Updated: Nov 16, 2025
Location and Projects
Address
9520 Cty Rd 19 Suite D, Loretto, MN, 55357
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Blackstone Contractors Plumber
Blackstone Contractors, LLC, 9520 Cty Rd, Loretto, MN (Owned by: Bruce Karvonen) holds a Contractor Registration license and 3 other licenses according to the Minnesota license board.
Their BuildZoom score of 98 ranks in the top 16% of 77,973 Minnesota licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Blackstone Contractors, LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Blackstone Contractors, LLC Services
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Blackstone Contractors, LLC Contact Information
Phone Number: (763) 445-2107
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Address: 9520 Cty Rd 19 Suite D, Loretto, MN 55357
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Blackstone Contractors, LLC Loretto
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Blackstone Contractors, LLC has a BuildZoom score of 98, which places them above 84% of 77,973 contractors in Minnesota.
Activity
|
2 projects
|
2025 |
|
1 project
|
2024 |
Our building permit records indicate that Blackstone Contractors, LLC has worked on at least
3.0 projects over the past year.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
2 projects
|
< $5k |
|
1 project
|
$50k-$100k |
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by Blackstone Contractors, LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Footings for signs on three rivers district project at (2) three rivers locations
Valuation:
$2,500
Permit #:
MG407164
Status:
applied
Fee:
$63
Permit Type:
Commercial - ftg/fdn
Building Type:
N/A
Sign footings three rivers park
Valuation:
$2,500
Permit #:
EP198169
Status:
issued
Fee:
$208
Permit Type:
Public
Building Type:
N/A
Perl gardens - retaining wall
Valuation:
$260,000
Permit #:
P202010374
Status:
triage
Fee:
N/A
Permit Type:
Building - access...
Building Type:
Non-res - commerical
Village park arbor installation
Valuation:
$81,340
Permit #:
MG396841
Status:
issued
Fee:
$1,484
Permit Type:
Comm/ind/pub-alt
Building Type:
N/A
Monument sign footings
Valuation:
$75,000
Permit #:
SA026830
Status:
issued
Fee:
$38
Permit Type:
Monument sign foo...
Building Type:
N/A
Monument sign footings
Valuation:
$69,000
Permit #:
SA026829
Status:
issued
Fee:
$35
Permit Type:
Monument sign foo...
Building Type:
N/A
Retaining walls
Valuation:
$346,112
Permit #:
EP147394
Status:
issued
Fee:
$173
Permit Type:
Commercial
Building Type:
N/A
Monument sign
Valuation:
$69,000
Permit #:
SA026823
Status:
approved
Fee:
N/A
Permit Type:
Freestanding
Building Type:
N/A
No Description Available
Valuation:
$322,576
Permit #:
MG307888
Status:
final
Fee:
$3,862
Permit Type:
Retaining wall
Building Type:
N/A
Sign footing
Valuation:
$1,250
Permit #:
MG407940
Status:
applied
Fee:
$54
Permit Type:
Commercial - ftg/fdn
Building Type:
N/A
Retaining wall in creek
Valuation:
N/A
Permit #:
SL302967
Status:
final
Fee:
N/A
Permit Type:
Erosion and sedim...
Building Type:
N/A
Dori
Valuation:
$43,000
Permit #:
20 15 149470 NEW 00 B
Status:
final
Fee:
N/A
Permit Type:
Accessory structure
Building Type:
N/A
Copy to read: pedro park - 114 10th street e. - city of saint paul parks & recreation new freestanding sign on corner of 10th and robert
Valuation:
$6,200
Permit #:
20 20 090209 SGN 00 BS
Status:
final
Fee:
N/A
Permit Type:
Signs
Building Type:
N/A
Grading - marydale park improvements. demo/removals and nw playground sidewalk stairs etc
Valuation:
$243,300
Permit #:
20 18 056875 REM 00 B
Status:
issued
Fee:
N/A
Permit Type:
Institutional
Building Type:
N/A
Install new garage screening devices (fence wall and gates)
Valuation:
$20,000
Permit #:
ED143218
Status:
final
Fee:
$603
Permit Type:
Parking garage/ra...
Building Type:
N/A
Repair
Valuation:
$140,000
Permit #:
15 138487 RPR 00 B
Status:
issued
Fee:
N/A
Permit Type:
Institutional
Building Type:
N/A
Grading. grading. grading - parque castillo - play area and splash pad project
Valuation:
$556,500
Permit #:
20 18 056869 RPR 00 B
Status:
final
Fee:
N/A
Permit Type:
Institutional
Building Type:
N/A
Entry monument sign
Valuation:
$146,120
Permit #:
EP158101
Status:
final
Fee:
$73
Permit Type:
Commercial
Building Type:
N/A
Plans attached; 2615 weston lane; brynwoodcommunity pool house
Valuation:
$260,000
Permit #:
P201501549
Status:
final
Fee:
$14,562
Permit Type:
Building new cons...
Building Type:
N/A
Wayfinding system streetscape improvements
Valuation:
$80,000
Permit #:
ED131567
Status:
issued
Fee:
$1,608
Permit Type:
Parking garage/ra...
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Blackstone Contractors, LLC License info
Verified License
| License # | IR690911 |
| Status | Active |
| State | Minnesota |
| Type | Contractor Registration |
| Business Type | Not Available |
- BuildZoom verified this license was active as of May 2025.
Verify this license's status for Blackstone Contractors, LLC at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | IR690911 |
| Status | Active |
| State | Minnesota |
| Type | Contractor Registration |
| Business Type | Not Available |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Blackstone Contractors, LLC at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PB667198 |
| 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 Blackstone Contractors, LLC at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PB667198 |
| 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 Blackstone Contractors, LLC at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
51
Permits
- Building permit records show that Blackstone Contractors, LLC has worked on 51 permitted projects.
Blackstone Contractors, LLC Employees
BK
Bruce D. Karvonen
BK
Bruce Karvonen
Owner