Updated: May 16, 2026
Location
Address
23217 SE 48TH ST, Issaquah, WA, 98029
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48 Th Design Construction
48 Th Design LLC, 23217 SE 48th St, Issaquah, WA (Owned by: Trefethen, Kasey Ann) holds a Construction Contractor, General license and 1 other license according to the Tukwila license board.
Their BuildZoom score of 94 ranks in the top 24% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring 48 Th Design LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
48 Th Design LLC Services
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48 Th Design LLC Contact Information
Phone Number: (425) 256-1417
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Address: 23217 SE 48TH ST, Issaquah, WA 98029
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Verified License
BuildZoom confirmed this contractor's license
48 Th Design LLC License info
License Not Verified
| License # | 48THDDL766KT |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of May, 2026. Check the current license status of 48 Th Design LLC with the The City of Tukwila, WA
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 48THDDL766KT |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for 48 Th Design LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Insured
| Insurer | Hartford Underwriters Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Ohio Cas Ins Co |
| Bond Value | $12,000 |
48 Th Design LLC Employees
KT
Kasey Trefethen
Partner/Member
ST
Sean Trefethen
Partner/Member
TA
Trefethen, Kasey Ann
Owner