3400 Cascadia Ave S, Seattle, WA 98144 Property Records

King County property record for 3400 Cascadia Ave S, Seattle, WA 98144

Property Summary

Property Type	Single Family Home
Details	6 bd · 3.25 ba · 5,210 sqft · built 1936
Lot Size	0.187 acres (8,123 sqft)
Owner	2 Trust Names on File
Last Sale	$2,685,000 (Jul 2021)
Tax Bill	$26,601 (2026)
Deeds & Mortgages	Feb 2026 Line of Credit Jan 2026 Line of Credit + 1 more
Flood Zone	Zone X (minimal risk)
APN	`570000-3885`

Property Details

APN / Parcel Number

Primary APN	`570000-3885`
Alternative APN	`570000388506`

Interior

Bedrooms	6 Beds
Full Baths	3.25 Baths
Half Baths	1 Half Bath
Stories	1 Story
Building Area	5,210 sqft Living Area
Gross Area	5,870 sqft
1st Floor Area	1,810 sqft
Upper Floors Area	1,490 sqft
Basement Area	1,910 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1936
Effective Year Built	Effective 1936
Exterior Material	Brick
Lot Area	8,123 sqft (0.187 acres)
View / Lot	Water View
Garage Type	Attached
Garage Area	660 sqft
Parking Spaces	2 Parking Spaces
Deck Area	840 sqft

Utilities, Heating & Cooling

Heating System	Heat Pump
Heating Fuel	Electric
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Account Number	570000388506
Street Address	3400 CASCADIA AVE S
City	SEATTLE
State	WA
Zip	98144-7214
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	NR2
Legal Description	MOUNT BAKER PARK ADD PLAT BLOCK: 60 PLAT LOT: 1
Legal Range	04
Legal Township	24
Legal Section	15
Legal Subdivision	MOUNT BAKER PARK ADD
Legal Block	60
Legal Lot Number	1
Jurisdiction	KING WA
Township / Civil Division	SEATTLE
Census Block Group	2
Census Block	2003
Census Tract	10102

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic District	Within the Mount Baker Park Historic District listed 2018 · 649 contributing resources · NRIS 100002975

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

Owner

3400 Cascadia Ave S is owner-occupied and held in a trust since January 2026.

Source: King County records, as of October 15, 2026

Owner of Record	2 Trust Names on File
Mailing Address	3400 CASCADIA AVE S, SEATTLE, WA 98144-7214
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Feb 24, 2026	Deed of Trust, Mortgage · Line of Credit WASHINGTON TRUST BANK
Jan 30, 2026	Intrafamily Transfer, Transfer · Line of Credit WASHINGTON TRUST BANK
Jul 15, 2021	Warranty Deed, Transfer RAINIER TITLE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 15, 2021 · Amount on File
Deed Sale	Jul 15, 2021 · Amount on File
Prior Sale	Oct 25, 1984 · Amount on File
Deed Document Number	2021990
Last Transfer Date	Jan 30, 2026
Transfer Doc	0000000802
Record Updated	Oct 29, 2026

February 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	KING WA
Property Address	3400 CASCADIA AVE S, SEATTLE, WA 98144-7214
Transaction Type	Mortgage
Record Updated	Mar 4, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3400 CASCADIA AVE S, SEATTLE, WA 98144-7214

Mortgage

Document Number	0000000098
Date	Feb 24, 2026
Instrument	20260224000098

Lender

Name	WASHINGTON TRUST BANK
Type	Bank
Address	SEATTLE, WA 98101

Agreement

Type	Line of Credit
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

January 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	KING WA
Recording Date	Jan 30, 2026
Property Address	3400 CASCADIA AVE S, SEATTLE, WA 98144-7214
Document Number	0000000802
Map Reference	VOL 16 PG 3
Instrument Date	Jan 30, 2026
Instrument	20260130000802
Transaction Type	Transfer
Record Updated	Jul 1, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000000098
Date	Jan 30, 2026
Instrument	20260224000098

Lender

Name	WASHINGTON TRUST BANK
Type	Bank

Agreement

Type	Line of Credit
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

July 2021: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	KING WA
Recording Date	Jul 15, 2021
Property Address	3400 CASCADIA AVE S, SEATTLE, WA 98144-7214
Document Number	0000000990
Map Reference	VOL 16 PG 3
Instrument Date	Jul 8, 2021
Instrument	20210715000990
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	RAINIER TITLE

Transaction

Amount	Amount on Record
Tax	$64,317.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3400 CASCADIA AVE S, SEATTLE, WA 98144-7214

Tax Assessment & Valuation

The 2026 property tax bill for 3400 Cascadia Ave S was $26,601.

Source: King County assessment roll, as of July 7, 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

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$26,601.00
2025		$2,584,000 (+8.85%) Land $1,270,000 Building $1,314,000	$2,584,000 (+8.85%) Land $1,270,000 Building $1,314,000
2024	$22,775.00	$2,374,000 Land $1,270,000 Building $1,104,000	$2,374,000 Land $1,270,000 Building $1,104,000
2022	$20,551.00	$2,425,000 Land $1,184,000 Building $1,241,000	$2,425,000 Land $1,184,000 Building $1,241,000

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

Flood

FEMA maps place 3400 Cascadia Ave S in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective September 23, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	1 in force

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.

Wildfire

The area around 3400 Cascadia Ave S has no burnable land within ember reach, so its wildfire risk is not rated.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	SEATTLE PUBLIC UTILITIES serves 1,161,961 people · EPA ID WA5377050
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, 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 168 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 2,000

May also be available: AT&T, CenturyLink, T-Mobile, Verizon.

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