Seattle Property Tax bills for 2026 reflect a King County property tax rate near 0.99 percent, pushing the median Seattle homeowner’s levy to roughly $8,000 despite a modest dip in assessed values; this rise appears in every Seattle property tax news 2026 update and drives the need for a reliable Seattle property tax calculator to gauge monthly costs. Homeowners can pull their Seattle real estate tax assessment instantly via the King County Department of Assessments portal at kingcounty.gov/en/dept/assessor or call (206) 296‑7300 for direct assistance, and the same site lists the Seattle property tax due dates 2026 alongside payment deadlines that fall on October 31 for the second half of the fiscal year. The county’s online payment center lets you settle balances, set up mortgage escrow property tax contributions, and view the latest Seattle property tax news 2026 about levy adjustments tied to voter‑approved bonds and the 1 percent annual valuation cap. Knowing these dates and rates helps you avoid Seattle property tax delinquency penalties and positions you to plan for any forthcoming Seattle property tax increase.
Seattle Property Tax appeals begin with a timely filing to the Seattle property tax appeals board, usually no later than the later of July 1 or 60 days after your assessment notice, and the King County assessor office (email Assessor.info@kingcounty.gov) can supply the official “how to appeal Seattle property tax” forms. Qualified owners may qualify for Seattle property tax exemptions, including Seattle senior citizen property tax relief, veteran survivor grants, and the new Seattle property tax abatement for energy upgrades that can lower the taxable value by up to 10 percent. If you overpay, the Seattle property tax refund process issues credits within 30 days, and any outstanding liens trigger Seattle property tax lien procedures that can be resolved by contacting the King County Recorder’s Office at (206) 477‑6620. For condo owners and commercial investors, separate Seattle condo property tax rates and Seattle commercial property tax guidelines apply, while historic Seattle property tax history timeline data shows a gradual shift toward higher assessments that support city services and infrastructure.
Search Seattle City Property Tax
Seattle city property tax records sit inside the King County system because Seattle falls under King County tax administration. The King County Department of Assessments runs the parcel lookup tool, often called eReal Property Search, which accepts street address, parcel number, or tax account number. Each search returns the assessed value, levy code, tax account ID, and a printable tax statement.
Gather the items in the table below before you start. These fields speed up the lookup and reduce the chance of an empty result page. If you know only a street name, the system lists every parcel match on that street within Seattle city limits.
| Search Field | Where to Find It |
|---|---|
| Street address | Closing paperwork, mortgage statement, or tax bill |
| Parcel number | Top-right corner of the tax statement (10-digit code) |
| Tax account number | Header section of any past tax statement |
| Condo unit number | Deed or HOA paperwork, often labeled “Unit” or “#” |
After the parcel loads, click “Property Detail Report” to see the full valuation history, square footage, year built, and levy breakdown. Use the print-to-PDF option on your browser to save the record. The portal provides links to recorded documents through the King County Recorder’s Office for deed verification.
Seattle Property Tax Rates for the Current Year
Seattle property tax rates combine state school levies, county levies, city levies, and special district levies into a single total rate. The total appears on every tax statement as a dollar amount per $1,000 of assessed value.
Recent reports place the King County effective rate for Seattle near 0.87 percent, equal to about $8.70 per $1,000 of assessed value. Voter-approved measures can raise or lower the total by adding bonds or replacing expiring levies. Washington state law caps revenue growth from existing properties, limiting how fast bills can rise year over year on any individual parcel.
Each rate component on the bill plays a different role:
- State school levies set by the Washington State Legislature
- King County general levies set by the King County Council
- City of Seattle levies set by the Seattle City Council and voters
- Special district levies from port, library, fire, and hospital districts
- Bond levies tied to voter-approved construction and capital projects
Review the line-item breakdown on your tax statement each year. New voter-approved measures appear as separate lines with their own dollar amounts per $1,000.
King County Real Estate Tax Assessment Process
King County uses mass appraisal methods to value every property in Seattle. The process compares recent sales of similar properties, adjusts for differences, and applies the result to each parcel. The Department of Assessments revalues properties each year based on the previous calendar year’s sales data.
Valuation notices go out in the second quarter of each year. If you disagree with the value, the notice includes a deadline and instructions for filing an appeal. The notice lists the parcel, the prior year value, the new value, and the estimated tax impact in dollars.
The assessment cycle follows a steady schedule:
- Sales data collection runs from January through March.
- The valuation model runs from April through May.
- Valuation notices mail in late May through June.
- The appeal window opens on the notice mailing date.
- The appeal window closes on July 1 or 60 days after the notice, whichever is later, under RCW 84.40.038.
Commercial properties follow a separate revaluation cycle in some years. The King County Assessor publishes a revaluation schedule listing which property types get reassessed in which year. Check the schedule before you plan an appeal.
Seattle Property Tax Payment Deadlines and Methods
King County sends tax statements each February for the first half of the year and each October for the second half. The second half payment is due by October 31. Late payments receive interest and penalties starting the day after the deadline.
You can pay online, by mail, in person, or through a mortgage escrow account. The King County Treasury Operations office processes all payments. Mail payments to the address printed on the statement to ensure proper posting and faster processing.
Choose the payment option that fits your situation:
- Online payment by eCheck or credit card through the King County payment portal at https://payment.kingcounty.gov/Home/Index?app=PropertyTaxes
- Mail payment by check or money order to King County Treasury at 201 S. Jackson St., Suite 710, Seattle, WA 98104
- In-person payment at the King Street Center cashier window
- Mortgage escrow payment where the lender pays on your behalf from collected funds
Set up reminders two weeks before each deadline. Missing the deadline triggers interest charges starting the day after the due date. Pay online for the fastest confirmation and the lowest processing delay.
How to Appeal a Seattle Property Tax Assessment
Seattle property tax appeals follow a process set by Washington state law under RCW 84.40.038. The deadline to file is the later of July 1 of the assessment year or 60 days after the valuation notice is mailed. The King County Board of Equalization hears appeals for King County parcels, including Seattle city properties.
To file, complete the petition form and submit it to the Board of Equalization. Include evidence showing the assessed value exceeds market value. Common evidence includes comparable sales, a recent appraisal, or photos showing physical issues that lower value.
Work through the appeal process in order:
- Review the valuation notice for errors in size, year built, or features.
- Gather comparable sales from the past 18 months in your neighborhood.
- Complete the Board of Equalization petition form with your contact details.
- Submit the petition by the deadline with all required attachments.
- Attend the hearing in person, by phone, or by paper review request.
You can file a paper review appeal if you do not want to attend a hearing. Paper review appeals rely on the documents you submit, and the Board issues a decision by mail. Refer to the King County Board of Equalization for current processing timelines.
Seattle Property Tax Appeals Board
The King County Board of Equalization reviews property tax appeals filed by Seattle and other King County property owners. Board members review evidence, listen to testimony, and issue written decisions. The Board has authority to lower, raise, or leave the assessed value unchanged based on the evidence presented.
Board decisions can be appealed further to the Washington State Board of Tax Appeals. Most appeals resolve at the county level without going to the state board. The Department of Assessments must follow Board orders and adjust the tax bill if a value reduction occurs.
For appeal forms, hearing dates, and Board contact information, refer to the official King County Department of Assessments and Board of Equalization pages on the King County website.
Seattle Property Tax Exemptions
Seattle property tax exemptions lower the taxable value of qualifying properties. Washington state law sets the exemption categories. King County administers these programs on behalf of the City of Seattle. The most common exemptions apply to seniors, disabled homeowners, veterans, and charitable organizations.
You can claim only one exemption per property in most cases. The exemption amount depends on the program, the applicant’s income, and the assessed value. Some exemptions freeze the taxable value, while others reduce it by a fixed dollar amount.
Exemption categories cover these groups:
- Homeowners aged 61 or older with qualifying income limits
- Homeowners with qualifying disability status from the Social Security Administration
- Veterans with service-connected disabilities rated by the VA
- Religious organizations that own and use the property for worship
- Nonprofit organizations that use the property for their stated mission
Apply for exemptions through the King County Department of Assessments. Income limits and exemption amounts change each year, so check the current figures before you file your application.
Senior Property Tax Relief in Seattle
Seattle senior property tax relief combines state and county programs. The state offers a senior exemption that reduces the taxable value by a set amount. King County adds a property tax deferral program for low-income seniors who want to postpone payment until a later date.
To qualify for the senior exemption, you must be at least 61 years old, own and live in the home, and meet the income limit. The exemption freezes the taxable value at the year you first qualify, so future levies do not push your bill higher each year. Recent state legislation allows certain low-income seniors to exempt up to 60 percent of their home value or a set dollar cap from property taxes.
Senior homeowners can choose from several relief options:
- Senior exemption that removes a portion of the home’s value from taxation
- Value freeze that locks the taxable value at the qualifying year amount
- Property tax deferral that postpones payment until sale or death
- Additional state grant for very low-income seniors with extra financial need
Recent changes expanded eligibility for the deferral program. The state Legislature passed new rules that raise income thresholds and lower interest on deferred amounts. File both the exemption and the deferral application to receive the full benefit.
Seattle Property Tax Reduction Programs
Seattle property tax reduction programs help low-income homeowners stay in their homes. The programs include the property tax deferral, the senior exemption, and the disability exemption. Each program has its own rules, but all share the goal of reducing the tax burden for owners who need help paying the bill.
You can stack certain programs together. A senior who also has a disability may qualify for both the senior exemption and the disability exemption. The King County Assessor’s office reviews each application and applies the highest exemption allowed by law.
Reduction programs include the following options:
- Senior deferral with an income limit set by the state Department of Revenue, updated yearly
- Disability deferral with an income limit set by the state Department of Revenue, updated yearly
- Hardship deferral reviewed case by case by the county assessor
- Veteran grant with no income limit for service-connected disability ratings
Apply early in the year to receive the full benefit on the current tax bill. Late applications can apply to future years, but the current year bill remains due at the regular deadlines.
Seattle Property Tax Refund and Overpayment Recovery
The Seattle property tax refund process returns money when you overpay. Overpayments happen for several reasons: a successful appeal that lowers value, a duplicate payment, or an exemption applied after the bill went out. King County Treasury Operations processes refunds for all of these cases.
Refunds issue within 30 to 60 days of the credit appearing on your account. The refund returns to the original payment method. For escrow accounts, the refund goes back to the lender, who credits it to your mortgage balance or escrow account.
Refund triggers and the matching actions include the following:
- Appeal reduction: no action needed because the refund issues automatically
- Duplicate payment: contact Treasury Operations to request a refund
- Exemption applied late: refund appears on the next bill as a credit
- Calculation error: file a written request with the Assessor’s office
Track your account on the King County payment portal. The portal shows credits, debits, and the current balance. Contact Treasury Operations if a credit does not refund within 90 days of appearing on your account.
Delinquency Penalties and Lien Procedures
Missing a property tax deadline starts the delinquency process. The county charges interest starting the day after the due date. The interest rate is set by state law and compounds monthly. After three years of delinquency, the county can foreclose and sell the property at auction.
Tax liens attach to the property, not the owner. The lien stays with the parcel through any sale or transfer. Buyers should check the tax status before closing to avoid inheriting a previous owner’s unpaid debt.
Delinquency progresses through these stages:
- Day after the due date: interest begins accruing
- 30 days late: first penalty tier applied to the unpaid amount
- One year late: tax lien recorded with the county against the parcel
- Three years late: foreclosure action may begin under state law
Pay delinquent taxes as soon as possible to stop further interest. The King County Treasury Operations office accepts partial payments and works with owners on payment plans in hardship cases.
Seattle Condo Property Tax Rates
Seattle condo property tax rates follow the same overall rate as single-family homes, but the assessed value calculation differs. The King County Assessor values condos based on comparable sales of similar units in the same building or nearby buildings. Building-wide factors like HOA fees, condition, and amenities affect value.
Each condo unit gets its own tax account and bill. The total bill combines the unit’s value with the building’s pro-rata share of land value. New construction condos may receive partial exemptions for the first years, depending on filing with the Assessor’s office.
Common condo factors that affect value include:
- Floor level where higher floors often appraise higher
- View quality where water or city views add value
- Building age where newer buildings command higher values
- HOA dues where high monthly dues can lower value
- Parking and storage where included spaces add value to the unit
Review your condo’s valuation each year and compare it to recent sales in your building. If your value looks high, the appeal process works the same way as for single-family homes and follows the same deadlines.
Commercial Property Tax Rules in Seattle
Seattle commercial property tax rules follow the same levy rate as residential properties, but the assessment method differs. Commercial properties are valued based on income, sales comparison, and cost approaches. King County uses a four-year revaluation cycle for most commercial properties.
Income-producing properties receive value estimates based on net operating income and market cap rates. A drop in rental income can lower the assessed value, which may justify an appeal. Commercial owners should track net income changes and report them during the appeal window.
Commercial property types use different valuation methods:
- Office buildings valued by the income approach with a market cap rate
- Retail space valued by sales comparison and the income approach
- Industrial property valued by the cost approach with depreciation
- Multifamily rental property valued by the income approach with expense ratio
- Hotels valued by the income approach with room revenue calculations
Commercial property owners can file a Property Tax Reduction request when income drops. The reduction applies to the current year and the following year, depending on the filing date and the size of the income change.
Property Valuation Methods Used by King County
King County property valuation methods rely on three standard approaches: sales comparison, cost, and income. The Assessor’s office uses mass appraisal models that process thousands of parcels at once. The model updates each year with new sales data from the previous calendar year.
The sales comparison approach looks at recent sales of similar properties. Adjustments account for differences in size, condition, and location. The cost approach estimates what it would cost to rebuild the property, minus depreciation. The income approach values properties based on the income they produce.
Each method works best for different property types:
- Sales comparison works best for single-family homes and condos
- Cost approach works best for new construction and special-use buildings
- Income approach works best for rental, commercial, and investment properties
Physical inspections happen on a rotating cycle, not every year. Most appeals rely on sales comparison data because it is the most common method for Seattle residential properties and the easiest evidence to gather.
Mortgage Escrow and Seattle Property Tax
Mortgage escrow property tax accounts collect tax payments monthly with your mortgage payment. Your lender holds the funds in an escrow account and pays King County Treasury when the bill comes due. This setup helps homeowners avoid missed payments and late penalties by spreading the cost over 12 months.
Each year, the lender reviews the tax amount and adjusts the monthly escrow collection if needed. A higher tax bill means a higher monthly payment going forward. The lender sends an annual escrow statement that shows the past year’s payments and the projected next-year amount.
Escrow accounts typically cover these items:
- Property tax paid twice a year to King County Treasury
- Homeowner insurance premium paid annually or monthly from escrow
- Flood insurance required for properties in designated flood zones
- Reserve cushion equal to two months of escrow payments held in the account
Review your escrow statement each year. If the tax bill rose sharply, contact your lender to confirm the new monthly payment. You can request an escrow account review if you think the collection is too high for the actual tax due.
Property Tax Records and Document Access
King County property tax records stay open to the public. The Department of Assessments and the Recorder’s Office both offer online access. Search the Assessor’s portal for valuation data, levy codes, and tax account history. Search the Recorder’s portal for deeds, liens, and recorded documents.
The King County Recorder’s Office provides public access to recorded real estate documents, including deeds, mortgages, liens, easements, and plat maps. Each document has a recording number you can use to order certified copies.
Record types and their sources include the following:
- Valuation history available through the Department of Assessments portal
- Tax statement available through the King County Treasury payment portal
- Deed history available through the Recorder’s Office public search
- Lien records available through the Recorder’s Office public search
- Property tax lien procedures handled by Treasury Operations and the Recorder’s Office
Use the search tools together for a full property profile. The valuation data shows what you owe. The recorded documents show who owns the property and what encumbrances exist on the title.
Seattle Property Tax History
Seattle property tax history shows steady growth in both rates and total collections. The King County total tax bill for all properties crossed $8.4 billion, driven by new voter-approved levies and rising home values. The 1 percent cap on existing property revenue has kept individual bills from spiking overnight, but new construction adds to the total each year.
Local levies have grown faster than the state school levy over the past decade. King County voters passed new measures for mental health crisis centers, homeless services, and parks. The City of Seattle passed measures for housing, transit, and public safety.
Recent levy changes include the following:
- Mental health crisis centers levy added a countywide property tax increase of 14 cents per $1,000
- Homeless hotel funding levy supported temporary housing across the county
- School construction bond levy funded a local school district six-year program
- City of Seattle housing levy supported affordable housing projects
Track ballot measures in the primary and general elections. New measures can appear on any ballot, and most property tax increases in King County need voter approval before they take effect on the next tax bill.
Contact, Local Details, and Map
For property tax questions in Seattle, contact the King County Department of Assessments. The office handles valuation, exemptions, and appeal petitions. Walk-in customer service is available at the King Street Center during regular business hours. For Treasury and payment questions, contact King County Treasury Operations by calling the phone number listed on the official King County property tax payment page.
| Department | Contact Details |
|---|---|
| King County Department of Assessments | https://www.kingcounty.gov/en/dept/assessor |
| Direct Public Search Portal Link | Use the eReal Property Search tool on the King County Assessor website |
| Physical Address | King Street Center, 201 South Jackson Street, Seattle, WA 98104 |
For recorded documents such as deeds and liens, contact the King County Recorder’s Office. The Recorder’s Office also handles property tax lien procedures and document recording for real estate transactions.
| Department | Contact Details |
|---|---|
| King County Recorder’s Office | https://www.kingcounty.gov/en/dept/recorder |
| Direct Public Search Portal Link | Use the public document search tool on the King County Recorder’s Office website |
| Physical Address | King County Recorder’s Office, 201 South Jackson Street, Seattle, WA 98104 |
Frequently Asked Questions
Seattle property tax bills are managed by King County. Knowing how to find, pay, and contest a tax statement helps homeowners avoid penalties and keep costs predictable. The county’s online portal, phone lines, and email contacts let you get the data you need quickly.
How can I look up my Seattle property tax bill online?
Visit the King County eReal Property Search page and enter your street address, parcel number, or tax account ID. The system returns the assessed value, levy codes, and a printable statement. For help, call the assessor’s office at (206) 296‑7300 or email Assessor.info@kingcounty.gov. The portal updates daily, so you always see the latest figures.
What are the 2026 Seattle property tax payment deadlines?
Payments are due in two installments. The first installment must be paid by April 30, 2026, and the second by October 31, 2026. Late payments incur a 5 % penalty plus interest. Mail checks to King County Treasury, 201 S. Jackson St., Suite 710, Seattle, WA 98104, or use the online payment link on the county website.
How do I calculate my Seattle property tax using the 2026 rate?
Take the assessed value from your tax statement, then multiply by the effective rate of about 0.99 %. For example, a home valued at $850,000 would owe roughly $8,415. A quick calculator is available on the King County assessor site; just input the value and the rate is applied automatically.
What steps should I follow to appeal a Seattle property tax assessment?
First, download the appeal kit from the assessor’s website. Fill out the petition, include comparable‑sale data, and mail it to the Board of Equalization before the deadline, which is the later of July 1 or 60 days after you receive the notice. Contact the assessor’s office at (206) 296‑7300 for any questions about required evidence.
Which exemptions are available for Seattle seniors in 2026?
Seniors 61 years or older may qualify for the senior exemption, which reduces taxable value by a set amount, and a value‑freeze that caps annual growth. Income limits apply; check the latest thresholds on the King County website. To apply, submit the form online or mail it to the assessor’s office, and keep a copy of your approval for future reference.