King County property record for 10239 40th Ave SW, Seattle, WA 98146
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,430 sqft · built 1937 |
| Lot Size | 0.305 acres (13,300 sqft) |
| Owner | Individual Name on File |
| Last Sale | $840,000 (Apr 2025) |
| Tax Bill | $9,179 (2026) |
| Deeds & Mortgages | Aug 2020 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 289560-0290 |
| Primary APN | 289560-0290 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Stories | 1 Story |
| Building Area | 1,430 sqft Living Area |
| Gross Area | 1,770 sqft |
| 1st Floor Area | 1,430 sqft |
| Basement Area | 340 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1937 |
|---|---|
| Effective Year Built | Effective 1937 |
| Lot Area | 13,300 sqft (0.305 acres) |
| Garage Type | Detached |
| Garage Area | 580 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Heat Pump |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 289560029000 |
|---|---|
| Street Address | 10239 40TH AVE SW |
| City | SEATTLE |
| State | WA |
| Zip | 98146-1129 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | NR3 |
| Legal Description | GREENACRES ADD N 1/2 OF 23 & ALL 24-25 |
| Legal Range | 03 |
| Legal Township | 23 |
| Legal Section | 02 |
| Legal Subdivision | GREENACRES ADD |
| Legal Block | 2 |
| Legal Lot Number | 23 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 2 |
| Census Block | 2010 |
| Census Tract | 12000 |
10239 40th Ave SW is owned and occupied by an individual who bought it in April 2025.
Source: King County records, as of July 7, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 10239 40TH AVE SW, SEATTLE, WA 98146-1129 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Unmarried |
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 | Apr 2, 2025 · Amount on File |
| Deed Sale | Apr 2, 2025 · Amount on File |
| Deed Document Number | 2025318 |
| Prior Transfer Date | Jul 20, 2020 |
| Prior Transfer Doc | 0000000550 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | KING WA |
| Recording Date | Aug 7, 2020 |
| Property Address | 10239 40TH AVE SW, SEATTLE, WA 98146-1129 |
| Document Number | 0000000550 |
| Instrument Date | Jul 20, 2020 |
| Instrument | 202008070550 |
| Transaction Type | Transfer |
| Record Updated | Aug 19, 2020 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 10239 40TH AVE SW SEATTLE WA 981461129, SEATTLE, WA 98146-1129 |
The 2026 property tax bill for 10239 40th Ave SW was $9,179, up 11.8% 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 | $9,179.00 (+11.83%) | ||
| 2025 | $8,208.00 | $794,000 (+5.31%) Land $793,000 Building $1,000 | $794,000 (+5.31%) Land $793,000 Building $1,000 |
| 2024 | $8,208.00 | $754,000 Land $753,000 Building $1,000 | $754,000 Land $753,000 Building $1,000 |
| 2022 | $7,099.00 | $734,000 Land $318,000 Building $416,000 | $734,000 Land $318,000 Building $416,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 10239 40th Ave SW in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2010.
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 | 2 in force |
| Nearby Flood Claims | 1 (2010) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Dec 2010 · 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 10239 40th Ave SW 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 664 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| CenturyLink Fiber | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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