King County property record for 310 Boylston Ave E, Seattle, WA 98102
| Property Type | Quadplex |
|---|---|
| Details | 3,092 sqft · built 1951 |
| Lot Size | 0.164 acres (7,146 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $725,000 (Mar 2005) |
| Tax Bill | $29,955 (2026) |
| Deeds & Mortgages | Sep 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 685070-0420 |
| Primary APN | 685070-0420 |
|---|---|
| Alternative APN |
|
| Units | 5 Units |
|---|---|
| Stories | 1 Story |
| Building Area | 3,092 sqft Adjusted Area |
| Gross Area | 3,402 sqft |
| Year Built | Built 1951 |
|---|---|
| Effective Year Built | Effective 1991 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 7,146 sqft (0.164 acres) |
| Garage Type | Covered |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 685070042005 |
|---|---|
| Street Address | 310 BOYLSTON AVE E |
| City | SEATTLE |
| State | WA |
| Zip | 98102-5306 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Local Zoning Code | MR (M) |
| Legal Description | PONTIUS A SUPL 4 & S 5 FT OF 5 |
| Legal Range | 04 |
| Legal Township | 25 |
| Legal Section | 29 |
| Legal Subdivision | PONTIUS A SUPL |
| Legal Block | 37 |
| Legal Lot Number | 4-5 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 7403 |
Source: King County records, as of July 7, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 11704 114TH AVE NE, KIRKLAND, WA 98034-7011 |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 21, 2005 · Amount on Record |
| Deed Sale | Mar 21, 2005 · Amount on Record |
| Prior Sale | Feb 25, 1993 |
| Deed Document Number | 2005909 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | KING WA |
| Property Address | 310 BOYLSTON AVE E, SEATTLE, WA 98102-5306 |
| Transaction Type | Mortgage |
| Record Updated | Oct 4, 2021 |
| Title Company | SERVICELINK |
| Name | Verified Name |
|---|
| Document Number | 0000000153 |
|---|---|
| Date | Sep 23, 2021 |
| Instrument | 20210923000153 |
| Name | KEY BANK NA |
|---|---|
| Type | Bank |
| Address | CLEVELAND, OH 44114 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 181 Months |
| Due | Oct 1, 2036 |
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 | $29,955.00 (+9.73%) | ||
| 2025 | $2,911,000 (+1.8%) Land $2,858,000 Building $53,000 | $2,911,000 (+1.8%) Land $2,858,000 Building $53,000 | |
| 2024 | $27,300.00 (+22.16%) | $2,859,400 (+8.11%) Land $2,858,400 Building $1,000 | $2,859,400 (+8.11%) Land $2,858,400 Building $1,000 |
| 2022 | $22,347.00 | $2,645,000 Land $2,644,000 Building $1,000 | $2,645,000 Land $2,644,000 Building $1,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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.
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 332 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable · Fiber in parts of the area | 2,000 / 2,000 |
| Astound Broadband Fiber · Cable | 2,000 / 2,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: CenturyLink, Google Fiber, T-Mobile.
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