Updated: Jul 13, 2026
Location and Projects
Address
923 N Second Street, Saint Charles, MO, 63301
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Karl Leiber Heating & Air Conditioning
Karl Leiber Heating & Air Conditioning, 923 N Second St, St. Charles, MO (Owned by: Barrow Michael C.) holds a Mechanical license and 4 other licenses according to the St. Charles County license board.
Their BuildZoom score of 93 ranks in the top 27% of 23,328 Missouri licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Karl Leiber Heating & Air Conditioning, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Karl Leiber Heating & Air Conditioning Services
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Karl Leiber Heating & Air Conditioning Contact Information
Phone Number: (636) 947-0428
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Address: 923 N Second Street, St. Charles, MO 63301
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Karl Leiber Heating & Air Conditioning St. Charles
Quality
93
73rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Karl Leiber Heating & Air Conditioning has a BuildZoom score of 93, which places them above 73% of 23,328 contractors in Missouri.
Activity
|
1 project
|
2025 |
|
6 projects
|
2023 |
Our building permit records indicate that Karl Leiber Heating & Air Conditioning has worked on at least
7.0 projects over the past 3 years.
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.
Experience
|
7 projects
|
Mechanical projects |
|
7 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Karl Leiber Heating & Air Conditioning mostly works on
hvac project
and mechanical project
projects.
Pricing
|
7 projects
|
$5k-$20k |
The typical size of their permits is approximately $10,157. This graph shows the distribution of these job values.
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 Karl Leiber Heating & Air Conditioning
This is a sample of this contractor's permits. Click here to access their complete permit history.
2nd unit install a new 80% gas furnace 3 ton air conditioner & 3 ton evaporator coil
Valuation:
$12,839
Permit #:
25MEC-06421
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Install a new gas furnace air conditioner & evaporator coil
Valuation:
$10,157
Permit #:
MEP23-000437
Status:
complete
Fee:
$77
Permit Type:
Residential
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
$8,100
Permit #:
MEP22-001545
Status:
issued
Fee:
$62
Permit Type:
Residential
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
$10,877
Permit #:
MEP22-000922
Status:
complete
Fee:
$82
Permit Type:
Residential
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
$8,358
Permit #:
MEP22-000208
Status:
complete
Fee:
$63
Permit Type:
Residential
Building Type:
N/A
Install a new gas furnace air conditioning & evap. coil
Valuation:
N/A
Permit #:
2022-00001472
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
N/A
Permit #:
2022-00000804
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
N/A
Permit #:
2022-00000708
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 2 new gas furnaces 2 air conditioners & 2 evaporator coils
Valuation:
$16,632
Permit #:
MEP21-001321
Status:
complete
Fee:
$125
Permit Type:
Residential
Building Type:
N/A
Install new gas furnace air conditioner and evaporator coil
Valuation:
$11,224
Permit #:
MEP23-001769
Status:
issued
Fee:
$85
Permit Type:
Residential
Building Type:
N/A
Installation of ductless mini-split system for upstairs bedrooms
Valuation:
N/A
Permit #:
2021-00006533
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install a new modular blower air conditioner & evaporator coil
Valuation:
$8,060
Permit #:
MEP21-001444
Status:
complete
Fee:
$62
Permit Type:
Residential
Building Type:
N/A
Install a new gas furnace air conditioner & evaporator coil
Valuation:
$7,323
Permit #:
MEP21-001076
Status:
complete
Fee:
$83
Permit Type:
Commercial
Building Type:
N/A
Install a new gas furnace air conditioner & evaporator coil
Valuation:
N/A
Permit #:
2021-00006934
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
$8,363
Permit #:
MEP21-002186
Status:
complete
Fee:
$63
Permit Type:
Residential
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
$6,611
Permit #:
MEP21-001739
Status:
complete
Fee:
$62
Permit Type:
Residential
Building Type:
N/A
Install a new gas furnace air conditioner & evaporator coil
Valuation:
N/A
Permit #:
2021-00003478
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
$9,285
Permit #:
MEP21-001228
Status:
complete
Fee:
$70
Permit Type:
Residential
Building Type:
N/A
Install a new electric air handler and air conditioner
Valuation:
$5,573
Permit #:
21MEC-05079
Status:
issued
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Install new gas furnace air conditioner & evaporator coil
Valuation:
$7,009
Permit #:
MEP21-000189
Status:
complete
Fee:
$62
Permit Type:
Residential
Building Type:
N/A
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Karl Leiber Heating & Air Conditioning Reviews
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Verified License
BuildZoom confirmed this contractor's license
Karl Leiber Heating & Air Conditioning License info
Verified License
| Status | Active |
| County | St. Charles County |
| Type | Mechanical |
- BuildZoom verified this license was active as of July 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | X0211 |
| Status | Active |
| County | St Louis County |
| Type | Mechanical |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Karl Leiber Heating & Air Conditioning at the Saint Louis County Department of Public Works.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| County | St Louis County |
| Type | Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2020. Check the current license status of Karl Leiber Heating & Air Conditioning with the Saint Louis County Department of Public Works
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| County | St. Charles County |
| Type | Mechanical |
- According to the St. Charles County Department of Development & Business Services, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| County | St. Charles County |
| Type | Hvacr Contractor (Class A) |
- According to the St. Charles County Department of Development & Business Services, 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.
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
198
Permits
- Building permit records show that Karl Leiber Heating & Air Conditioning has worked on 198 permitted projects.
Karl Leiber Heating & Air Conditioning Employees
BC
Barrow Michael C.
Owner
KL
Karl Leiber
KC
Karl Leiber Heating & Air Cond
Owner
LK
Leiber Karl
Owner
RC
Ray Willie C.
Owner