Updated: Jun 20, 2026
Location and Projects
Address
3990 - 27th Street SE, Buffalo, MN, 55313
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Gridor Construction HVAC/Mechanical Contractor
Gridor Construction Inc, 3990 27th St SE, Buffalo, MN (Owned by: Greg Theisen) holds a Contractor Registration license and 10 other licenses according to the Minnesota license board.
Their BuildZoom score of 97 ranks in the top 18% of 77,973 Minnesota licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Gridor Construction Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Gridor Construction Inc Contact Information
Phone Number: (763) 559-3736
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Address: 3990 - 27th Street SE, Buffalo, MN 55313
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Building Permits by Gridor Construction Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
(100 leeds rd) construction of a new filter building for the city of hoyt lakes wastewater treatment facility
Valuation:
N/A
Permit #:
PB-P2109-0020
Status:
issued
Fee:
$301
Permit Type:
N/A
Building Type:
N/A
Constrution renovations of a municipal wastewater treatment plant
Valuation:
N/A
Permit #:
BPV-P2112-005
Status:
final
Fee:
$320
Permit Type:
New installation
Building Type:
N/A
(1060 11th street) new building with new services
Valuation:
N/A
Permit #:
PB-P2410-0039
Status:
issued
Fee:
$301
Permit Type:
N/A
Building Type:
N/A
Addition to concrete clearwell to existing water treatment facility
Valuation:
N/A
Permit #:
LA140044
Status:
final
Fee:
$24,229
Permit Type:
Tax exempt addn/rmdl
Building Type:
N/A
Stormwater storage tank construction
Valuation:
$250,000
Permit #:
NH048271
Status:
final
Fee:
$125
Permit Type:
Undefined
Building Type:
N/A
New development
Valuation:
$80,000
Permit #:
MG301144
Status:
final
Fee:
$1,230
Permit Type:
Storm sewer
Building Type:
N/A
30 x 16 digester building
Valuation:
$150,000
Permit #:
AX000086
Status:
final
Fee:
$2,176
Permit Type:
Industrial
Building Type:
N/A
Unoccupied water utility pumping station
Valuation:
N/A
Permit #:
B-105622
Status:
final
Fee:
N/A
Permit Type:
None
Building Type:
N/A
Constr a 45-8x31-4 pump station per plans one story slab w
Valuation:
N/A
Permit #:
B-103926
Status:
final
Fee:
N/A
Permit Type:
None
Building Type:
N/A
New development
Valuation:
$80,000
Permit #:
MG301144
Status:
Applied
Fee:
$20
Permit Type:
Storm sewer
Building Type:
N/A
Plans attached - bass lake lift station - adding 1 water line & 2 hose bibs ( includes 1 water meter )
Valuation:
N/A
Permit #:
P20055782
Status:
final
Fee:
$403
Permit Type:
N/A
Building Type:
N/A
Plans attached gridor const inc install drywall in existing storage space to use as
Valuation:
N/A
Permit #:
P20010509
Status:
ISSUED
Fee:
$186
Permit Type:
Building alteration
Building Type:
N/A
Drop 2 sprinklers into new 17'-10'-4 office & relocate 1 sprinkler in 10'-4'x11'0
Valuation:
N/A
Permit #:
P20011088
Status:
ISSUED
Fee:
$25
Permit Type:
Fire protection a...
Building Type:
N/A
Plans attached - bass lake lift station - a2005022 - special insp to verify receipt of
Valuation:
N/A
Permit #:
P20054225
Status:
ISSUED
Fee:
$13,367
Permit Type:
Building addition
Building Type:
N/A
No plans gridor constr inc. ductwork modifications for new office space
Valuation:
N/A
Permit #:
P20011034
Status:
ISSUED
Fee:
$25
Permit Type:
Mechanical altera...
Building Type:
N/A
Constr a retaining wall 71 lin ft approx 7-6 high per
Valuation:
N/A
Permit #:
B-103927
Status:
final
Fee:
N/A
Permit Type:
None
Building Type:
N/A
Remove & replace lift station
Valuation:
N/A
Permit #:
SL155809
Status:
applied
Fee:
N/A
Permit Type:
Utility work abov...
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
C20055031
Status:
plancheck
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Changing elbow in existing forcemain
Valuation:
N/A
Permit #:
SL162221
Status:
final
Fee:
$100
Permit Type:
Utility work belo...
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Gridor Construction Inc License info
Verified License
| License # | IR654111 |
| Status | Active |
| State | Minnesota |
| Type | Contractor Registration |
| Business Type | Not Available |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Gridor Construction Inc at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | MB683354 |
| Status | Active |
| State | Minnesota |
| Type | Mechanical Contractor Bond |
| Business Type | Not Available |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Gridor Construction Inc at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | BC190128 |
| Status | Active |
| State | Minnesota |
| Type | Residential Contractors |
| Business Type | Not Available |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Gridor Construction Inc at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | C091508 |
| Status | Active |
| State | Iowa |
| Type | Contractor |
| Date Issued | 05-06-2026 |
| Business Type | Not Available |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Gridor Construction Inc at the Iowa Workforce Development Agency.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | R1699 |
| Status | Active |
| City | Duluth |
| Business Type | Not Available |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Gridor Construction Inc with the The City of Duluth, MN
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 3898 |
| Status | Active |
| State | North Dakota |
| Type | Contractor |
| Business Type | Not Available |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Gridor Construction Inc with the North Dakota Secretary of State
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PR004347 |
| Status | Inactive |
| State | Minnesota |
| Type | Plumbing |
| Business Type | Not Available |
- 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 Gridor Construction 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 # | PB757405 |
| Status | Inactive |
| State | Minnesota |
| Type | Plumbing |
| Business Type | Not Available |
- 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 Gridor Construction 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 # | PR004347 |
| Status | Inactive |
| State | Minnesota |
| Type | Plumbing |
| Business Type | Not Available |
- 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 Gridor Construction 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 # | MR80859 |
| Status | Inactive |
| State | Minnesota |
| Type | Restricted Master Plumber |
| Business Type | Not Available |
- 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 Gridor Construction 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 # | 20190128 |
| Status | Inactive |
| State | Minnesota |
| Type | Residential Building Contr |
| Business Type | Not Available |
- 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 Gridor Construction Inc at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bond Value | $25,000 |
13
Permits
- Building permit records show that Gridor Construction Inc has worked on 13 permitted projects.
Gridor Construction Inc Employees
GT
Greg H Theisen
Owner
GT
Greg Theisen
Owner
GS
Gregg Schreiner
GT
Gregory H. Theisen