366 Prospect St, Seattle, WA 98109 Property Records

King County property record for 366 Prospect St, Seattle, WA 98109

Property Summary

Property Type	Single Family Home
Details	4 bd · 3.25 ba · 3,180 sqft · built 1924
Lot Size	0.099 acres (4,320 sqft)
Owner	2 Individual Names on Record
Last Sale	$2,150,000 (Jul 2019)
Tax Bill	$27,732 (2026)
Deeds & Mortgages	Jul 2019 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`545780-0950`

Property Details

APN / Parcel Number

Primary APN	`545780-0950`
Alternative APN	`545780095000`

Interior

Bedrooms	4 Beds
Full Baths	3.25 Baths
Half Baths	2 Half Baths
Stories	3 Stories
Building Area	3,180 sqft Living Area
Gross Area	3,580 sqft
1st Floor Area	1,280 sqft
2nd Floor Area	1,230 sqft
Upper Floors Area	670 sqft
Basement Area	400 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1924
Effective Year Built	Effective 1993
Lot Area	4,320 sqft (0.099 acres)
View / Lot	Water View
Garage Type	Attached
Garage Area	400 sqft
Parking Spaces	2 Parking Spaces
Deck Area	200 sqft

Utilities, Heating & Cooling

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

Location & Zoning

Account Number	545780095000
Street Address	366 PROSPECT ST
City	SEATTLE
State	WA
Zip	98109-3752
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	NR3
Legal Description	MERCERS 2ND ADD TO N SEATTLE W 54.5 FT OF E 109.5 FT OF FOLG-1 & S 20 FT OF 2
Legal Range	04
Legal Township	25
Legal Section	30
Legal Subdivision	MERCERS 2ND ADD TO N SEATTLE
Legal Block	31
Legal Lot Number	1-2
Jurisdiction	KING WA
Township / Civil Division	SEATTLE
Census Block Group	1
Census Block	1002
Census Tract	6702

Owner

Source: King County records, as of July 7, 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 Record
Mailing Address	366 PROSPECT ST, SEATTLE, WA 98109-3752
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 31, 2019 · Amount on Record
Deed Sale	Jul 31, 2019 · Amount on Record
Prior Sale	Jun 8, 2016 · Amount on Record
Deed Document Number	20191171
Prior Transfer Date	Jul 21, 1992
Prior Transfer Doc	0007271043
Record Updated	Oct 29, 2026

July 2019: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	KING WA
Recording Date	Jul 31, 2019
Property Address	366 PROSPECT ST, SEATTLE, WA 98109-3752
Document Number	0000001171
Map Reference	VOL 2 PG 7
Instrument Date	Jul 29, 2019
Instrument	20190731001171
Transaction Type	Transfer
Record Updated	Sep 15, 2021
Title Company	CW TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$38,275.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	366 PROSPECT ST, SEATTLE, WA 98109-3752

Mortgage

Document Number	0000001172
Date	Jul 31, 2019
Instrument	20190731001172

Lender

Name	CITIBANK NA
Type	Bank

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Aug 1, 2049

Interest

Rate Type	Adjustable Rate
Rate	2.87%
Type Change Date	Aug 1, 2026
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	7.87%
Index	1-Year LIBOR
Max Rate	7.87%

Tax Assessment & Valuation

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	$27,732.00 (+9.63%)
2025		$2,736,000 (+1.82%) Land $1,608,000 Building $1,128,000	$2,736,000 (+1.82%) Land $1,608,000 Building $1,128,000
2024	$25,296.00 (+11.95%)	$2,687,000 (-1.21%) Land $1,608,000 Building $1,079,000	$2,687,000 (-1.21%) Land $1,608,000 Building $1,079,000
2022	$22,595.00	$2,720,000 Land $1,702,000 Building $1,018,000	$2,720,000 Land $1,702,000 Building $1,018,000

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

Flood

Source: FEMA National Flood Hazard Layer, effective September 23, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

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 630 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
CenturyLink Fiber	8,000 / 8,000
Xfinity Cable · Fiber in parts of the area	2,000 / 2,000
Verizon Fixed Wireless	1,000 / 75
T-Mobile Fixed Wireless	100 / 20

May also be available: Astound Broadband, AT&T, FiberFirst, Google Fiber.

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