King County property record for 6770 Mars Ave S, Seattle, WA 98108
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 2,060 sqft · built 1955 |
| Lot Size | 0.147 acres (6,420 sqft) |
| Owner | Individual Name on File |
| Last Sale | $60,000 (Oct 1988) |
| Tax Bill | $7,146 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 000520-0102 |
| Primary APN | 000520-0102 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Stories | 1 Story |
| Building Area | 2,060 sqft Living Area |
| Gross Area | 2,520 sqft |
| 1st Floor Area | 1,260 sqft |
| Basement Area | 960 sqft |
| Finished Basement | 800 sqft |
| Unfinished Basement | 160 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1955 |
| Lot Area | 6,420 sqft (0.147 acres) |
| Garage Type | Attached |
| Garage Area | 300 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 000520010208 |
|---|---|
| Street Address | 6770 MARS AVE S |
| City | SEATTLE |
| State | WA |
| Zip | 98108-3640 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | NR3 |
| Legal Description | MAPLE S A-D C # 49 POR OF D C BEG AT PT ON NELY LN OF MARS AVE 160 FT NWLY OF N LN OF WILLOW ST TH CONTG NWLY 60 FT TH N 50-18-40 E 107.18 FT TH SLY PLW MARS AVE 60 FT TH S 50-18-40 W TO BEG |
| Legal Range | 04 |
| Legal Township | 24 |
| Legal Section | 28 |
| Legal Subdivision | MAPLE S A # 49 |
| Jurisdiction | KING WA |
| Township / Civil Division | SEATTLE |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 11002 |
6770 Mars Ave S is owned and occupied by an individual who bought it in October 1988.
Source: King County records, as of July 7, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 6770 MARS AVE S, SEATTLE, WA 98108-3640 |
| 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 | Name on Deed |
|---|---|
| Last Sale | Oct 17, 1988 · Amount on File |
| Deed Sale | Oct 17, 1988 · Amount on File |
| Deed Document Number | 198810310772 |
| Deed Book / Page | 905 / 26 |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 6770 Mars Ave S was $7,146.
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 | $7,146.00 | ||
| 2025 | $638,000 (+3.57%) Land $417,000 Building $221,000 | $638,000 (+3.57%) Land $417,000 Building $221,000 | |
| 2024 | $6,447.00 | $616,000 Land $417,000 Building $199,000 | $616,000 Land $417,000 Building $199,000 |
| 2022 | $5,722.00 | $620,000 Land $319,000 Building $301,000 | $620,000 Land $319,000 Building $301,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 6770 Mars 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 6770 Mars 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 177 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| CenturyLink Fiber · DSL in parts of the area | 2,000 / 1,000 |
| Astound Broadband Cable | 1,500 / 50 |
| Verizon Fixed Wireless | 1,000 / 75 |
May also be available: T-Mobile, Xfinity.
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