MakeMe Estimate: $16M (estimated market value), with a likely range of $14.1M to $18.5M (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: 8 comparable sales within 3 miles; nearest 0.9 mi. This property type carries wider measured error; treat the estimate as a starting point. Last arm's-length sale: $19,679,461 in 2022. The market has moved since; the estimate reflects current county values and ratios, not that price. Comparable-sale caveat: the estimate is 84% above the $299.81/SF median of the shown comparable sales.
Recorded arm's-length sales of similar buildings nearby; nearer and more recent sales rank first. The strongest 5 of 8 nearby verified sales are shown. Buyer and seller names are withheld. Get this data via API.
Market context: Office in Seattle
median verified sale $364.58/SF over the trailing 24 months; 28 sales in the last 12 months and 52 in 24 (newest verified sale 2026-05); the middle 80% of recent sales traded at 0.63x to 1.44x their county assessed value, median 1.00x (52 sales with usable county values).
2022: $472.22/SF median (35 sales)
2023: $415.77/SF median (20 sales)
2024: $326.92/SF median (24 sales)
2025: $371.06/SF median (27 sales)
2026 YTD: $390.03/SF median (11 sales)
This estimate sits at 0.98x county assessed value, the 42nd percentile of those recent sale premiums.
Computed from 1,574 verified arm's-length sales in King County public records (52 in the trailing 24 months). Free public records. Not an appraisal.
Last sold: 2022-12-21 for $19,679,461 (recorded arm's-length sale).
Current ownership dates to 2022 (about 4 years) per recorded transfers.
2022-12-21: $19,679,461 from 1801 LLC to Fairview Harbor LLC, rec. 20221229000122
2012-08-21: $7,520,000 from Bal Den Associates to US Homeport LLC, rec. 20120821001198
2012-08-21: $42,850 from US Homeport LLC to Lake Union Investment LLC, rec. 20120821001202
3 administrative transfers (no consideration), 1987 to 2004
Source: King County recorded sales extract; buyer and seller shown only when a company or organization. Individual names are withheld.
Value over time
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. Diamonds: recorded arm's-length sales. Not an appraisal. How this estimate works.
Land, site, and value history
Assessed value moved from $8,629,700 (2011) to $16,382,000 (2026), up 90% over 15 years, per county tax rolls. The 2026 roll splits $16,382,000 into $14,735,900 land and $1,646,100 improvements.
Zoning: MML U/45 (per King County)
Lot: 290,529 sq ft
Water: Water District (per King County)
Sewer: Public (per King County)
Access: Public
Street surface: Paved
Floor and use mix: Office Building 23,100 SF; Storage Warehouse 6,000 SF (county building sections)