20844 31st Ln S, Seatac, WA 98198
Multifamily · Seatac · Seattle-Bellevue metro, WA
One of 79 reachable multifamily buildings in Seatac. Larger than 9% of multifamily buildings in Seatac (median 20,118 SF), derived from assessor records.
- Usable building area
- 3,680 SF, King County Assessor
- Lot size
- 5,185 SF, King County Assessor
- Year built
- 1986, King County Assessor
- Stories
- 2, King County Assessor
- Predominant use
- 4-Plex, King County Assessor
- Units
- 4, King County Assessor
- Assessed value
- $844,000, per the King County Assessor (not a market appraisal)
- Assessed value per usable SF
- $229.35/SF, derived from assessor records
- Usable area / lot
- 0.71, derived from assessor records
- Vintage
- 1980s vintage
- Zoning
- URM, King County
- County use code
- 4-Plex
Nearby comparable buildings
Same building type, by distance. Assessor facts only; not an opinion of value.
- 20825 31st Ln S, Seatac · 0 mi · 3,680 SF · built 1986 · assessed $229.35/SF
- 20824 31st Ln S, Seatac · 0 mi · 3,680 SF · built 1986 · assessed $229.35/SF
- 20835 31st Ln S, Seatac · 0 mi · 3,680 SF · built 1986 · assessed $229.35/SF
- 20832 31st Ln S, Seatac · 0 mi · 3,680 SF · built 1986 · assessed $229.35/SF
- 20810 31st Ln S, Seatac · 0.1 mi · 3,680 SF · built 1986 · assessed $229.35/SF
- 3201 S 208th St, Seatac · 0.1 mi · 10,860 SF · built 1979 · assessed $226.52/SF
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Sale history and market context
MakeMe Estimate: $983K (estimated market value), with a likely range of $875K to $1.12M (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. About $246K per unit at the midpoint (4 units).
lower confidence: 2 comparable sales within 3 miles; nearest 1.1 mi.
Comparable sales used as evidence
- 22707 30th Ave S, Des Moines: $1,089,400 (2025-11), 4,680 SF, $181,567/door, $232.78/SF, built 1962, 1.1 mi away (different city)
- 22805 30th Ave S, Des Moines: $1,685,000 (2025-06), 7,443 SF, $153,182/door, $226.39/SF, built 1968, 1.2 mi away (different city)
- 640 5th Ave S, Kent: $1,140,000 (2025-05), 3,839 SF, $285,000/door, $296.95/SF, built 1980, 3.7 mi away (different city)
- 439 SW 156th St, Burien: $1,380,000 (2026-03), 6,516 SF, $153,333/door, $211.79/SF, built 1979, 4 mi away (different city)
- 429 SW 155th St, Burien: $1,688,800 (2025-01), 5,648 SF, $211,100/door, $299.01/SF, built 1978, 4.1 mi away (different city)
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.
Ownership tenure is not asserted for this parcel: the most recent recorded transfer is a non-market conveyance.
- 2019-06-24: $4,663,646 from RC Madrona II LLC to Washington State of/Department of Transportation (part of a 17-parcel sale; price is the whole deal), rec.
- 2006-06-29: $6,495,700 from Presidential Estates Apartment Associates LLC to RC Madrona II LLC (part of a 17-parcel sale; price is the whole deal), rec. 20060629002844
- 1997-01-02: transfer from Presidential Estates Apartment Assoc to Presidential Estates Apartment Assoc LLC (part of a 17-parcel sale; price is the whole deal), rec. 199701160164
Source: King County recorded sales extract; buyer and seller shown only when a company or organization. Individual names are withheld.
Land, site, and value history
Assessed value moved from $374,000 (2011) to $844,000 (2026), up 126% over 15 years, per county tax rolls. The 2026 roll splits $844,000 into $152,000 land and $692,000 improvements.
- Zoning: URM (per King County)
- Lot: 5,185 sq ft
- Nuisance flags: Airport noise
- Water: Water District (per King County)
- Sewer: Public (per King County)
- Access: Public
- Street surface: Paved
- Floor and use mix: Multiple Residence (Low Rise) 3,680 SF (county building sections)
- County districts report (schools, fire, sewer, council; on kingcounty.gov)