700 S 320th St, Federal Way, WA 98003

Office · Federal Way · Seattle-Bellevue metro, WA

Imagery suggests: office, appears multi-tenant. AI estimate from public imagery. In recent public imagery (2026-06), the building appears well maintained. AI estimate from public imagery; may be outdated.

One of 171 reachable office buildings in Federal Way. Larger than 41% of office buildings in Federal Way (median 9,872 SF), derived from assessor records.

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Building size: 8,064 SF, King County Assessor
Lot size: 28,100 SF, King County Assessor
Year built: 1985, King County Assessor
Stories: 1, King County Assessor
Predominant use: Medical Offices, King County Assessor
Assessed value: $2,507,200, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $310.91/SF, derived from assessor records
Lot coverage: 29%, derived from assessor records
Vintage: 1980s vintage
Zoning: PO, King County
County use code: Medical/Dental Office
Construction (observed): wood frame, AI estimate from public imagery
Parking (observed): surface lot, AI estimate from public imagery
Frontage (observed): mid block, AI estimate from public imagery

Nearby comparable buildings

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

622 S 320th St, Federal Way · 0 mi · 11,600 SF · built 1986 · assessed $272.88/SF
728 S 320th St, Federal Way · 0 mi · 9,780 SF · built 1983 · assessed $310.91/SF
720 S 320th St, Federal Way · 0 mi · 8,960 SF · built 1983 · assessed $310.90/SF
31919 6th Ave S, Federal Way · 0.1 mi · 11,144 SF · built 1972 · assessed $161.40/SF
1025 S 320th St, Federal Way · 0.3 mi · 8,608 SF · built 1977 · assessed $172.25/SF
1014 S 320th St, Federal Way · 0.3 mi · 9,680 SF · built 1969 · assessed $271.89/SF

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Sale history and market context

MakeMe Estimate: $2,781,565 (estimated market value), with a likely range of $2,513,846 to $3,624,248 (half of recent verified sales in this segment landed inside that range). Based on 55 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Current ownership dates to 2017 (about 9 years) per recorded transfers.

2017-07-11: $8,438,000 from Capitol Square LLC to 622 Federal Way Investments LLC+NC Real Estate LLC… (part of a 5-parcel sale; price is the whole deal), rec.

1997-12-30: transfer from Private party to Capitol Square LLC (part of a 5-parcel sale; price is the whole deal), rec. 199712312017

1996-04-04: $4,740,000 from Private party to Private party (part of a 5-parcel sale; price is the whole deal), rec. 199604050328

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

Value over time

Solid line: county appraised value per King County tax rolls. Shaded range: our modeled estimate for each year, built from recorded arm's-length sales in the building's segment; years without enough sales stay unmodeled. Dots: recorded arm's-length sales. Not an appraisal. How this estimate works.

Land, site, and value history

Assessed value moved from $1,596,700 (2011) to $2,507,200 (2026), up 57% over 15 years, per county tax rolls. The 2026 roll splits $2,507,200 into $281,000 land and $2,226,200 improvements.

Zoning: PO (per King County)

Lot: 28,100 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Medical Office 8,064 SF (county building sections)

County districts report (schools, fire, sewer, council; on kingcounty.gov)