King County property record for 101 Prospect St, Seattle, WA 98109
| Property Type | Single Family Home |
|---|---|
| Details | 6 bd · 4.5 ba · 5,660 sqft · built 1920 |
| Lot Size | 0.353 acres (15,360 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $2,330,000 (Jun 2016) |
| Tax Bill | $29,795 (2026) |
| Deeds & Mortgages | Jul 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 545730-0195 |
| Primary APN | 545730-0195 |
|---|---|
| Alternative APN |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 5,660 sqft Living Area |
| 1st Floor Area | 1,880 sqft |
| 2nd Floor Area | 1,500 sqft |
| Upper Floors Area | 400 sqft |
| Basement Area | 1,880 sqft |
| Finished Basement | 1,880 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Elevator | Elevator |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 1920 |
| Lot Area | 15,360 sqft (0.353 acres) |
| View / Lot | Water View |
| Garage Type | Detached |
| Garage Area | 440 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 110 sqft |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 545730019506 |
|---|---|
| Street Address | 101 PROSPECT ST |
| City | SEATTLE |
| State | WA |
| Zip | 98109-3658 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | NR3 |
| Legal Description | MERCERS ADD TO N SEATTLE |
| Legal Range | 04 |
| Legal Township | 25 |
| Legal Section | 30 |
| Legal Subdivision | MERCERS ADD TO N SEATTLE |
| Legal Block | 8 |
| Legal Lot Number | 5-6 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 7002 |
101 Prospect St is owned and occupied by two individuals who bought it in June 2016.
Source: King County records, as of July 13, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 101 PROSPECT ST, SEATTLE, WA 98109-3658 |
| 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 | Jun 8, 2016 · Amount on File |
| Deed Sale | Jun 8, 2016 · Amount on File |
| Prior Sale | May 14, 2001 · Amount on File |
| Deed Document Number | 20161063 |
| Prior Transfer Date | Dec 20, 1996 |
| Prior Transfer Doc | 0000001396 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | KING WA |
| Property Address | 101 PROSPECT ST, SEATTLE, WA 98109-3658 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | TICOR TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000001283 |
|---|---|
| Date | Jul 31, 2020 |
| Instrument | 20200731001283 |
| Name | WASHINGTON TRUST BANK |
|---|---|
| Type | Bank |
| Address | SPOKANE, WA 99201 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Aug 1, 2050 |
The 2026 property tax bill for 101 Prospect St was $29,795, up 9.7% 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 | $29,795.00 (+9.67%) | ||
| 2025 | $27,167.00 (-48.4%) | $2,895,000 (+1.79%) Land $2,106,000 Building $789,000 | $2,895,000 (+1.79%) Land $2,106,000 Building $789,000 |
| 2024 | $52,653.00 | $2,844,000 Land $2,106,000 Building $738,000 | $2,844,000 Land $2,106,000 Building $738,000 |
| 2022 | $75,731.00 | $2,879,000 Land $2,229,000 Building $650,000 | $2,879,000 Land $2,229,000 Building $650,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 101 Prospect St 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 101 Prospect St 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 631 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 | 1,000 / 75 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, Google Fiber, T-Mobile.
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