King County property record for 3427 21st Ave W, Seattle, WA 98199
| Property Type | Quadplex |
|---|---|
| Details | 3,200 sqft · built 1974 |
| Lot Size | 0.138 acres (6,000 sqft) |
| Owner | Individual Name on File |
| Last Sale | $493,500 (Aug 2003) |
| Tax Bill | $11,866 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 277060-1765 |
| Primary APN | 277060-1765 |
|---|---|
| Alternative APN |
|
| Units | 5 Units |
|---|---|
| Stories | 2 Stories |
| Building Area | 3,200 sqft |
| Gross Area | 3,600 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1974 |
|---|---|
| Effective Year Built | Effective 1995 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 6,000 sqft (0.138 acres) |
| Garage Type | Covered |
| Heating System | Floor/Wall Furnace |
|---|---|
| Heating Fuel | Electric |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 277060176504 |
|---|---|
| Street Address | 3427 21ST AVE W |
| City | SEATTLE |
| State | WA |
| Zip | 98199-2304 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Local Zoning Code | LR1 (M) |
| Legal Description | GILMANS ADD PLAT BLOCK: 13 PLAT LOT: 18 |
| Legal Subdivision | GILMANS ADD BLKS 01 THRU 87 |
| Legal Block | 13 |
| Legal Lot Number | 18 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 5801 |
3427 21st Ave W, a quadplex, is owned by an individual who bought it in August 2003.
Source: King County records, as of July 7, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 3429 21ST AVE W, B, SEATTLE, WA 98199-2304 |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 26, 2003 · Amount on File |
| Deed Sale | Aug 26, 2003 · Amount on File |
| Prior Sale | Dec 29, 1997 · Amount on File |
| Deed Document Number | 20031766 |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 3427 21st Ave W was $11,866, up 10.3% from the year before.
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 | $11,866.00 (+10.34%) | ||
| 2025 | $10,754.00 | $1,103,000 (+2.41%) Land $918,000 Building $185,000 | $1,103,000 (+2.41%) Land $918,000 Building $185,000 |
| 2024 | $10,754.00 | $1,077,000 Land $900,000 Building $177,000 | $1,077,000 Land $900,000 Building $177,000 |
| 2022 | $10,380.00 | $1,188,000 Land $810,000 Building $378,000 | $1,188,000 Land $810,000 Building $378,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3427 21st Ave W in Zone X, an area of minimal flood risk, though there have been 3 flood claims nearby since 2012.
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 | 3 in force |
| Nearby Flood Claims | 3 (2012–2024) |
| Claims Outside the SFHA | 3 of 3 |
| Most Recent Claim | Oct 2024 · other causes |
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 3427 21st Ave W 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 860 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| CenturyLink Fiber | 8,000 / 8,000 |
| Xfinity Cable | 2,000 / 2,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband.
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