400 Costco Dr, Tukwila, WA 98188

Retail · Tukwila · Seattle-Bellevue metro, WA

One of 145 reachable retail buildings in Tukwila. Larger than 97% of retail buildings in Tukwila (median 7,405 SF), derived from assessor records.

Usable building area
209,172 SF, King County Assessor
County gross area
222,444 SF, King County Assessor
Excluded area
13,272 SF outside primary usable area
Lot size
741,776 SF, King County Assessor
Year built
1970, King County Assessor
Stories
1, King County Assessor
Predominant use
Retail(discount), King County Assessor
Assessed value
$40,712,800, per the King County Assessor (not a market appraisal)
Assessed value per usable SF
$194.64/SF, derived from assessor records
Usable area / lot
0.28, derived from assessor records
Vintage
1970s vintage
Zoning
TUC-WP, King County
County use code
Retail(Discount)

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: $41.7M (estimated market value), with a likely range of $32.4M to $50.1M (half of recent verified sales in this segment landed inside that range). Based on 4 verified arm's-length comparable sales (through 2026-06-01). Not an appraisal. How this estimate works.

lower confidence: 0 comparable sales within 3 miles; nearest 5.7 mi. This property type carries wider measured error; treat the estimate as a starting point. Comparable-sale caveat: the estimate is 94% above the $102.91/SF median of the shown comparable sales.

Comparable sales used as evidence

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.

Market context: Retail in Tukwila

median verified sale $333.33/SF over the trailing 24 months; 2 sales in the last 12 months and 5 in 24 (newest verified sale 2026-02).

Computed from 130 verified arm's-length sales in King County public records (5 in the trailing 24 months). Free public records. Not an appraisal.

Current ownership dates to 2011 (about 15 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

$0$20M$40M$60M$80M201120142017202020232026$41.7M$40.7MCounty assessed valueMakeMe Estimate range

Dark line: county assessed value per King County tax rolls. Blue line: our estimate; dashed years are a modeled backcast built from recorded arm's-length sales in the building's segment, not estimates published at the time, and years without enough sales stay unmodeled. The shaded range is the model's measured error band; about half of verified sales in the segment land inside it. Not an appraisal. How this estimate works.

Land, site, and value history

Assessed value moved from $14,772,400 (2011) to $40,712,800 (2026), up 176% over 15 years, per county tax rolls. The 2026 roll splits $40,712,800 into $35,234,300 land and $5,478,500 improvements.

Taxes

Permit history

Source: King County permit records (newest first).