Location and Projects
A-one Geothermal Construction
Serving communities throughout the Midwest from its base in Earlham, Iowa, A-One Geothermal Inc. brings over 30 years of experience to geothermal and underground utility projects. Since 1975, the company has delivered directional drilling services for both public and private clients, working on everything from geothermal heating and cooling installations to water, sewer, septic, and fiber optic system projects. A-One Geothermal’s portfolio includes work for homeowners, homebuilders, HVAC installers, schools, and commercial properties. Specialized crews manage vertical, horizontal, header, and purging operations, enabling the company to take on complex underground installations. Through a partnership with Ohman Solutions, A-One Geothermal offers advanced chemical cleaning for heat exchange equipment, effectively removing scale, sugar, oil, and other contaminants to ensure optimal system performance.
A-one Geothermal Inc Services
A-one Geothermal Inc Contact Information
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A-one Geothermal Inc License info
Verified License
| License # | 37433-26 |
| Status | Active |
| State | Nebraska |
| Type | Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for A-one Geothermal Inc at the Nebraska Department of Labor.
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Verified License
| License # | C102444 |
| Status | Active |
| State | Iowa |
| Type | Contractor |
| Date Issued | 12-05-2025 |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for A-one Geothermal Inc at the Iowa Workforce Development Agency.
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Inactive License
| License # | AONEGGI925P5 |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Corporation |
- According to the Washington State Department of Labor & Industries, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for A-one Geothermal Inc at the Washington State Department of Labor & Industries.
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98
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Bonded
| Bonded Agent | Merchants Bonding Co (Mutual) |
| Bond Value | $6,000 |