Address Lookup in King County unlocks a complete property address search experience, letting anyone find a parcel number, owner name, or tax details with just a street address or ZIP code. By entering the exact street address, city, or even a partial address, users can instantly pull up address records that include legal description, assessment values, and ownership history. The system’s address database connects each property to its GIS map, showing parcel boundaries, neighboring lots, and the physical location on an interactive map. Whether you need to verify a mailing address, locate a property on a map, or discover the property type—residential, commercial, or vacant land—this search method provides reliable, up‑to‑date information straight from the King County Assessor’s office, eliminating the guesswork of outdated or missing records.
Address Lookup also supports advanced queries such as address lookup by parcel number, owner name, or city, making it simple to find property tax information, account numbers, and the latest ownership transfers. Users can explore address verification tools to confirm a property’s legal description, assess taxable value, or identify the correct property location when an address seems incorrect or has recently changed. By leveraging the address search online portal, residents, real‑estate professionals, and researchers gain quick access to comprehensive property details, ensuring accurate decisions without the frustration of incomplete address records.
How to Search Address Lookup
Searching for property records through Address Lookup in King County is a direct process that gives you access to official data managed by the King County Assessor’s Office. The eRealProperty search portal connects a physical street address, parcel number, including king county wa, or owner name to detailed property records stored in the county’s address database. You can start a query using a complete street address, a ZIP code, a city name, or even a partial address when you only have fragments of the information. The portal then displays property records, tax data, parcel boundaries, and ownership history tied directly to that address point.
Official Search Portal: https://blue.kingcounty.com/Assessor/eRealProperty/default.aspx
Steps to Search
- Open the King County Assessor eRealProperty search portal in your web browser using the official URL listed above.
- Select your preferred search method from the available options, such as street address, parcel number, or owner name.
- Enter the requested search field, making sure the street number, street name, and ZIP code match the official records.
- Click the search button to run the query against the address database and pull matching property records.
- Review the results page, which displays the property address, parcel number, owner name, tax account, and an interactive map link.
- Click any result row to open the full property record card showing assessment values, legal description, and ownership history.
Search Methods for Property Address Lookup
The King County Assessor’s Office supports several search methods so you can locate property records using the information you already have. Each method pulls from the same property address database, but the entry point changes based on whether you have a full street address, a city name, a ZIP code, a parcel number, or an owner name. Knowing which method fits your situation saves time and produces cleaner results.
Search by Street Address
A street address lookup is the most common entry point because most people already know the house number and street name. Type the full street number, street name, and ZIP code into the search field, and the system returns the matching parcel, owner name, and tax account. This method works well for finding a single-family home, a commercial building, or a vacant lot when you have the mailing address or situs address in hand.
Search by City
Searching by city lets you browse every property record tied to a specific municipality inside King County, such as Seattle, Bellevue, Renton, or Federal Way. This approach is helpful when you know the general area but not the exact street. The results list groups properties by neighborhood, street name, and parcel number, making it easy to scan and select the correct property address.
Search by ZIP Code
A ZIP code search narrows the address database to a single postal code, which speeds up results when you want to focus on one delivery zone. Each property that falls inside that postal code appears with the full street address, parcel ID, and account number. This method works well for verifying address information across an entire neighborhood or checking property tax records for a defined section of the county.
Search by Parcel Number
If you already have the parcel number, this lookup returns the exact property record tied to that identifier without needing the street address. Surveyors, title companies, and researchers often use this approach because a parcel number is a permanent reference that does not change even when a street name or mailing address changes. The results page then shows the legal description, lot number, and block number connected to that parcel.
Search by Owner Name
An owner name search lets you locate a property when you know who holds the title but not the exact street address. The system matches against the current owner name field and returns every parcel under that person or entity. Each result row displays the situs address, mailing address, parcel number, and tax account so you can confirm the right match before opening the full property record card.
Search by Partial Address
When you only have a fragment of the information, a partial address search helps you narrow possibilities. Typing just a street number, a street name, or a neighborhood keyword pulls every record that contains those characters. The results page lists every potential match, and you can then compare the ZIP code, parcel number, and property type to identify the correct property address.
Search Addresses on a Map
The map-based address lookup connects a street address to a visual representation of the parcel. You can pan and zoom across King County, click any parcel boundary, and see the property address, owner name, and parcel number tied to that land area. This approach is helpful when you need to verify the physical location, check neighboring properties, or confirm a street name against an interactive GIS map.
Address Search Results
Once your search completes, the results page presents a structured set of identifiers that confirm you have the correct property. These fields act as the foundation for every deeper query, from tax payments to ownership history. Each result row gives you the data needed to verify the address and decide whether to open the full property record card.
Property Address
The property address field shows the situs address, which is the physical location recognized by the county for tax and assessment purposes. This address is the primary identifier used on parcel maps, deed records, and property tax bills. When the situs address differs from the mailing address, both appear so you can verify which one applies to your search.
Mailing Address
The mailing address displays where tax bills, assessment notices, and official correspondence are delivered, and it may differ from the situs address. Owners sometimes use a post office box, a separate residence, or a property management company address. Confirming the mailing address helps ensure you reach the correct party for tax payments or property transfer records.
Parcel Number
The parcel number is a unique numeric identifier assigned to each property by the King County Assessor’s Office. This number stays with the land through every ownership transfer, even when the street address changes. You can use the parcel number to move between the address search portal, GIS parcel maps, and recorded deed documents without losing the property.
Property Account Number
The property account number ties the parcel to the tax account held by the King County Treasury. Tax bills, payment status, and delinquent balances are tracked under this number. When you call the Assessor’s Office or pay taxes online, the account number is the fastest way to pull the correct record.
Property Owner
The current property owner field shows the name on the most recent deed recorded with the county. For individuals, the owner name is listed exactly as it appears on the recorded property documents. For entities, the legal entity name is displayed so you can verify ownership before running additional searches.
Property Type
The property type classification identifies whether the parcel is residential, commercial, agricultural, vacant land, industrial, or multifamily. This classification shapes the assessed value, tax calculation, and applicable exemptions. Knowing the property type also helps when comparing neighboring parcels or researching land use patterns.
Property Location
The property location section lists the city, ZIP code, and any neighborhood or subdivision tied to the parcel. This helps confirm the geographic placement of the address point and supports address verification when records are outdated. The location data also feeds the GIS map view for parcel boundary visualization.
Property Information From an Address
After confirming the address, the property record card presents detailed property information that describes the land, the structure, and the legal framework behind the parcel. These fields are drawn directly from assessment records maintained by the King County Assessor’s Office and updated on a regular cycle.
Property Identification
Property identification combines the parcel number, account number, and property address into a single reference block. This block is used by every internal county system, from tax billing to recording deeds. Having these identifiers in front of you reduces errors when cross-checking property records across multiple sources.
Parcel Details
Parcel details include the lot number, block number, subdivision name, and plat reference that define the exact piece of land. Surveyors and title researchers rely on these fields when verifying legal boundaries and easements. The lot and block numbers also appear on recorded documents such as deeds and lien releases.
Legal Description
The legal description provides a written definition of the property using metes and bounds, lot and block, or section and township language. This description is the official record used in property transfers and recorded deeds. When the legal description conflicts with the street address, the legal description controls the parcel boundary on the GIS map.
Property Classification
The classification code identifies how the county categorizes the parcel for assessment purposes, such as single-family residential, multifamily, commercial, industrial, or agricultural. Classification affects the tax rate and the appraisal method applied to the land and any buildings. The code also drives exemption eligibility for programs like the senior exemption or the current use program.
Land Information
Land information lists the acreage, square footage, topography, and any site improvements that affect value. The assessor records land size, view, waterfront access, and traffic count when those elements apply. These details influence the assessed value of the land portion of the property and appear in the assessment records.
Building Information
Building information includes the square footage of the structure, year built, number of stories, construction quality, and condition rating. The assessor also tracks features such as basements, garages, fireplaces, and heating systems. These elements feed the building portion of the assessed value and support property tax information accuracy.
Assessment Information
Assessment information shows the assessed value, appraised value, and taxable value for the most recent tax year. The values are recalculated each year based on the county’s revaluation cycle and physical inspection schedule. The assessment information section also displays the effective date so you can confirm the data vintage.
Address and Property Ownership
Ownership data linked to an address helps you confirm who controls the parcel, how long they have held title, and who held it before. This information is useful for real estate research, outreach, and verifying legal standing before a transaction.
Current Property Owner
The current property owner field displays the name on the most recent recorded deed. For individual owners, the full legal name is shown. For business entities, the registered company name appears. The owner mailing address may also be displayed alongside the situs address so you can confirm where official notices should be sent.
Ownership Information
Ownership information includes vesting language such as joint tenants, community property, or sole ownership. This language defines how title is held and what happens to the property when ownership changes through death, divorce, or sale. Title companies and attorneys rely on this field when preparing deeds and reviewing property transfer records.
Ownership History
Ownership history tracks previous property owners going back through recorded deed transactions. The history shows the grantor, grantee, recording date, and deed reference for each transfer. Researchers use this record to trace property lineage, confirm liens, or investigate historical transactions tied to the parcel.
Owner Mailing Address
The owner mailing address is the address where tax bills and official notices are delivered. This address may match the situs address, or it may point to a post office box, including phone lookup, a relative, or a property management company. Confirming the owner mailing address helps ensure tax bills, code violation notices, and legal correspondence reach the correct party.
Recent Ownership Transfers
Recent ownership transfers show the most recent deed recordings affecting the property, including sale price when available. These transfers are pulled from recorded documents filed with the King County Recorder’s Office. Each entry shows the recording date, document type, and instrument number so you can request copies of the underlying deed.
Address and Property Tax Information
Property tax records are a primary reason many users run an address lookup. The King County Assessor’s Office and the King County Treasury work together to publish tax account data tied to each parcel. Once you have the property address or parcel number, the tax section shows the account balance, assessed value, and payment status.
Property Tax Account
The property tax account is the financial record tied to the parcel, maintained by the King County Treasury. The account number connects the address to the tax bill, payment history, and any outstanding balances. When you pay taxes online or by mail, the account number directs the payment to the correct parcel.
Assessed Value
The assessed value is the dollar amount the assessor places on the land and improvements for ad valorem tax calculation. King County uses a revaluation cycle that adjusts assessed values based on market data and physical characteristics. The assessed value appears alongside the appraised value and taxable value so you can compare each figure.
Taxable Value
The taxable value is the portion of the assessed value subject to taxation after exemptions and statutory limits are applied. Senior exemptions, home improvement exemptions, and other programs reduce the taxable value from the full assessed value. The taxable value multiplied by the levy rate produces the annual property tax bill.
Tax Year
The tax year field identifies the assessment cycle the values belong to, such as 2025 or 2026. King County assesses property as of January 1 of each year, and the tax bills go out later in the cycle. The tax year is critical when comparing values year over year or researching the effect of a recent ownership transfer.
Property Tax Amount
The property tax amount is the total levy billed for the parcel in the current cycle. The amount combines the county levy, city levy, school levy, and any special purpose assessments. The exact figure changes each year based on levy rates, ballot measures, and changes in taxable value.
Tax Payment Status
The tax payment status shows whether the current bill is paid, pending, or past due. The status also lists the last payment date, the amount paid, and the remaining balance. Researchers and buyers rely on this field to confirm that taxes are current before a transaction closes.
Delinquent Tax Information
Delinquent tax information lists any unpaid taxes from prior years, along with penalties and interest. Delinquent balances can lead to tax lien sales or foreclosure if not resolved. The county publishes a separate list of properties with delinquent taxes, but the parcel record also shows the cumulative delinquent amount tied to the address.
| Tax Field | Description |
|---|---|
| Tax Account | Unique account number tied to the parcel for billing |
| Assessed Value | County valuation of land and improvements |
| Taxable Value | Portion of assessed value subject to taxation |
| Tax Year | Assessment cycle the values belong to |
| Tax Amount | Total levy billed for the current cycle |
| Payment Status | Paid, pending, or past due |
| Delinquent Balance | Unpaid taxes from prior years plus penalties |
Address and Parcel Mapping
Mapping tools add a visual layer to the address lookup by showing where each parcel sits in the county. The GIS map system ties the address point to a parcel boundary, surrounding properties, and the street network. This view helps users verify physical location and study the area around a property.
Property Location Map
The property location map centers on the address point and displays the parcel outline in relation to streets and other parcels. You can zoom in to see driveway placement, structure footprint, and any features drawn by the assessor. The map also supports measuring tools for acreage and distance.
Parcel Boundaries
Parcel boundaries show the legal shape of the property as defined by the recorded plat or survey. The boundary lines are drawn from recorded documents and maintained in the GIS parcel data layer. Boundary accuracy depends on the quality of the underlying survey, so the county marks some parcels as approximate.
Neighboring Properties
Clicking on a parcel reveals neighboring properties, including their addresses, parcel numbers, and owner names. This makes it easy to study a block, compare lot sizes, or research adjacent owners. Neighboring property data is drawn from the same address database, so the records stay in sync across the map.
Street and Road Information
Street and road information includes the official street name, street type, and any aliases used for the same road. Some streets have changed names over time, and the alias list helps confirm a match when records are outdated. The street layer also shows right-of-way lines, which sit just outside the parcel boundary.
GIS Address Search
The GIS address search combines the address database with the parcel map to deliver results visually. You can type an address, hit enter, and see the parcel highlighted on the map. From there, you can open the property record card, view the legal description, or check the tax account.
Map-Based Address Lookup
Map-based lookup lets you start the search from the map itself by panning and clicking. This method helps when you know the general neighborhood but not the exact address. The map will list the parcel number, situs address, and owner name of any parcel you click.
Address Search by Property Type
The King County Assessor classifies every parcel by use, and each property type carries different tax rules, valuation methods, and record structures. Filtering by property type helps narrow results when you are researching a specific category of real estate.
Residential Addresses
Residential addresses include single-family homes, townhomes, and condominiums classified for residential use. These records typically show building information such as square footage, year built, and number of bedrooms. Residential parcels also receive exemption programs such as the homeowner exemption when eligible.
Commercial Addresses
Commercial addresses cover office space, retail storefronts, restaurants, and service businesses. The assessment values commercial parcels based on income data and market rents in addition to cost-based methods. Commercial property records often list tenant improvements and lease data when reported by the owner.
Agricultural Properties
Agricultural properties include farms, ranches, and timber lands that qualify for the current use program. These parcels receive a reduced taxable value based on the agricultural use rather than the highest and best use. Records typically show acreage, crop type, and any conservation restrictions.
Vacant Land
Vacant land parcels are undeveloped lots without an occupied structure. They may be held for future development, investment, or as part of an estate. Vacant land records list acreage, zoning, and any site improvements such as road access or utility stubs.
Industrial Properties
Industrial properties include warehouses, manufacturing facilities, and distribution centers. The assessor values these parcels based on the industrial use, with separate methods applied to the land and the industrial improvements. Records may show specialized features such as rail spurs, heavy power, or crane capacity.
Multifamily Properties
Multifamily properties include duplexes, triplexes, fourplexes, and apartment buildings. The assessor classifies these parcels as residential but applies a different valuation method that considers income. Records typically list the number of units, total square footage, and any shared amenities.
| Property Type | Typical Records | Valuation Focus |
|---|---|---|
| Residential | Square footage, year built, bedrooms | Market sales comparison |
| Commercial | Tenant improvements, lease data | Income and market approach |
| Agricultural | Acreage, crop type, current use | Use-based valuation |
| Vacant Land | Acreage, zoning, utilities | Market land sales |
| Industrial | Rail access, heavy power, crane capacity | Cost and income approach |
| Multifamily | Number of units, amenities | Income approach |
Address Records and Documents
Beyond the live property record card, the King County Assessor’s Office connects each address to a broader set of recorded documents. These documents include deeds, mortgages, liens, and historical assessments that tell the full story of the property.
Property Record Information
The property record card is the master summary compiled by the assessor. It pulls building information, land information, classification, and assessed values into one view. Appraisers, buyers, and researchers rely on this card as the primary snapshot of the property tied to the address.
Deed References
Deed references show the recording number and date for each deed that transferred ownership of the property. The recording number lets you request a copy of the original deed from the King County Recorder’s Office. The reference also appears on title reports and legal descriptions used in property transfers.
Assessment Records
Assessment records capture the value history of the parcel across multiple tax years. Each annual entry shows the assessed value, taxable value, and classification used in that cycle. Researchers use the value history to track appreciation, exemption effects, and changes in land use over time.
Tax Records
Tax records include the bill, the payment history, and any adjustments made to the parcel. Each annual cycle shows the levy rate, payment due dates, and any delinquency. Tax records also list special assessments such as road improvement districts or flood control zones that affect the total bill.
Historical Property Records
Historical property records extend back through previous decades and include older ownership transfers, plat maps, and legacy parcel numbers. Researchers and genealogists use historical records to trace property lineage and confirm when a parcel was first subdivided. The records are stored digitally and are available through the King County Archives for older entries.
Recorded Property Documents
Recorded property documents include deeds, mortgages, liens, easements, and plats filed with the King County Recorder’s Office. Each document carries a recording number that ties back to the parcel. You can order certified copies of any document through the Recorder’s Office for use in legal transactions.
Address Search Problems
Even with a strong address database, occasional issues prevent a clean search. Most problems fall into a small set of categories that can be addressed with simple adjustments.
Address Not Found
An address not found result usually means the entry does not match a record in the database. Check the spelling, ZIP code, and street type, and try a partial address search if needed. New construction or recently assigned addresses may take time to appear in the address database.
Incorrect Street Address
An incorrect street address can occur when the street name has changed or the user typed a nickname rather than the official name. Try the alias list, switch to a parcel number search, or use the GIS map to confirm the official spelling. Cross-referencing the legal description also resolves street name conflicts.
Missing Address Information
Missing address information happens when a field is blank on the record card. Older parcels and vacant land sometimes lack a situs address, so search by owner name or parcel number instead. The mailing address or legal description can also confirm the correct parcel.
Recently Assigned Addresses
Recently assigned addresses may not appear in the address database immediately after assignment. New construction permits trigger the assignment of an address, and the assessor updates the parcel record on a cycle. If the address is missing, search by parcel number, subdivision, or plat.
Address Changes
Address changes occur when a street is renamed, a ZIP code is updated, or a city annexes new land. The address database tracks prior names so you can search the historical address and pull the current record. The parcel number remains stable through these changes, which makes it the most reliable identifier.
Property With Multiple Addresses
A property with multiple addresses can appear when a single parcel contains more than one structure, such as a duplex or an accessory dwelling unit. Each address will resolve to the same parcel number and account number. Review the building information section to confirm how many units are on the parcel.
Outdated Address Records
Outdated address records can lag behind real-world conditions, especially after major subdivisions or annexations. Running a parcel search or map-based address lookup confirms the current state of the record. The assessor updates records as part of the regular maintenance cycle and through permit-driven updates.
Address lookup starts with a street address and returns the parcel tied to that address. A property search is broader and may start with a parcel number, owner name, or map selection. Use address lookup when you already have a street, and property search when you want to browse parcels without a specific address.
Contact Information
If you need help with an address lookup, parcel search, or property record question, the King County Assessor’s Office is available during business hours. The office is staffed Monday through Friday from 8:30 AM to 4:30 PM. You can reach the office in person, by phone, or through the official search portal.
- Location: King County Assessor’s Office, 201 S. Jackson St., Seattle, WA 98104
- Contact Number: (206) 296-7300
- Office Hours: Mon-Fri: 8:30 AM – 4:30 PM
Frequently Asked Questions
Below are quick answers for common queries about using the King County Assessor’s online Address Lookup tool.
How to search a property by address in King County?
Start at the eRealProperty portal. Enter the full street address, ZIP code, or city name in the search box and click Search. The system matches the input to the county’s address database and displays the parcel number, owner name, and basic property details. If the address is incomplete, you can add a wildcard (*) to broaden the query. Results appear on a single page, and you can click a parcel link for a full record that includes tax history, legal description, and map view.
Can I find a parcel number using an address lookup?
Yes. After entering the street address in the search field, the portal returns the associated parcel ID at the top of the result set. The parcel number is a unique identifier used for tax bills and legal documents. You can copy it for further research or to request detailed records from the Assessor’s office. If multiple parcels share the same address, the system lists each with its distinct number for easy comparison.
What information does the address lookup record show?
The address lookup page presents parcel number, current owner name, mailing address, property type, and land use classification. It also includes assessed value, tax year, and payment status. A legal description outlines lot and block numbers, while an interactive map pinpoints the exact location. Links to deed and tax documents let you view historical ownership and assessment changes without leaving the portal.
Why might an address not appear in the search results?
An address can be missing if it is newly constructed, recently reassigned, or recorded under a different street name. Data entry errors, such as misspelled street names or incorrect ZIP codes, also prevent matches. In some cases, the property may be exempt from public records, limiting its visibility. Verify the spelling, try a partial address with a wildcard, or contact the Assessor’s office at (206) 296‑7300 for assistance.
How to verify a property description by address?
Enter the address in the eReal Property search box and open the parcel record. The legal description appears under the “Property Details” section, showing lot, block, and subdivision information. Compare this text with any deed or title document you have. If the description differs, call the Assessor’s office to confirm the official record or request a corrected description. The portal also offers a printable PDF of the description for your records.