10005 SW 178th St, Vashon, WA 98070
Office · Vashon · Seattle-Bellevue metro, WA
One of 25 reachable office buildings in Vashon. Larger than 72% of office buildings in Vashon (median 2,753 SF), derived from assessor records.
- Usable building area
- 5,493 SF, King County Assessor
- Lot size
- 21,300 SF, King County Assessor
- Year built
- 1961, King County Assessor
- Stories
- 1, King County Assessor
- Predominant use
- Post Office, King County Assessor
- Assessed value
- $1,220,400, per the King County Assessor (not a market appraisal)
- Assessed value per usable SF
- $222.17/SF, derived from assessor records
- Usable area / lot
- 0.26, derived from assessor records
- Vintage
- 1960s vintage
- Zoning
- CB, King County
- County use code
- Post Office/Post Service
Nearby comparable buildings
Same building type, by distance. Assessor facts only; not an opinion of value.
- 9922 SW 178th St, Vashon · 0.1 mi · 1,730 SF · built 1971 · assessed $287.34/SF
- 17710 100th Ave SW, Vashon · 0.1 mi · 7,247 SF · built 1974 · assessed $179.62/SF
- 17635 100th Ave SW, Vashon · 0.1 mi · 3,914 SF · built 1979 · assessed $223.43/SF
- 10011 SW Bank Rd, Vashon · 0.1 mi · 2,400 SF · built 1974
- 9929 SW Bank Rd, Vashon · 0.2 mi · 4,283 SF · built 1996 · assessed $276.91/SF
- 10007 SW Bank Rd, Vashon · 0.2 mi · 1,440 SF · built 1924 · assessed $226.32/SF
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Sale history and market context
MakeMe Estimate: $1.63M (estimated market value), with a likely range of $1.44M to $1.88M (half of recent verified sales in this segment landed inside that range). Based on 8 verified arm's-length comparable sales (through 2026-06-01). Not an appraisal. How this estimate works.
lower confidence: 1 comparable sale within 3 miles; nearest 0.4 mi. This property type carries wider measured error; treat the estimate as a starting point.
Comparable sales used as evidence
- 17223 Vashon Hwy SW, Vashon: $450,000 (2025-09), 1,425 SF, $315.79/SF, built 1959, 0.4 mi away
- 15220 6th Ave SW, Burien: $785,000 (2024-12), 3,081 SF, $254.79/SF, built 1955, 5.8 mi away (different city)
- 15324 4th Ave SW, Burien: $600,000 (2025-10), 2,101 SF, $285.58/SF, built 1920, 5.9 mi away (different city)
- 133 SW 158th St, Burien: $1,575,000 (2024-07), 5,208 SF, $302.42/SF, built 1978, 6 mi away (different city)
- 1106 SW 120th St, Burien: $600,000 (2026-04), 1,471 SF, $407.89/SF, built 1995, 6.3 mi away (different city)
Recorded arm's-length sales of similar buildings nearby; nearer and more recent sales rank first. Buyer and seller names are withheld. Get this data via API.
Ownership tenure is not asserted for this parcel: the most recent recorded transfer is a non-market conveyance.
- 2 administrative transfers (no consideration), 1990 to 2005
Source: King County recorded sales extract; buyer and seller shown only when a company or organization. Individual names are withheld.
Land, site, and value history
Assessed value moved from $737,900 (2011) to $1,220,400 (2026), up 65% over 15 years, per county tax rolls. The 2026 roll splits $1,220,400 into $575,100 land and $645,300 improvements.
- Zoning: CB (per King County)
- Lot: 21,300 sq ft
- Water: Water District (per King County)
- Sewer: Public (per King County)
- Access: Public
- Floor and use mix: Post Office - Branch 5,493 SF (county building sections)
- County districts report (schools, fire, sewer, council; on kingcounty.gov)