Updated: Apr 04, 2026
Location
Headquarters Address
St. Charles, MO, 63304
Local address
Saint Charles, MO, 63304
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Demtech Construction
Demtech, LLC, (Employees: 2008 Kolb Family Trust, Carrie Sue Kolb Greiwe, and Janet Kolb Irrevocable Trust 2018) holds a General Commercial license and 2 other licenses according to the Arizona license board.
Their BuildZoom score of 90 indicates that they are licensed or registered but we do not have additional information about them.
Their license was verified as active when we last checked. If you are thinking of hiring Demtech, LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
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Demtech, LLC Contact Information
Phone Number: (636) 441-0200
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Verified License
BuildZoom confirmed this contractor's license
Demtech, LLC License info
License Not Verified
| License # | 337776 |
| Status | Active |
| State | Arizona |
| Type | General Commercial |
- When BuildZoom last verified this license, it had an expiration date of April, 2026. Check the current license status of Demtech, LLC with the Arizona Registrar of Contractors
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 336733 |
| Status | Active |
| State | Arizona |
| Type | General Commercial |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Demtech, LLC at the Arizona Registrar of Contractors.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 332786 |
| Status | Active |
| State | Arizona |
| Type | Specialty Dual |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Demtech, LLC at the Arizona Registrar of Contractors.
This is a sample of licensing data; click here to access a complete history.
90
BuildZoom Score
Demtech, LLC Employees
2T
2008 Kolb Family Trust
Parent Entity
CG
Carrie Sue Kolb Greiwe
Secretary
J2
Janet Kolb Irrevocable Trust 2018
Parent Entity
JK
Janet Marie Kolb
President
JK
Jeffrey David Kolb
Manager
SK
Stephen Robert Krause
Treasurer
TG
Thomas Lee Greiwe
Qualifying Party