521 20th Ave E, Seattle, WA 98112 Property Records

King County property record for 521 20th Ave E, Seattle, WA 98112

Property Summary

Property Type	Single Family Home
Details	2 bd · 1.75 ba · 1,600 sqft · built 1908
Lot Size	0.058 acres (2,545 sqft)
Owner	2 Individual Names on File
Last Sale	$990,000 (Nov 2025)
Tax Bill	$11,806 (2026)
Deeds & Mortgages	Nov 2025 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`440020-0070`

Property Details

APN / Parcel Number

Primary APN	`440020-0070`
Alternative APN	`440020007009`

Interior

Bedrooms	2 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Stories	1 Story
Building Area	1,600 sqft Living Area
Gross Area	2,200 sqft
1st Floor Area	930 sqft
Upper Floors Area	670 sqft
Basement Area	600 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1908
Effective Year Built	Effective 1908
Architectural Style	Triplex
Lot Area	2,545 sqft (0.058 acres)
Garage Type	Detached
Garage Area	220 sqft
Parking Spaces	1 Parking Space
Porch	Open Porch
Porch Area	40 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C
Heating Fuel	Electric
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Account Number	440020007009
Street Address	521 20TH AVE E
City	SEATTLE
State	WA
Zip	98112-4011
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LR2 (M)
Legal Description	LONGFELLOW ADD LOT A SEATTLE SP #2301047 REC #20030625900020 SD SP DAF LOT 14 OF SD ADD
Legal Range	04
Legal Township	25
Legal Section	28
Legal Subdivision	LONGFELLOW ADD
Legal Lot Number	14
Jurisdiction	KING WA
Township / Civil Division	SEATTLE
Census Block Group	1
Census Block	1012
Census Tract	7600

Owner

Source: King County records · APN 440020-0070

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	2 Individual Names on File
Mailing Address	521 20TH AVE E, SEATTLE, WA 98112-4011
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Married Couple

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Nov 05, 2025 · Amount on Record
Deed Sale	Nov 05, 2025 · Amount on Record
Prior Sale	Mar 03, 2011 · Amount on Record
Deed Document Number	2025921
Record Updated	Sep 20, 2026

November 2025: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	KING WA
Recording Date	Nov 05, 2025
Property Address	521 20TH AVE E, SEATTLE, WA 98112-4011
Document Number	0000000921
Map Reference	DOC 20030625900020
Instrument Date	Nov 05, 2025
Instrument	20251105000921
Transaction Type	Transfer
Record Updated	Nov 13, 2025
Title Company	WFG NATL TITLE COMPANY OF WA

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$16,682.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	521 20TH AVE E, SEATTLE, WA 98112-4011

Mortgage

Document Number	0000000922
Date	Nov 05, 2025
Instrument	20251105000922

Lender

Name	BOEING EMPLOYEES CU
Type	Credit Union
Address	SEATTLE, WA 98168

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Dec 01, 2055

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	$11,806.00 (+10.64%)
2025		$1,142,000 (+2.88%) Land $788,000 Building $354,000	$1,142,000 (+2.88%) Land $788,000 Building $354,000
2024	$10,671.00 (-0.14%)	$1,110,000 (-12.6%) Land $788,000 Building $322,000	$1,110,000 (-12.6%) Land $788,000 Building $322,000
2022	$10,686.00	$1,270,000 Land $525,000 Building $745,000	$1,270,000 Land $525,000 Building $745,000

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, King County (53033C), as of September 23, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 530330076001, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	1 in force
Nearby Flood Claims	1 (2017)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Feb 2017 · Severe Winter Storms, Flooding, Landslides, Mudslides

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	2,000 / 2,000
Lumen Technologies Fiber · DSL in parts of the area	2,000 / 1,000
Verizon Fixed Wireless	1,000 / 75
AT&T Fixed Wireless	100 / 20

May also be available: Radiate Holdings, T-Mobile USA.

Based on FCC filings for 851 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System, water system WA5377050, 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.