeal, transferring title, recording a document or making a legal or financial decision.
Editorial verification date: August 11, 2026.
Slug: jeffco-assessor-property-search