Updated: Jul 30, 2026
Location and Projects
Address
3901 Shirley Drive, Saint Louis, MO, 63121
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Mechanical Services Group
Mechanical Services Group, 3901 Shirley Dr, St. Louis, MO (Employees: Casey Heinhold and Casey Heinold) holds a Hvac Service Ins license and 3 other licenses according to the St Louis County license board.
Their BuildZoom score of 101 ranks in the top 12% of 23,328 Missouri licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mechanical Services Group, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Mechanical Services Group Contact Information
Phone Number: (314) 395-9355
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Address: 3901 Shirley Drive, St. Louis, MO 63121
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Mechanical Services Group St. Louis
Quality
101
88th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mechanical Services Group has a BuildZoom score of 101, which places them above 88% of 23,328 contractors in Missouri.
Activity
|
6 projects
|
2025 |
|
5 projects
|
2024 |
|
14 projects
|
2023 |
Our building permit records indicate that Mechanical Services Group has worked on at least
25.0 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
|
25 projects
|
Mechanical projects |
|
20 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Mechanical Services Group mostly works on
mechanical project
and hvac project
projects.
Pricing
|
12 projects
|
< $5k |
|
9 projects
|
$5k-$20k |
|
2 projects
|
$20k-$50k |
|
2 projects
|
$50k-$100k |
The typical size of their permits is approximately $4,850. 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 Mechanical Services Group
This is a sample of this contractor's permits. Click here to access their complete permit history.
Kinloch churchof god installation of : (2) five ton condensing units & evaporator coils (2) 80% 100 000 btu furnaces (1) 80% 80 000 btu furnace
Valuation:
$33,065
Permit #:
25MEC-01515
Status:
issued
Fee:
$237
Permit Type:
Replacement
Building Type:
N/A
Xcell williams heating and cooling shall provide and install: (7) 6 flex (140) main trunk runs 24x6 (1) 10 flex for return (3) return grills non filter rack (12) supply grills (1) goodman 16 seer heat pump 4 ton (1) lineset (1) drain line (1) filter rack (1) 2nd drain pan and switch (1) duct insulation bubble wrap
Valuation:
$31,650
Permit #:
23MEC-00886
Status:
issued
Fee:
$241
Permit Type:
Addition
Building Type:
N/A
Marmic fire - installation of (1) 7.5 ton remote terminal unit (1) 8.5 ton remote terminal unit and (1) 10 ton remote terminal unit
Valuation:
$64,000
Permit #:
25MEC-04687
Status:
issued
Fee:
$237
Permit Type:
Replacement
Building Type:
N/A
Please note this permit has a different scope of work than permit #24mec-02878. we are replacing the indoor heating unit. replacing air handler and heat kit not air conditioning
Valuation:
$2,285
Permit #:
24MEC-03628
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Red lobster - total installation of : (1) 15 ton remote terminal unit (1) 8.5 ton remote terminal unit (1) 7.5 ton remote terminal unit
Valuation:
$69,330
Permit #:
24MEC-07639
Status:
filed
Fee:
$237
Permit Type:
Replacement
Building Type:
N/A
Repair or replace all fire damaged interior walls & floors. repair or replace fire damaged areas on outside
Valuation:
$194,465
Permit #:
22BLD-00889
Status:
complete
Fee:
$1,024
Permit Type:
Fire-storm
Building Type:
N/A
Installation of 5 ton air handler condensing unit heat kit and line set
Valuation:
$11,500
Permit #:
25MEC-00621
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Installation of a 3 ton 13 seer goodman condensing unit evaporator coil and a 80, 000 btu 80% ruud furnace
Valuation:
$5,600
Permit #:
23MEC-04790
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Install (2) goodman 3 ton 16 seer two stage condensing units (2) two stage evaporators and (2) air handler units with electric heat kit 15 kws
Valuation:
$16,800
Permit #:
21MEC-04536
Status:
complete
Fee:
$158
Permit Type:
Replacement
Building Type:
N/A
This is a home improvement project through stl co please waive permit fee if applicable. we are installing a 80% 60, 000 btu furnace and a 25 flue liner
Valuation:
$2,485
Permit #:
21MEC-03825
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Installation of 96% eff 60, 000 btu furnace and 2.5 ton evaporator coil
Valuation:
$4,575
Permit #:
23MEC-00357
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Total installation of a 2.5 ton condensing unit evaporator coil and a 80% 80, 000 btu furnace
Valuation:
$9,500
Permit #:
22MEC-07929
Status:
complete
Fee:
$126
Permit Type:
Replacement
Building Type:
N/A
Installation of a 3.5 ton condensing unit and evaporator coil
Valuation:
$6,315
Permit #:
25MEC-06631
Status:
filed
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Install 2.5 ton 14 seer condensing unit and uncased evaporator coil
Valuation:
$4,850
Permit #:
23MEC-00537
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
3.5 ton 16 seer ruude condensing unit evaporator coil & 80% efficient 100, 000 btu 2 ton 16 seer ruude condensing unit evaporator coil & 80% efficient 50, 000 btu
Valuation:
$15,785
Permit #:
20MEC-07824
Status:
complete
Fee:
$158
Permit Type:
Replacement
Building Type:
N/A
Install (1) 13 seer goodman 2 ton air conditioning unit outside on pad install (1) 2 ton a-coil on top of furnace
Valuation:
$6,105
Permit #:
21MEC-05372
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Install (1) goodman 3 ton air handler with evap coil and 15 kw electric heat kit
Valuation:
$3,475
Permit #:
22MEC-00048
Status:
complete
Fee:
$126
Permit Type:
Replacement
Building Type:
N/A
Red lobster-installation of (1) 5 ton york remote terminal unit
Valuation:
$13,935
Permit #:
24MEC-07488
Status:
filed
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Total installation of 3 ton 13 seer condensing unit and evaporator coil
Valuation:
$4,450
Permit #:
22MEC-09138
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Installation of ruude high efficient 3 ton 16 seer condensing unit & evaporator coil install a 96% high efficent ruude 85, 000 btu furnace
Valuation:
$7,500
Permit #:
20MEC-06802
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
Similar Contractors See more
119
BZ Score
$8K
Avg Project
-
Projects
122
BZ Score
$4.5K
Avg Project
-
Projects
License #
Saint Louis, MO
119
BZ Score
$7K
Avg Project
-
Projects
Mechanical Services Group Reviews
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Verified License
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Mechanical Services Group License info
Verified License
| License # | X3275 |
| Status | Active |
| County | St Louis County |
| Type | Hvac Service Ins |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Mechanical Services Group at the Saint Louis County Department of Public Works.
This is a sample of licensing data; click here to access a complete history.
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.
License Not Required
| Status | Not Required |
- BuildZoom verified in May, 2020 that this contractor does not need a license to be a contractor in Missouri.
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.
101
BuildZoom Score
128
Permits
- Building permit records show that Mechanical Services Group has worked on 128 permitted projects.
Mechanical Services Group Employees
CH
Casey Heinhold
CH
Casey Heinold