809 5th Ave, Seattle, WA 98104 Property Records

King County property record for 809 5th Ave, Seattle, WA 98104

Property Summary

Property Type	Commercial Office
Details	181,037 sqft
Lot Size	0.371 acres (16,162 sqft)
Owner	Company Name on File
Tax Bill	$842,305 (2026)
Flood Zone	Zone X (minimal risk)
APN	`515850-0020`

Property Details

APN / Parcel Number

Primary APN	`515850-0020`
Alternative APN	`515850002004`

Interior

Building Area	181,037 sqft Total Area

Exterior

Architectural Style	Custom Design
Lot Area	16,162 sqft (0.371 acres)
Garage Area	118,843 sqft

Utilities, Heating & Cooling

Sewer	Municipal
Water Source	Commercial

Location & Zoning

Account Number	515850002004
Street Address	809 5TH AVE
City	SEATTLE
State	WA
Zip	98104-1608
Property Category	Commercial
Property Type	Commercial > Office > Commercial Office
Local Zoning Code	DOC1 U/450
Legal Description	THE MARK CONDOMINIUM PCT UND INT 23.46
Legal Subdivision	MARK, THE
Jurisdiction	KING WA
Township / Civil Division	SEATTLE
Census Block Group	2
Census Block	2000
Census Tract	8102

Owner

Source: King County records · APN 515850-0020

Assessment roll updated July 7, 2026 · Last verified July 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Company Name on File
Mailing Address	750 3RD AVE, 27, NEW YORK, NY 10017-2702
Owner Type	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: King County records · Assessment roll updated July 7, 2026 · Last verified July 2026

Property Jurisdictions

Type	Name
State	Washington
County	King County
Municipality	Seattle City
Unified School District	Seattle Public Schools (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$842,305.00 (-0.98%)
2025		$84,880,400 (-8.13%) Land $6,066,500 Building $78,813,900	$84,880,400 (-8.13%) Land $6,066,500 Building $78,813,900
2024	$850,669.00 (-3.88%)	$92,393,900 (-15.14%) Land $6,066,500 Building $86,327,400	$92,393,900 (-15.14%) Land $6,066,500 Building $86,327,400
2022	$885,053.00	$108,884,300 Land $5,876,900 Building $103,007,400	$108,884,300 Land $5,876,900 Building $103,007,400

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of September 23, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 2 (40% premium discount)
Nearby Flood Policies	3 in force

Wildfire

Wildfire Risk	Not rated no burnable land within ember reach

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Xfinity Cable · Fiber in parts of the area	2,000 / 2,000
Radiate Holdings Fiber · Cable	2,000 / 2,000
AT&T Fixed Wireless	100 / 20

May also be available: Google Fiber, Lumen Technologies, T-Mobile USA, Taluslink, Verizon.

Based on FCC filings for 149 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	SEATTLE PUBLIC UTILITIES serves 1,161,961 people
Water Source	Surface water
Last State Inspection	Jul 2025
Lead	2 ppb (2025) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them. The full violation and enforcement history is in the system's EPA record.