618 S 223rd St, Des Moines, WA 98198

Office · Des Moines · Seattle-Bellevue metro, WA

One of 45 reachable office buildings in Des Moines. Larger than 38% of office buildings in Des Moines (median 4,448 SF), derived from assessor records.

Usable building area
3,870 SF, King County Assessor
County gross area
4,194 SF, King County Assessor
Excluded area
324 SF outside primary usable area
Lot size
6,000 SF, King County Assessor
Year built
1969, King County Assessor
Stories
2, King County Assessor
Predominant use
Office Building, King County Assessor
Assessed value
$870,700, per the King County Assessor (not a market appraisal)
Assessed value per usable SF
$224.99/SF, derived from assessor records
Usable area / lot
0.65, derived from assessor records
Vintage
1960s vintage
Zoning
D-C, King County
County use code
Office Building

Nearby comparable buildings

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

Want to talk to the owner? makeme1031 delivers a private letter directly to the owner of record. We never publish the owner's identity or address.

Own this building?

Claim privately

Claiming is for you. Your mailing address is never shown; no offer reaches you unless you opt in.

Claimed owners can confirm facts, watch the estimate, and decide whether to reply.

Received a letter about this building? It came from a real buyer through makeme1031; claiming is how you reply privately, on your terms.

Claimed owners also get Portfolio Pulse: a monthly email tracking this building's value.

Claim or manage this building

Sale history and market context

MakeMe Estimate: $1.17M (estimated market value), with a likely range of $1.03M to $1.34M (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 0.2 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.

Last sold: 1997-05-19 for $290,000 (recorded arm's-length sale).

Ownership tenure is not asserted for this parcel: the most recent recorded transfer is a non-market conveyance.

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

Value over time

$0$500K$1M$1.5M201120142017202020232026$1.17M$871KCounty 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. Diamonds: recorded arm's-length sales. Not an appraisal. How this estimate works.

Land, site, and value history

Assessed value moved from $342,700 (2011) to $870,700 (2026), up 154% over 15 years, per county tax rolls. The 2026 roll splits $870,700 into $138,000 land and $732,700 improvements.

Taxes