Whatcom County Washington Property Record Guide
Search Whatcom County Property Values, Parcel Maps, Taxes and Deeds
The combined Whatcom County Assessor and Treasurer property portal can connect a property’s owner, mailing address, Property ID, 16-digit Geo ID, legal description, tax area, land-use code, acreage, neighborhood, appraisal history, improvements, sales, exemptions, current taxes and delinquent balances.
This guide explains how to select the correct appraisal-year display, search by owner or address, compare Property ID with Geo ID, review the 2026 tax account, prepare for the upcoming 2026 assessment notice, apply for senior or disability relief and locate deeds, liens, plats and recording alerts.
Search owner, address, Property ID or Geo ID
Review appraisal, tax-area and improvement records
Connect Assessor, Treasurer and Auditor systems
Handle appeals, exemptions and delinquent taxes
PARCEL → VALUE → TAX → RECORD
WHATCOM PROPERTY FILE
Property ID and Geo ID
Save
Owner and location
Match
Value and exemptions
Review
Taxes and documents
Connect
EXACT PARCEL VERIFIED
County Assessor
Rebecca Xczar
Assessor office
311 Grand Ave., Suite 106
Editorial verification
August 6, 2026
Current August 2026 position
Understand Which Whatcom Assessment Year You Are Reviewing
The 2026 tax bill is based on the 2025 assessment year. The deadline to appeal the 2025 assessment used for taxes payable in 2026 was October 27, 2025. That deadline has passed.
2026 taxes payable now
Review the 2025 assessment-year values, the 2026 Treasurer statement and the second-half amount due October 31, 2026.
2026 assessment year
This value will be used for taxes payable in 2027. The county states that the regular 2026 valuation notices had not yet been mailed as of early August.
Upcoming appeal opportunity
Most owners will have 30 days from the mailing date printed on the fall 2026 valuation notice to file an appeal.
July 1 was not the only 2026 opportunity: July 1, 2026 was an early-filing deadline for the 2026 assessment year. Owners will generally still receive a notice-specific appeal period after the fall valuation notices are mailed.
Portal display tip: To see the most current ownership and upcoming appraisal-year information, change the Results Display setting to 2026–2027.
Start with the correct office
Assessor vs Treasurer vs Auditor and Board of Equalization
County Assessor
- Property values and appraisal history
- Owner, location and mailing information
- Land, improvements and property type
- Parcel maps and sales information
- Senior and disability exemptions
- Destroyed-property and improvement relief
County Treasurer
- Current and delinquent tax balances
- First-half and second-half payments
- Online, phone, mail and Auto-Pay
- Penalty and interest calculations
- Special assessments and fees
- Real-property tax foreclosure
Auditor and BOE
- Deeds, mortgages and liens
- Recorded-document images and copies
- Property recording alerts
- Formal valuation appeals
- Exemption-denial appeals
- Board hearing decisions
Do not ask the wrong office: The Assessor does not accept regular property-tax payments. The Treasurer does not change assessed value. The Auditor records ownership documents but does not guarantee clear title or automatically decide how a document affects an assessment.
State-system comparison: Washington combines Assessor and Treasurer information in one searchable portal but keeps the office responsibilities separate. For another county-office model, review the existing
Bexar County Tax Assessor-Collector guide.
Choose the Whatcom County Property Task You Need
Find a property record
Search by owner, street address, Property ID, Geo ID, subdivision, condo or land-description fields.
Review the correct year
Distinguish the assessment year from the year in which the resulting tax is payable.
Check or pay taxes
Open View Details, review current and delinquent years and calculate the amount for the intended payment date.
Prepare an appeal
Wait for the 2026 valuation notice or use its mailing date to calculate the normal 30-day deadline.
Apply for tax relief
Review senior, disability, deferral, damaged-property and home-improvement programs.
Find a deed or lien
Search the Auditor’s Digital Research Room by name, file number, document type, parcel or legal description.
Official search workflow
How to Search Whatcom County Property Records
Accept the site terms when prompted.
Continue to the property-search screen before entering any payment information.
Select a search type.
Choose owner, address, Property ID, Geo ID, business name or an advanced land-description field.
Search with fewer terms first.
Use a surname, street number and partial street name or the exact property identifier.
Set the correct results year.
Choose 2026–2027 when checking the newest ownership and upcoming appraisal-year information.
Open every plausible result.
One owner may have a home, agricultural tract, vacant parcel, commercial site, condominium or mobile-home account.
Choose View Details.
Review account, location, owner, appraisal, improvements, taxes, map and payment information.
Save both property identifiers.
Record the Property ID and the 16-digit Geo ID before moving to maps, recorded documents or payment.
Save a dated copy.
Print or save the record because ownership, payment and appraisal information may change after processing.
Fastest search order: Exact Property ID → exact Geo ID → simplified street address → owner surname.
More than an owner search
Whatcom County Property Search Fields Explained
Owner Name
Start with the surname or main business name. Try trusts, estates and prior owners.
Street Number
Enter the numeric portion of the physical address.
Street Name
A partial street name can return parcels containing that word.
Property ID
Shorter portal identifier used to open the county property account.
Parcel / Geo ID
Usually a 16-digit geographic parcel identifier.
Doing Business As
Useful for commercial or personal-property accounts using a trade name.
Subdivision or Condo
Useful for new developments, plats and multiple similar addresses.
Township, Range and Section
Useful for acreage, rural land and legal-description research.
Trailing-zero Property ID tip: The portal explains that when a parcel number ends with zeros, a user may enter the number only through the last non-zero digit and review the returned parcel-order list.
Match These Six Fields Before Paying, Appealing or Buying
Property ID
Match the short account identifier.
Geo ID
Confirm all 16 digits.
Owner
Check current and prior ownership.
Location
Verify the physical address.
Legal description
Compare lot or land section.
Appraisal year
Use the correct year pair.
Stop when fields conflict: Do not pay a bill, appeal a value or rely on a record for closing until the Property ID, Geo ID, owner, location and legal description identify the same parcel.
Save both numbers
Property ID, Geo ID, Tax Statement ID and Auditor File Number
Property ID
The shorter account number used by the combined Assessor and Treasurer portal.
Parcel / Geo ID
The geographic parcel identifier, commonly displayed as a 16-digit number.
Statement ID
Tax-statement identifier connected to a specific tax year and payment schedule.
Auditor File Number
Recording identifier used to retrieve a deed, mortgage, lien or other document.
Best practice: Save all four identifiers when they are available. They reduce confusion between appraisal, tax and recorded-document systems.
How to Read a Whatcom County Property Record
| Property field |
What it explains |
What to verify |
| Property ID |
Portal account used for property and tax lookup. |
Copy it to payment, phone and mail records. |
| Geo ID |
Geographic parcel-number reference. |
Compare it with maps and recorded documents. |
| Tax area |
Combination of taxing districts applied to the parcel. |
City, school, fire, road and special districts. |
| Land-use code |
County code describing the appraised property use. |
Compare with actual use and improvements. |
| Open Space / DFL |
Indicators for current-use or designated-forest-land programs. |
Check eligibility, continued use and removal consequences. |
| Township, range and section |
Public-land-survey reference for rural property. |
Compare deed, survey and Auditor land records. |
| Neighborhood |
Assessor market or appraisal-area grouping. |
Use it when selecting comparable properties. |
| Appraisal history |
Land, improvement and total assessed value by year. |
Check when and why major changes occurred. |
| Improvements |
Buildings, characteristics, size, quality and condition. |
Use permits, plans, photos and measurements. |
| Tax details |
Jurisdiction charges, installments, payments, interest and penalties. |
Tax year, intended payment date and live balance. |
Parcel, plat and sales context
How to Use Whatcom County Map, Plat and Sales Search
Open the exact property record first.
Save the Property ID, Geo ID, legal description, Map ID and neighborhood code.
Select Map Search in the property portal.
Use the top navigation inside the
official portal.
Compare parcel shape and adjoining properties.
This is important for acreage, shoreline parcels, new subdivisions, lot combinations and rural tracts.
Use Plat Search for subdivision records.
Match the subdivision, lot, block and recorded plat information.
Use Sales Search for market evidence.
Filter the correct appraisal period, location, property type and sale characteristics.
Check separate county services.
Use official planning, zoning, permits, septic and water records for development or environmental questions.
Use a licensed survey for legal boundaries.
Online parcel lines and aerial layers are not boundary certification.
PARCEL + PLAT
WATER + AERIAL
SALES + NEIGHBORHOOD
Map limitation: Do not use an online parcel line alone to place a fence, determine shoreline ownership, establish an easement, resolve an encroachment or certify acreage.
Washington market-value system
How Assessed Value Becomes a Whatcom County Tax Bill
Market value
Washington assessors value real property at 100% of market value.
Review sales, condition and property characteristics.
Assessed value
The county value entered for the assessment year.
Check land, improvements and exemptions.
Levy rate
Taxing-district budgets and statutory limits produce rates for the tax area.
Different parcels can have different district combinations.
Tax and assessments
The Treasurer bills property tax plus applicable special assessments and fees.
The certified tax statement controls payment.
Annual appraisal
Real property is valued annually, while approximately one-sixth is physically inspected each year.
January 1 condition
Most valuation is based on the property’s condition as of January 1 of the assessment year.
New construction
New construction may be valued according to its condition as of July 31.
Tax increase without equal value increase
Levy rates, voter-approved measures and special assessments can change the bill.
Value increase without equal tax increase
Budget-based levy calculations can distribute taxes across changing county values.
Portal estimate versus bill
Use the certified Treasurer statement—not an informal estimate—for payment.
Simple estimate: Assessed value × levy rate ÷ 1,000 provides a basic ad valorem estimate when the levy rate is expressed per $1,000. Add applicable special assessments and confirm the certified statement.
2026 notice for 2027 taxes
Whatcom County 2026 Assessment Appeal Timeline
Valuation date
Property is generally valued based on its January 1 condition.
Early filing
July 1 was an early deadline for 2026 assessment appeals.
Notices mailed
2026 valuation notices are expected after August.
Normal deadline
Most owners have 30 days from the mailing date shown on the notice.
Assessor contact
Ask for the valuation basis and correct factual errors.
Board hearing
File a complete petition with evidence of Assessor error.
Further appeal
Board decisions may be appealed to the State Board of Tax Appeals.
Comparable sales
Use relevant market sales near the January 1 valuation date.
Condition evidence
Use dated photos, inspections and repair estimates.
Property-data proof
Use permits, plans, surveys and measurements.
Use restrictions
Document access, septic, wetlands, shoreline or buildability conditions.
Save the valuation notice and envelope.
Use the mailing date printed on the notice to calculate the appeal deadline.
Open the 2026–2027 property record.
Save the new land, improvement and total values.
Contact the Assessor before filing.
Ask which sales, neighborhood and property characteristics were used.
Identify the specific error.
The Board considers value and Assessor determinations—not the tax amount or financial hardship.
File a complete Board petition.
The Board must receive the petition by July 1 or within 30 days of mailing, whichever is later.
Retain proof of timely filing.
Keep the accepted online record, stamped copy or documented delivery.
Late petitions are limited: Washington law permits late petitions only in narrow circumstances. Contact the Board at
360-778-5016 rather than assuming a late appeal will be accepted.
Senior and disability relief
Whatcom County Property-Tax Exemption and Deferral Programs
For a reduction of 2026 property taxes, the applicant generally must satisfy the qualifying age or disability, ownership, occupancy and household-income requirements during 2025.
- At least age 61 by December 31, 2025
- Or unable to work because of disability
- Or qualifying disabled-veteran status
- Ownership of the residence in 2025
- Principal residence occupied over six months
- 2025 household disposable income records
- Federal return or all year-end statements
- Documentation for allowable deductions
Level 1
$0–$37,000
Broadest published level of levy and taxable-value relief.
Level 2
$37,001–$44,000
Published relief includes excess levies, part of the state-school levy and a limited regular-levy reduction.
Level 3
$44,001–$52,000
Published relief generally includes excess levies and part of the state-school levy.
Senior or disability exemption
Reduces qualifying property taxes according to income level and program rules.
Senior or disability deferral
Postpones payment. It is not a tax reduction; the state pays the deferred amount to the Treasurer.
Limited-income deferral
Separate program that can postpone qualifying property taxes or special assessments.
Destroyed property
Property damaged or destroyed may qualify for an assessed-value reduction.
Home-improvement exemption
Certain improvements to a single-family residence may receive a three-year exemption on the improvement value.
Open-space and forest programs
Current-use programs can reduce taxable value but may create continuing-use obligations and removal tax.
Online filing available: The Assessor provides an online senior and disability exemption portal for applications, document uploads and status updates.
Application denial: A denial may be appealed to the Board of Equalization by July 1 or within 30 days after the denial notice was mailed, whichever is later.
Current and delinquent tax lookup
How to Search Whatcom County Tax Records
Search the exact parcel.
Use Property ID, Geo ID, street address or owner name.
Choose View Details.
Open the property rather than relying on the summary result.
Select Pay Taxes or expand tax details.
Review each year, statement ID, first-half base amount, second-half base amount, penalties, interest and payments.
Enter the intended payment date.
For a future or delinquent payment, use Recalculate to obtain the amount due on that date.
Review every unpaid year.
The portal shows current taxes, delinquent taxes and updated interest and penalty information.
Expand the jurisdiction details.
Check which state, county, city, school, fire, port and special districts contribute to the bill.
Save the payment confirmation.
Verify the transaction and later confirm that the tax account reflects the payment.
Nightly data refresh: The Treasurer states that online tax data is refreshed nightly after close of business.
Five official payment routes
Online, Phone, Auto-Pay, Mail and In-Person Payments
Pay online
Use a U.S. checking or savings account or an accepted credit or debit card. A convenience fee applies.
Automated phone payment
Call
855-461-9815 with the Property ID, payment amount and account or card information.
Personal Teller
Call
877-495-2729. A published $5 Personal Teller fee applies in addition to normal payment fees.
Auto-Pay
Enroll a U.S. checking or savings account to deduct taxes automatically on the due date.
Pay by mail
Include the coupon or clearly write each Property ID on the check. Do not mail an unidentified check.
Pay in person or drop box
Visit Suite 104 or use an exterior courthouse payment drop box.
Payment-only mailing address:
Whatcom County Treasurer
PO Box 34873
Seattle, WA 98124-1873
Mail rules: The Treasurer does not accept post-dated checks. The official postmark must be on or before the due date. A late-postmarked payment can be returned for the correct interest and penalty amount.
Phone confirmation: A phone payment is not complete unless the system provides a confirmation number. Write it down and verify the posting.
2026 payment timeline
Whatcom County Property-Tax Due Dates and Penalties
Mid-February
Annual real and personal-property tax statements are typically mailed.
April 30
First-half taxes are due. Bills under $50 must be paid in full.
June 1
A 3% first-half penalty applies to the unpaid amount under the published schedule.
October 31
Second-half taxes are due when the first half was timely paid.
December 1
An 8% second-half penalty applies to the unpaid amount under the published schedule.
3 Years
Foreclosure stage
Missing the first-half deadline: When first-half taxes are not paid by April 30, the entire year’s tax becomes delinquent. Interest and applicable penalty are calculated on the full annual amount.
Weekend or holiday: When a due date falls on a Saturday, Sunday or observed holiday, payment is accepted on the next business day.
How to Read Whatcom County Taxing-Jurisdiction Lines
| Possible bill line |
What it funds |
Why it varies |
| Washington State |
State property-tax levy, including school funding. |
Statewide rates and tax rules. |
| Whatcom County |
County government services. |
County levy and assessed value. |
| County Road |
Road services for qualifying unincorporated areas. |
City parcels may have a different district combination. |
| Flood Control Zone |
Flood-control programs and infrastructure. |
Countywide or zone-specific assessments. |
| School District |
Local school operations and voter-approved measures. |
Bellingham, Ferndale, Lynden, Blaine and other districts differ. |
| Fire District |
Fire protection and emergency services. |
District boundaries and voter-approved levies. |
| City |
Municipal services for property inside city limits. |
Bellingham, Ferndale, Lynden, Blaine and other cities set separate budgets. |
| Port, library or park |
Special-purpose public services. |
District boundaries and local levies. |
| Special assessment |
Flood, road, water, drainage or another local improvement. |
It may not be calculated like ordinary value-based tax. |
Tax-area code: The property record’s tax area summarizes the combination of jurisdictions applied to that parcel. Two similarly valued properties can have different bills when their tax areas differ.
Three-year delinquency threshold
Whatcom County Tax Foreclosure Process
TAX
FORECLOSURE
PATH
3 YEARS
COURT FILING
NOTICE
NOVEMBER SALE
Three years delinquent
State law requires the Treasurer to begin real-property foreclosure when taxes reach the three-year delinquency threshold.
Certificate of delinquency
The Treasurer files with Superior Court, after which additional interest, penalties and foreclosure costs accrue.
Title search and notice
Parties with recorded legal interests are identified and served according to the foreclosure process.
Court judgment
The Treasurer obtains a judgment foreclosing the tax liens and ordering sale.
Redemption deadline
A qualifying owner or recorded-interest party may redeem through close of business on the day before sale.
November auction
The county normally holds its real-property tax-foreclosure auction in November.
Foreclosure payoff restrictions: After April 30 in the foreclosure process, the Treasurer states that only cash, cashier’s checks and money orders are accepted. Personal, business, traveler’s checks and cards are not accepted.
“I need the complete payoff and foreclosure status for Whatcom County Property ID __________ and Geo ID __________ through __________. Please confirm all taxes, interest, penalties, costs, fees and the final redemption deadline.”
Open Official Foreclosure Information
Review the three-year threshold, notice process, redemption rules, auction timing and current sale information.
Auditor land records
How to Search Whatcom County Deeds, Mortgages, Liens and Plats
Save the owner and parcel identifiers.
Copy current and prior names, Property ID, 16-digit Geo ID and legal description.
Search by indexed information.
Use grantor or grantee name, Auditor file number, document date or document type.
Use parcel or legal-description indexing.
Documents recorded after January 1, 1997 are also indexed by Assessor parcel number and legal description.
Compare the complete instrument.
Match parties, recording date, file number, consideration, legal description and related documents.
Order an official copy when required.
A title company, lender, court or government agency may require a certified copy.
| Recorded-document service |
Published cost or availability |
Important note |
| Online document images |
1920 to present |
Search through the Digital Research Room. |
| Historical microfilm |
1853 through 1997 |
Available in the Auditor’s public research area. |
| Regular copy |
$1 per page |
Provide names, file number and dates when possible. |
| Certified copy |
$3 first page, $1 each additional page |
The complete document must be purchased. |
| Assisted pre-1980 search |
$8 per hour |
Applies to qualifying assisted research. |
RECORDING
ALERT
OWNER NAME
16-DIGIT PARCEL
NEW DOCUMENT
EMAIL NOTICE
Property Recording Alert Service: Register names and the 16-digit Assessor parcel number to receive notice of matching recording activity.
Alert limitation: The service does not prevent a document from being recorded and does not determine whether a document is valid or fraudulent.
Title-search warning: Online recorded-document research does not guarantee clear title. Use a title company or qualified attorney for a legal or insured title determination.
What a Whatcom County Buyer Should Check Before Closing
Property ID and Geo ID
Match both identifiers with the deed, title report, tax account and parcel map.
Current owner display
Set the results year to 2026–2027 and compare it with the newest recorded deed.
Tax-area code
Review every city, school, fire, road and special district connected to the parcel.
Current and delinquent taxes
Search all years, statement IDs, installments, penalties, interest and special assessments.
Open-space or forest status
Review continued-use obligations and possible removal tax before changing use.
Senior exemption
Do not assume a prior owner’s personal exemption will continue after transfer.
Recorded instruments
Review deeds, mortgages, releases, liens, easements and plats.
Septic, water and permits
Search the responsible Health and Planning systems separately.
Flood, wetland and shoreline issues
Review official environmental information and obtain professional advice.
Local-area check: Properties in Bellingham, Ferndale, Lynden, Blaine, Birch Bay, Point Roberts, Everson, Nooksack, Sumas and rural Whatcom County may have substantially different tax areas, services, access, flood exposure and development constraints.
Common Whatcom County Property Search Problems
| Problem |
Likely cause |
Practical fix |
| Address search returns nothing |
Street suffix, direction, unit or spelling mismatch. |
Use the number and partial street name, then try owner or Property ID. |
| Current owner is missing |
Wrong appraisal-year display or deed processing delay. |
Select 2026–2027 and check the Auditor file. |
| Property ID search is incomplete |
Trailing zeros or a partial identifier. |
Enter through the last non-zero digit and review the ordered results. |
| Geo ID does not match |
Wrong parcel, parcel split or identifier copied incorrectly. |
Compare all 16 digits and the legal description. |
| Map looks different from deed |
GIS layer, imagery or parcel update timing. |
Use the recorded plat and a licensed survey. |
| First-half amount is still due |
Payment was late, returned or applied to another property. |
Review transactions and contact the Treasurer with confirmation. |
| Payment amount changes |
Interest and penalties depend on the intended payment date. |
Enter the date and select Recalculate. |
| 2025 assessment appeal is requested |
Confusion between assessment year and tax year. |
The deadline for the 2025 assessment used for 2026 taxes was October 27, 2025. |
| 2026 notice has not arrived |
Regular 2026 notices had not yet been mailed as of early August. |
Monitor the BOE page and preserve the notice when received. |
| Recorded alert shows activity |
A matching name or parcel was indexed on a new document. |
Open the document, compare parties and seek legal help when suspicious. |
“I am reviewing Whatcom County Property ID __________ and Geo ID __________ at __________. The online record shows __________, but my deed, valuation notice, tax statement or evidence shows __________. Please confirm which office handles the correction and whether a deadline applies.”
Whatcom County Assessor, Treasurer, Auditor and BOE Contacts
County Assessor
311 Grand Avenue, Suite 106
Bellingham, WA 98225
360-778-5050
Fax: 360-778-5051
County Treasurer
311 Grand Avenue, Suite 104
Bellingham, WA 98225
360-778-5160
Auditor Recording Division
311 Grand Avenue, Suite 103
Bellingham, WA 98225
360-778-5100
Fax: 360-778-5101
Board of Equalization
311 Grand Avenue, Suite 105
Bellingham, WA 98225
360-778-5016
Published office hours
Monday through Friday
8:30 a.m. to 4:30 p.m.
Excluding observed holidays
Same courthouse, different suites: Assessor services are in Suite 106, Treasurer payments in Suite 104, Auditor recording in Suite 103 and Board of Equalization support in Suite 105.
Official action routes
Complete Your Whatcom County Property Task
Title-specific answers
Whatcom County Property Assessor Search and Tax Records FAQs
1. How do I search Whatcom County property records?
Open the official combined Assessor and Treasurer property portal. Search by owner name, street address, Property ID, 16-digit Geo ID, business name, subdivision, condominium or township-range-section information, then open View Details.
2. What is the difference between Property ID and Geo ID?
Property ID is the shorter portal account used to access the property and tax record. Geo ID is the geographic parcel identifier, commonly displayed as a 16-digit number. Save both because different county services may use different identifiers.
3. Which year should I select to see the newest Whatcom property owner?
The property portal instructs users to select the 2026–2027 results display to see the most current ownership and upcoming appraisal-year information.
4. Can I still appeal the value used for my 2026 tax bill?
The 2026 tax bill is based on the 2025 assessment year. Whatcom County states that the deadline to appeal that assessment was October 27, 2025, so the regular deadline has passed.
5. When can I appeal the 2026 assessment used for 2027 taxes?
Most owners will have 30 days from the mailing date shown on the fall 2026 valuation notice. July 1, 2026 was an early-filing deadline, not necessarily the final opportunity for owners who later receive a valuation notice.
6. When are Whatcom County property taxes due in 2026?
The first half was due April 30, 2026. The second half is due October 31, 2026 when the first half was paid on time. When the annual tax is less than $50, the full amount is due April 30.
7. What happens when the first-half tax was not paid by April 30?
The entire annual tax becomes delinquent. Interest is calculated at 1% per month on the full amount due, and the published schedule adds a 3% first-half penalty on June 1.
8. Who qualifies for the Whatcom senior or disability exemption?
Eligibility generally requires qualifying age or disability, ownership, principal-residence occupancy and household disposable income. For 2026 taxes, the county lists a $52,000 household-income ceiling based on 2025 eligibility information.
9. How do I find Whatcom County deeds and liens?
Use the Auditor’s Recorded Document Search through the Digital Research Room. Search by grantor or grantee, Auditor file number, document date or document type. Documents recorded after January 1, 1997 are also indexed by Assessor parcel number and legal description.
10. How long before Whatcom County can foreclose for unpaid real-property taxes?
Real-property foreclosure begins when taxes become three years delinquent. The Treasurer files a certificate of delinquency, obtains a court judgment and normally holds the foreclosure auction in November.
Official Sources and Editorial Verification
Whatcom County Assessor
Valuation, property records, exemptions, maps and office contacts.
Assessor and Treasurer Property Search
Owner, address, Property ID, Geo ID, appraisal, tax and payment records.
Whatcom County Treasurer
Tax billing, collection, payment, special assessments and foreclosure.
Tax Statement Information
April and October deadlines, interest, penalties and small-bill rules.
Board of Equalization
2025 deadline status, 2026 notices and upcoming appeal window.
Auditor Recording Division
Deeds, mortgages, liens, plats and recorded-document search.
What was checked: Assessor and Treasurer search fields, 2026–2027 ownership display, Assessor and Treasurer contacts, 2025 assessment appeal deadline, upcoming 2026 notice process, senior and disability income levels, tax due dates, penalties, payment methods, phone numbers, foreclosure timing, recorded-document indexing and copy fees.
CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with the Whatcom County Assessor, Whatcom County Treasurer, Whatcom County Auditor, Whatcom County Board of Equalization, Washington State Board of Tax Appeals or any payment or records-system provider.
Ownership, appraisal values, tax balances, penalties, fees, deadlines, office hours, elected officials, forms and portal addresses can change. Confirm time-sensitive information with the responsible official office before paying, filing, appealing, purchasing property or making a legal decision.
Last reviewed: August 6, 2026.
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