King County property record for 400 18th Ave E, Seattle, WA 98112 · Last verified July 2026
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2.25 ba · 4,360 sqft · built 1907 |
| Lot Size | 0.124 acres (5,400 sqft) |
| Owner | Company Name on File |
| Last Sale | $685,000 (Jun 2010) |
| Tax Bill | $19,227 (2026) |
| Deeds & Mortgages | Nov 2025 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 423240-1095 |
| Primary APN | 423240-1095 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 2 Half Baths |
| Stories | 2 Stories |
| Building Area | 4,360 sqft Living Area |
| Gross Area | 5,190 sqft |
| 1st Floor Area | 1,650 sqft |
| 2nd Floor Area | 1,890 sqft |
| Upper Floors Area | 820 sqft |
| Basement Area | 830 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1907 |
|---|---|
| Effective Year Built | Effective 1907 |
| Architectural Style | Duplex Single |
| Lot Area | 5,400 sqft (0.124 acres) |
| Porch | Open Porch |
| Porch Area | 480 sqft |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Electric |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 423240109508 |
|---|---|
| Street Address | 400 18TH AVE E |
| City | SEATTLE |
| State | WA |
| Zip | 98112-4612 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | LAWS ADD W 1/2 |
| Legal Range | 04 |
| Legal Township | 25 |
| Legal Section | 28 |
| Legal Subdivision | LAWS ADD |
| Legal Block | 20 |
| Legal Lot Number | 7-8 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 7600 |
Source: King County records · APN 423240-1095
Assessment roll updated July 7, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 400 18TH AVE E, SEATTLE, WA 98112-4612 |
| Owner Type | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Jun 10, 2010 · Amount on Record |
| Deed Sale | Jun 10, 2010 · Amount on Record |
| Prior Sale | Jun 15, 1983 · Amount on Record |
| Deed Document Number | 2010148 |
| Last Transfer Date | Nov 20, 2025 |
| Transfer Doc | 0000000428 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | KING WA |
| Recording Date | Nov 21, 2025 |
| Property Address | 400 18TH AVE E, SEATTLE, WA 98112-4612 |
| Document Number | 0000000428 |
| Map Reference | VOL 1 PG 51 |
| Instrument Date | Nov 20, 2025 |
| Instrument | 20251121000428 |
| Transaction Type | Transfer |
| Record Updated | Dec 25, 2025 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 400 18TH AVE E, SEATTLE, WA 98112-4612 |
Source: King County records · Assessment roll updated July 7, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | Washington |
| County | King County |
| Municipality | Seattle City |
| Unified School District | Seattle Public Schools (PK - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $19,227.00 (+5.76%) | ||
| 2025 | $1,867,000 (-1.84%) Land $1,566,000 Building $301,000 | $1,867,000 (-1.84%) Land $1,566,000 Building $301,000 | |
| 2024 | $18,179.00 (+30.28%) | $1,902,000 (+16.4%) Land $1,566,000 Building $336,000 | $1,902,000 (+16.4%) Land $1,566,000 Building $336,000 |
| 2022 | $13,954.00 | $1,634,000 Land $592,000 Building $1,042,000 | $1,634,000 Land $592,000 Building $1,042,000 |
Source: FEMA National Flood Hazard Layer, King County (53033C), updated September 23, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 878 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 2,000 |
| Radiate Holdings | Cable | 1,500 / 50 |
| Verizon | Fixed Wireless | 1,000 / 75 |
| AT&T | Fixed Wireless | 100 / 20 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
May also be available at this address: Lumen Technologies, Radiate Holdings, Google Fiber, Xfinity. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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