King County property record for 3400 20th Ave S, Seattle, WA 98144
| Property Type | Duplex |
|---|---|
| Details | 3 bd · 3.5 ba · 2,430 sqft · built 1949 |
| Lot Size | 0.073 acres (3,173 sqft) |
| Owner | Individual Name on File |
| Last Sale | $344,000 (Mar 2005) |
| Tax Bill | $10,647 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 162404-9119 |
| Primary APN | 162404-9119 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 2 Half Baths |
| Stories | 2 Stories |
| Building Area | 2,430 sqft Living Area |
| 1st Floor Area | 1,250 sqft |
| 2nd Floor Area | 310 sqft |
| Basement Area | 870 sqft |
| Finished Basement | 870 sqft |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1949 |
| Architectural Style | Duplex Single |
| Exterior Material | Brick |
| Lot Area | 3,173 sqft (0.073 acres) |
| Garage Area | 240 sqft |
| Deck Area | 110 sqft |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 162404911909 |
|---|---|
| Street Address | 3400 20TH AVE S |
| City | SEATTLE |
| State | WA |
| Zip | 98144-6708 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | NR3 |
| Legal Description | W 81.105 FT OF E 162.21 FT OF N 40 FT OF TR 20 STATE PLAT SEC 16-24-4 |
| Legal Range | 04 |
| Legal Township | 24 |
| Legal Section | 16 |
| Legal Subdivision | C D HILLMAN S PACIFIC CITY DIVISION #3 |
| Legal Tract | 20 |
| Legal Block | 119 |
| Legal Lot Number | 20 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 1 |
| Census Block | 1019 |
| Census Tract | 10002 |
3400 20th Ave S, a duplex, is owned by an individual who acquired it in October 2013.
Source: King County records, as of July 7, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 24252 SE 1ST PL, SAMMAMISH, WA 98074-3473 |
| 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 | Name on Deed |
|---|---|
| Last Sale | Mar 31, 2005 · Amount on File |
| Deed Sale | Mar 31, 2005 · Amount on File |
| Prior Sale | May 28, 2004 · Amount on File |
| Deed Document Number | 20053730 |
| Last Transfer Date | Oct 10, 2013 |
| Transfer Doc | 0000000497 |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 3400 20th Ave S was $10,647.
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 | $10,647.00 | ||
| 2025 | $1,025,000 (+3.54%) Land $277,000 Building $748,000 | $1,025,000 (+3.54%) Land $277,000 Building $748,000 | |
| 2024 | $9,568.00 | $990,000 Land $277,000 Building $713,000 | $990,000 Land $277,000 Building $713,000 |
| 2022 | $8,086.00 | $933,000 Land $212,000 Building $721,000 | $933,000 Land $212,000 Building $721,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3400 20th Ave S in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 23, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 3400 20th 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 620 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| CenturyLink Fiber | 2,000 / 1,000 |
| Astound Broadband Cable | 1,500 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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