550 S Monroe St, Seattle, WA 98108

Small-Bay Industrial · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: warehouse/flex. AI estimate from public imagery. In recent public imagery (2026-06), the building appears well maintained. AI estimate from public imagery; may be outdated.

One of 1,229 reachable small-bay industrial buildings in Seattle. Larger than 32% of small-bay industrial buildings in Seattle (median 14,469 SF), derived from assessor records.

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Building size
9,280 SF, King County Assessor
Lot size
15,000 SF, King County Assessor
Year built
1967, King County Assessor
Stories
1, King County Assessor
Buildings on parcel
2, King County Assessor
Predominant use
Metal Industrial Bldg, King County Assessor
Assessed value
$1,859,500, per the King County Assessor (not a market appraisal)
Assessed value per building SF
$200.38/SF, derived from assessor records
Lot coverage
62%, derived from assessor records
Vintage
1960s vintage
Zoning
MML U/85, King County
County use code
Industrial(Gen Purpose)
Construction (observed)
metal, AI estimate from public imagery
Parking (observed)
surface lot, AI estimate from public imagery
Frontage (observed)
mid block, AI estimate from public imagery

Nearby comparable buildings

Same building type, by distance. Assessor facts only; not an opinion of value.

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Sale history and market context

MakeMe Estimate: $2,859,828 (estimated market value), with a likely range of $2,008,290 to $3,167,262 (half of recent verified sales in this segment landed inside that range). Based on 86 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2007-01-26 for $1,050,000 (recorded arm's-length sale).

Current ownership dates to 2007 (about 19 years) per recorded transfers.

Source: King County recorded sales extract; buyer and seller shown only when a company or organization. Individual names are withheld.

Value over time

$745K$1.49M$2.24M$2.98M201120142017202020232026County appraised valueEstimated value (modeled range)

Solid line: county appraised value per King County tax rolls. Shaded range: our modeled estimate for each year, built from recorded arm's-length sales in the building's segment; years without enough sales stay unmodeled. Dots: recorded arm's-length sales. Not an appraisal. How this estimate works.

Land, site, and value history

Assessed value moved from $699,600 (2011) to $1,859,500 (2026), up 166% over 15 years, per county tax rolls. The 2026 roll splits $1,859,500 into $862,500 land and $997,000 improvements.

Taxes