Updated: Jun 26, 2026
Location and Projects
Address
645 CLIFDEN DRIVE, Saint Charles, MO, 63304
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Merkel Mechanical Services
Merkel Mechanical Services, 645 Clifden Dr, St. Charles, MO (Owned by: Stephen Merkel) holds a Mechanical license and 5 other licenses according to the St Louis County license board.
Their BuildZoom score of 96 ranks in the top 20% of 23,328 Missouri licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Merkel Mechanical Services, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Merkel Mechanical Services Contact Information
Phone Number: (314) 359-1359
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Address: 645 CLIFDEN DRIVE, St. Charles, MO 63304
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Merkel Mechanical Services St. Charles
Quality
96
80th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Merkel Mechanical Services has a BuildZoom score of 96, which places them above 80% of 23,328 contractors in Missouri.
Activity
|
1 project
|
2025 |
|
2 projects
|
2024 |
|
2 projects
|
2023 |
Our building permit records indicate that Merkel Mechanical Services has worked on at least
5.0 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
|
5 projects
|
Mechanical projects |
|
3 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Merkel Mechanical Services mostly works on
mechanical project
and hvac project
projects.
Pricing
|
1 project
|
< $5k |
|
4 projects
|
$5k-$20k |
The typical size of their permits is approximately $14,000. 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 Merkel Mechanical Services
This is a sample of this contractor's permits. Click here to access their complete permit history.
Building new single family home
Valuation:
$418,500
Permit #:
RBP22-000587
Status:
issued
Fee:
$4,598
Permit Type:
Residential build...
Building Type:
N/A
Stl sports clinic - install new rooftop unit to air condition the warehouse 25-bld-03091
Valuation:
$14,000
Permit #:
25MEC-05547
Status:
complete
Fee:
$260
Permit Type:
Replacement
Building Type:
N/A
(national council of the us society of st vincent de paul) relocate 3 supply diffusers and install 2 new supply diffusers
Valuation:
$1,500
Permit #:
24MEC-07263
Status:
issued
Fee:
$114
Permit Type:
Alteration
Building Type:
N/A
New home building
Valuation:
$270,000
Permit #:
RBP20-001382
Status:
complete
Fee:
$2,918
Permit Type:
Residential build...
Building Type:
N/A
Residential construction - new building
Valuation:
$390,000
Permit #:
RBP20-001377
Status:
complete
Fee:
$3,700
Permit Type:
Residential build...
Building Type:
N/A
****unable to process – please resubmit* we are unable to process your permit for the following reason(s): this scope of work requires a mechanical permit. please resubmit with the record type: mechanical commercial mechanical. please click on the link for more information: https://stlouiscountymo.gov/st-louis-county-departments/transportation-and-public-works/accela-aca-training (if ... see more
Valuation:
$18,000
Permit #:
23BLD-04737
Status:
canceled
Fee:
N/A
Permit Type:
Addition
Building Type:
N/A
(accelerated plan review) ( clarkson eyecare) install new roof top unit with full curb to condition warehouse area
Valuation:
$18,000
Permit #:
23MEC-06409
Status:
issued
Fee:
$770
Permit Type:
Other
Building Type:
N/A
Flood repair -electric service and outlet replacement replace air conditioning exterior wall damage septic affidavit and propane tie down refer to file 19-008187
Valuation:
$13,500
Permit #:
RBP20-001422
Status:
complete
Fee:
$39
Permit Type:
Residential build...
Building Type:
N/A
(accelerated plan review) (central autobody rebuilders) replace existing makeup air unit
Valuation:
$15,000
Permit #:
23MEC-10940
Status:
complete
Fee:
$760
Permit Type:
Replacement
Building Type:
N/A
Vent 1 make up air unit with intake to paint booth (lou fusz vip)
Valuation:
$17,500
Permit #:
21MEC-09978
Status:
complete
Fee:
$270
Permit Type:
Addition
Building Type:
N/A
(accelerated plan review) (coma coffee) install coffee roaster
Valuation:
$7,500
Permit #:
24MEC-00987
Status:
revisions requested
Fee:
N/A
Permit Type:
Addition
Building Type:
N/A
Misc mechanical alterations (dent wizard)
Valuation:
$23,000
Permit #:
21MEC-04047
Status:
complete
Fee:
$284
Permit Type:
Replacement
Building Type:
N/A
Relocation of paint booth: vip adi
Valuation:
$10,000
Permit #:
20MEC-08842
Status:
complete
Fee:
$260
Permit Type:
Alteration
Building Type:
N/A
Replace ceiling diffusers/move - guitar center - 17bld-06858
Valuation:
$1,200
Permit #:
18MEC-02036
Status:
complete
Fee:
$156
Permit Type:
Alteration
Building Type:
N/A
Replace roof top unit clarkson eyecare
Valuation:
$8,900
Permit #:
18MEC-09190
Status:
issued
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2018-00004799
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Apr-accelerated: paint booth ducting - dave sinclair body shop
Valuation:
$120,000
Permit #:
21MEC-10394
Status:
complete
Fee:
$1,425
Permit Type:
Replacement
Building Type:
N/A
Instal new remote terminal unit and duct system - steris corporation-stability chambers
Valuation:
$17,000
Permit #:
15MEC-05890
Status:
complete
Fee:
$261
Permit Type:
Alteration
Building Type:
N/A
Install dampers zone control bathroom fan farmers insurance bld17-05394
Valuation:
$2,000
Permit #:
17MEC-10557
Status:
complete
Fee:
$156
Permit Type:
Alteration
Building Type:
N/A
Replace 5 ton remote terminal unit for wash o mat
Valuation:
$5,800
Permit #:
17MEC-06020
Status:
complete
Fee:
$79
Permit Type:
Replacement
Building Type:
N/A
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BZ Score
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Avg Project
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BZ Score
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Merkel Mechanical Services Reviews
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Verified License
BuildZoom confirmed this contractor's license
Merkel Mechanical Services License info
Verified License
| License # | X0287 |
| Status | Active |
| County | St Louis County |
| Type | Mechanical |
| Date Issued | 12-31-2025 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Merkel Mechanical Services 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 Merkel Mechanical Services with 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 |
| City | Town And Country |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Merkel Mechanical Services with the City of Town and Country
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 | 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 B) |
- 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.
96
BuildZoom Score
51
Permits
- Building permit records show that Merkel Mechanical Services has worked on 51 permitted projects.
Merkel Mechanical Services Employees
SM
Stephen Merkel
Owner