Investor Profile - WA
Sean Trefethen
Sean Trefethen is a real estate investor and operator based in Seattle-Tacoma, WA. Public filings show activity across 3 properties held through 3 holding companies. Recent mortgage relationships include Umpqua Bank, NORTHWEST BUSINESS DEVELOPMENT ASSN, and NORTHWEST BUSINESS DEVELOPMENT ASSOCIATI.
Sean's Activity
As of June 2026, public records show approximately $4.2M in recorded mortgage exposure linked to this investor across at least 8 mortgage filings and 3 properties held through 3 holding companies. Activity appears concentrated in industrial and commercial assets recorded between 2018 and 2022.
Associated People
Primary Geography
Seattle-Tacoma, WA
ZIP codes: 98108, 98134, and 98260
Most activity in SEATTLE and LANGLEY.
Property Type Breakdown
Associated Entities (3)
WA · 2 properties · 6 mortgages
WA · 0 properties · 1 mortgage
+1 more entities not shown
Mortgages (8)
Top Lenders
$2.3M · 2 loans
$1.4M · 1 loan
$525k · 1 loan
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 05/25/2022 | $1.4M | Open | NORTHWEST BUSINESS DEVELOPMENT ASSN | SBTRE LLC | - |
| 12/20/2021 | $1.3M | Closed | Umpqua Bank | SBTRE LLC | 3430 E MARGINAL WAY S, SEATTLE, WA 98134 |
+6 more not shown
Owned Properties (3)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 3430 E MARGINAL WAY S, SEATTLE, WA 98134 | SBTRE LLC | Owns - 4.5 yrs | $3.3M |
| 212 1ST ST, LANGLEY, WA 98260 | 212 214 LANGLEY LLC | Owns - 5.6 yrs | $750k |
+1 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in industrial and commercial properties across Seattle-Tacoma, WA.
What companies is Sean Trefethen associated with?
Sean Trefethen is associated with 3 entities based on extracted signatures from public records. Key entities include SBTRE LLC, 212 214 LANGLEY LLC, and TREFETHEN & CO LLC.
How many properties are associated with this investor?
At least 3 properties are associated with Sean Trefethen and the entities they control, based on signatures extracted from recorded documents connecting Sean Trefethen to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Umpqua Bank, NORTHWEST BUSINESS DEVELOPMENT ASSN, and NORTHWEST BUSINESS DEVELOPMENT ASSOCIATI, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2018 through 2022, with the most recent mortgage recorded in 2022.
How is associated activity determined?
Elementix uses AI to extract signatures from recorded documents. These signatures are used to determine the relationships between people and entities. This is a novel approach that goes beyond looking at corporate filings and skip-tracing.
The information displayed on this page is compiled from recorded real estate documents, business filings, and other lawfully available sources. Elementix summarizes and analyzes public record activity related to investment real estate and associated business entities. Any contact indicators shown (such as email domain references or partial phone digits) are provided solely as unverified signals and may be incomplete or outdated.
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