Updated: Jul 10, 2026
Location and Projects
Address
911 South 9th, Bismarck, ND, 58502
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Ha Thompson & Sons HVAC/Mechanical Contractor
Ha Thompson & Sons Inc, 911 S 9th, Bob Ehli, Bismarck, ND (Owned by: Mark Thompson) holds a Construction license and 10 other licenses according to the Mandan license board.
Their BuildZoom score of 106 ranks in the top 7% of 13,075 North Dakota licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Ha Thompson & Sons Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Ha Thompson & Sons Inc Contact Information
Phone Number: (701) 720-3920
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Address: 911 South 9th, Bob Ehli, Bismarck, ND 58502
Edit
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Building Permits by Ha Thompson & Sons Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Lines for gas heat and air building a
Valuation:
N/A
Permit #:
BMEC2024-0305
Status:
issued
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
Lines for gas heat and air building b
Valuation:
N/A
Permit #:
BMEC2024-0304
Status:
issued
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
Under and above ground plumbing phase i
Valuation:
N/A
Permit #:
BPLB2024-0012
Status:
final
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
Lines for gas heat and air
Valuation:
N/A
Permit #:
BMEC2023-0668
Status:
final
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
Lines for gas heat and air phase 1 &2
Valuation:
N/A
Permit #:
BMEC2024-0125
Status:
final
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
Under and above ground
Valuation:
N/A
Permit #:
BPLB2023-0126
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Under and above ground plumbing phase 2
Valuation:
N/A
Permit #:
BPLB2024-0053
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Lines for gas heating and air
Valuation:
N/A
Permit #:
BMEC2022-0476
Status:
final
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
Under and above ground plumbing
Valuation:
N/A
Permit #:
BPLB2023-0415
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Lines for gas heat and air
Valuation:
N/A
Permit #:
BMEC2023-1553
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
5th & 6th floor remodel
Valuation:
N/A
Permit #:
BMEC2023-1061
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Under and above ground plumbing
Valuation:
N/A
Permit #:
BPLB2024-0030
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Lines gas/heat/air 4th fl
Valuation:
N/A
Permit #:
BMEC2024-0856
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Under and above ground plumbing building b
Valuation:
N/A
Permit #:
BPLB2024-0032
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Under and above ground plumbing building b
Valuation:
N/A
Permit #:
BPLB2024-0031
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Missouri slope lutheran care center
Valuation:
N/A
Permit #:
BMEC2020-0147
Status:
final
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
Missouri slope lutheran care center
Valuation:
N/A
Permit #:
BPLB2020-0036
Status:
final
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
Lines for gas heat and air remodel
Valuation:
N/A
Permit #:
BMEC2019-0746
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Under and above ground plumbing
Valuation:
N/A
Permit #:
BPLB2024-0139
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Lines for gas heat and air
Valuation:
N/A
Permit #:
BMEC2023-1690
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
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Ha Thompson & Sons Inc Reviews
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Recent Buildzoom Projects
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Verified License
BuildZoom confirmed this contractor's license
Ha Thompson & Sons Inc License info
Verified License
| Status | Active |
| City | Mandan |
| Type | Construction |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Ha Thompson & Sons Inc at the City of Mandan.
This is a sample of licensing data; click here to access a complete history.
Verified License
| Status | Active |
| State | North Dakota |
| Type | Electrician |
- BuildZoom verified this license was active as of July 2026.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 42282 |
| Status | Active |
| City | Mandan |
| Type | Construction |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Ha Thompson & Sons Inc with the City of Mandan
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 24-0054 |
| Status | Active |
| City | Mandan |
| Type | Construction |
| Date Issued | 12-27-2026 |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Ha Thompson & Sons Inc with the City of Mandan
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | MB699133 |
| Status | Active |
| State | Minnesota |
| Type | Mechanical Contractor Bond |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Ha Thompson & Sons Inc at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| State | North Dakota |
| Type | Contractor |
| Date Issued | 03-01-2026 |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Ha Thompson & Sons Inc with the North Dakota Secretary of State
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | WSI7232632 |
| Status | Active |
| City | Mandan |
| Type | Water And Sewer Installer |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Ha Thompson & Sons Inc with the City of Mandan
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | MPLUM2632140 |
| Status | Active |
| City | Mandan |
| Type | Plumbing Contractor License |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Ha Thompson & Sons Inc with the City of Mandan
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | FG6006999 |
| Status | Active |
| City | Mandan |
| Type | Fuel And Gas Installer |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Ha Thompson & Sons Inc with the City of Mandan
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PC676191 |
| Status | Inactive |
| State | Minnesota |
| Type | Plumbing |
- According to the Minnesota Department of Labor & Industry, 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 Ha Thompson & Sons Inc at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | MEC9200526 |
| Status | Inactive |
| City | Williston |
| Type | Mechancial Contractor |
- According to the City of Williston, 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 Ha Thompson & Sons Inc at the City of Williston.
This is a sample of licensing data; click here to access a complete history.
106
BuildZoom Score
2.7K
Permits
- Building permit records show that Ha Thompson & Sons Inc has worked on 2659 permitted projects.
Ha Thompson & Sons Inc Employees
CF
Chad Forderer
MT
Mark Thompson
Owner