Updated: May 22, 2026
Location and Projects
Address
31409 55th Ave S, Auburn, WA, 98001
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Keystone Construction LLC Photos
Keystone Construction LLC
Kitchen & Bath Remodel
Home Improvements & Repairs
Water & Fire Damage Restoration Certified
From BuildZoom: Keystone Construction LLC, 31409 55th Ave S, Auburn, WA holds a Construction Contractor, General license and 1 other license according to the Tukwila license board.
Their BuildZoom score of 108 ranks in the top 5% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Keystone Construction LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Keystone Construction LLC Services
Start a project today:
Custom Home Build
New Home Construction
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Other Residential Remodel
Roofing
Hardwood Flooring
Carpets
Laminate Flooring
Other Flooring
Framing
Wood Fences
Backsplash and Countertops
Stonework
Tile Flooring
Other Stone and Tile
Gutters and Flashing
Skylights
Small Multi-Family New Cons...
Small Multi-Family Remodel ...
Whole Home Remodel
Modular Home Construction
Attic Remodel
Single Room Remodel
Cosmetic Remodel
Keystone Construction LLC Contact Information
Phone Number: (206) 486-4306
Address: 31409 55th Ave S, Auburn, WA 98001
Building Permits by Keystone Construction LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Wallach sandra luisa & aaron|when submitting an application please ensure you have attached all required documents.|certification: by using this p-ortal to apply for permits i certify i am the owner of the property or the owner's authorized agent. if acting as an authorized agent i further certify that i have full power and authority to file this application and to perform on behalf o... see more
Valuation:
N/A
Permit #:
D25-0078
Status:
final
Fee:
$805
Permit Type:
Single family rem...
Building Type:
N/A
Keystone Construction LLC Reviews
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Verified License
BuildZoom confirmed this contractor's license
Keystone Construction LLC License info
Verified License
| License # | KEYSTCL822L1 |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Keystone Construction LLC at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | KEYSTCL822L1 |
| 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 Keystone Construction LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
Insured
| Insurer | Certain Underwriter's At Lloyd |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Western Surety Co |
| Bond Value | $12,000 |