9921 W Riverside Dr, Bothell, WA 98011

Commercial · Bothell · Seattle-Bellevue metro, WA

One of 75 reachable commercial buildings in Bothell. Larger than 97% of commercial buildings in Bothell (median 7,281 SF), derived from assessor records.

Usable building area
184,968 SF, King County Assessor
County gross area
203,189 SF, King County Assessor
Excluded area
18,221 SF outside primary usable area
Lot size
237,932 SF, King County Assessor
Year built
2015, King County Assessor
Stories
4, King County Assessor
Buildings on parcel
3, King County Assessor
Predominant use
Retirement Facility, King County Assessor
Units
148, King County Assessor
Assessed value
$44,503,100, per the King County Assessor (not a market appraisal)
Assessed value per usable SF
$240.60/SF, derived from assessor records
Usable area / lot
0.78, derived from assessor records
Vintage
2010s vintage
Zoning
R 9600, SSHO, King County
County use code
Retirement Facility

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: $49.4M (estimated market value), with a likely range of $41M to $59.5M (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: 1 comparable sale within 3 miles; nearest 0.2 mi. This property type carries wider measured error; treat the estimate as a starting point. Comparable-sale caveat: the estimate is 58% above the $169.41/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: Commercial in Bothell

2 sales in the last 12 months and 2 in 24 (newest verified sale 2024-11).

Thin market: under 5 verified sales in the last 24 months; treat these aggregates as directional.

Computed from 55 verified arm's-length sales in King County public records (2 in the trailing 24 months). Free public records. Not an appraisal.

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$49.4M$44.5MCounty 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 $9,516,300 (2011) to $44,503,100 (2026), up 368% over 15 years, per county tax rolls. The 2026 roll splits $44,503,100 into $4,163,800 land and $40,339,300 improvements.

Taxes