King County property record for 817 20th Ave S, Seattle, WA 98144
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.75 ba · 2,270 sqft · built 1904 |
| Lot Size | 0.069 acres (3,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $110,000 (Nov 1992) |
| Tax Bill | $9,200 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 712830-0070 |
| Primary APN | 712830-0070 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.75 Baths |
| Half Baths | 1 Half Bath |
| Stories | 1 Story |
| Building Area | 2,270 sqft Living Area |
| 1st Floor Area | 1,150 sqft |
| Upper Floors Area | 1,120 sqft |
| Basement Area | 220 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1904 |
|---|---|
| Effective Year Built | Effective 1904 |
| Lot Area | 3,000 sqft (0.069 acres) |
| Porch | Open Porch |
| Porch Area | 50 sqft |
| Deck Area | 220 sqft |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Electric |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 712830007001 |
|---|---|
| Street Address | 817 20TH AVE S |
| City | SEATTLE |
| State | WA |
| Zip | 98144-2919 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RSL (M) |
| Legal Description | RAINIER ADD TO SEATTLE PLAT BLOCK: 1 PLAT LOT: 13 |
| Legal Range | 04 |
| Legal Township | 24 |
| Legal Section | 04 |
| Legal Subdivision | RAINIER ADD TO SEATTLE |
| Legal Block | 1 |
| Legal Lot Number | 13 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 4 |
| Census Block | 4000 |
| Census Tract | 9400 |
817 20th Ave S is owned and occupied by two individuals who acquired it in February 2016.
Source: King County records, as of July 7, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 817 20TH AVE S, SEATTLE, WA 98144-2919 |
| 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 Sale | Nov 18, 1992 · Amount on File |
| Deed Sale | Nov 18, 1992 · Amount on File |
| Deed Document Number | 199211252281 |
| Deed Book / Page | 5 / 57 |
| Last Transfer Date | Feb 4, 2016 |
| Transfer Doc | 0000000844 |
| Record Updated | Sep 20, 2026 |
The 2026 property tax bill for 817 20th Ave S was $9,200, up 16.5% 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 | $9,200.00 (+16.53%) | ||
| 2025 | $7,895.00 | $879,000 (+8.79%) Land $347,000 Building $532,000 | $879,000 (+8.79%) Land $347,000 Building $532,000 |
| 2024 | $7,895.00 | $808,000 Land $341,000 Building $467,000 | $808,000 Land $341,000 Building $467,000 |
| 2022 | $7,242.00 | $829,000 Land $294,000 Building $535,000 | $829,000 Land $294,000 Building $535,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 817 20th Ave S in Zone X, an area of minimal flood risk.
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 |
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 817 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 655 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 |
May also be available: Google Fiber, T-Mobile.
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