121 Lakeside Ave, Seattle, WA 98122

Office · Seattle · Seattle-Bellevue metro, WA

One of 1,701 reachable office buildings in Seattle. Larger than 48% of office buildings in Seattle (median 8,568 SF), derived from assessor records.

Usable building area
8,047 SF, King County Assessor
County gross area
14,005 SF, King County Assessor
Excluded area
5,958 SF outside primary usable area
Lot size
28,806 SF, King County Assessor
Year built
1998, King County Assessor
Stories
1, King County Assessor
Predominant use
Condominium(office), King County Assessor
Assessed value
$2,977,390, per the King County Assessor (not a market appraisal)
Assessed value per usable SF
$370/SF, derived from assessor records
Usable area / lot
0.28, derived from assessor records
Vintage
1990s vintage
Zoning
NC1-55 (M), King County
County use code
Condominium(Office)

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: $3.56M (estimated market value), with a likely range of $3.14M to $4.11M (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: 2 comparable sales within 3 miles; nearest 2.7 mi. This property type carries wider measured error; treat the estimate as a starting point.

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: 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 1.20x county assessed value, the 73rd 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.

Land, site, and value history