King County property record for 603 18th Ave S, Seattle, WA 98144
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2.5 ba · 2,200 sqft · built 1927 |
| Lot Size | 0.134 acres (5,839 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $10,327 (2026) |
| Deeds & Mortgages | Apr 2017 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 331950-2205 |
| Primary APN | 331950-2205 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 2,200 sqft Living Area |
| 1st Floor Area | 1,390 sqft |
| 2nd Floor Area | 810 sqft |
| Year Built | Built 1927 |
|---|---|
| Effective Year Built | Effective 2018 |
| Architectural Style | Triplex |
| Lot Area | 5,839 sqft (0.134 acres) |
| Garage Type | Attached |
| Garage Area | 920 sqft |
| Porch | Open Porch |
| Porch Area | 810 sqft |
| Deck Area | 300 sqft |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Electric |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 331950220508 |
|---|---|
| Street Address | 603 18TH AVE S |
| City | SEATTLE |
| State | WA |
| Zip | 98144-2108 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LR2 (M) |
| Legal Description | HILL TRACT ADD UNIT LOT A OF SEATTLE SP #3039347-LU REC #20221025900002 SD SP LOC IN LOTS 13-14 BLK 35 OF SD ADD |
| Legal Range | 04 |
| Legal Township | 24 |
| Legal Section | 04 |
| Legal Subdivision | HILL TRACT ADD |
| Legal Block | 35 |
| Legal Lot Number | 13-14 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 1 |
| Census Block | 1022 |
| Census Tract | 9000 |
603 18th Ave S is owned and occupied by two individuals who acquired it in April 2017.
Source: King County records, as of July 7, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 603 18TH AVE S, SEATTLE, WA 98144-2108 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Apr 7, 2017 |
| Transfer Doc | 0000001349 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | KING WA |
| Recording Date | Apr 24, 2017 |
| Property Address | 607 18TH AVE S, SEATTLE, WA 98144-2108 |
| Document Number | 0000001349 |
| Map Reference | VOL8 PG42 |
| Instrument Date | Apr 7, 2017 |
| Instrument | 20170424001349 |
| Transaction Type | Transfer |
| Record Updated | Jul 30, 2021 |
| Title Company | STEWART TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 603 18TH AVE S, SEATTLE, WA 98144-2108 |
| Document Number | 0000001350 |
|---|---|
| Date | Apr 24, 2017 |
| Instrument | 20170424001350 |
| Name | US BANK NA |
|---|---|
| Type | Bank |
| Type | ARM |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | May 1, 2047 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3.87% |
| Adjustable | Adjustable Rate Rider |
| Type Change Date | May 1, 2027 |
| Change Frequency | Annually |
| Min Rate At Change | 2.75% |
| Max Rate At Change | 8.87% |
| Index | 1-Year CMT |
| Max Rate | 8.87% |
The 2026 property tax bill for 603 18th Ave S was $10,327.
Source: King County assessment roll, as of July 7, 2026
| Type | Name |
|---|---|
| State | Washington |
| County | King County |
| Municipality | Seattle City |
| Unified School District | Seattle Public Schools (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $10,327.00 | ||
| 2025 | $959,000 (+1.91%) Land $958,000 Building $1,000 | $959,000 (+1.91%) Land $958,000 Building $1,000 | |
| 2024 | $9,436.00 | $941,000 Land $940,000 Building $1,000 | $941,000 Land $940,000 Building $1,000 |
| 2022 | $10,202.00 | $1,171,800 Land $773,800 Building $398,000 | $1,171,800 Land $773,800 Building $398,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 603 18th Ave S in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2020.
Source: FEMA National Flood Hazard Layer, effective September 23, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 1 (2020) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Dec 2020 · rainfall accumulation |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
The area around 603 18th Ave S has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | SEATTLE PUBLIC UTILITIES serves 1,161,961 people · EPA ID WA5377050 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jul 2025 |
| Lead | 2 ppb (2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 772 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| CenturyLink Fiber | 8,000 / 8,000 |
| Xfinity Cable · Fiber in parts of the area | 2,000 / 2,000 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Verizon Fixed Wireless | 1,000 / 75 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Google Fiber.
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