Updated: May 26, 2026
Location and Projects
Address
13745 CYNTHIA LN, Peotone, IL, 60468
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Mercury Masters HVAC/Mechanical Contractor
Mercury Masters LLC, (Owned by: John Magruder) holds a Sub Contractor, Hvac license and 5 other licenses according to the Dupage County license board.
Their BuildZoom score of 90 indicates that they are licensed or registered but we do not have additional information about them.
Their license was verified as active when we last checked. If you are thinking of hiring Mercury Masters LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Mercury Masters LLC Contact Information
Phone Number: (708) 269-7980
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Address: 13745 CYNTHIA LNIL 60468
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Fire and water damage repairs interior alterations to one story masonry single family residence including plumbing hvac and electrical. all work per plans to correct building code violations.**certified corrections- - subject to field inspections & audit **
Valuation:
$80,000
Permit #:
100874195
Status:
complete
Fee:
$1,354
Permit Type:
N/A
Building Type:
N/A
Oia 1638 w 38th pl interior alteration to a 2 du duplex 2nd & 3erd fl. install new mep equipment & fixtures remove & replace rear porch as per plans
Valuation:
$80,000
Permit #:
100813165
Status:
complete
Fee:
$3,377
Permit Type:
N/A
Building Type:
N/A
Interior/exterior renovation fire damage sfr: new mechanical electrical & plumbing upgrade. new rear wood porch
Valuation:
$75,000
Permit #:
100756876
Status:
complete
Fee:
$838
Permit Type:
N/A
Building Type:
N/A
Deconversion of existing 2du into single family residence. interior alterations to existing 3 story masonry building including plumbing hvac and electrical. new rear wood deck with new wood stairs from 2nd floor. no change to exist front windows. all work as per plans
Valuation:
$180,000
Permit #:
100795330
Status:
complete
Fee:
$2,433
Permit Type:
N/A
Building Type:
N/A
Interior remodeling to an existing 2 units class a-2 multiple dweling. **certified plan corrections project - conditional permit: subject to field inspections **
Valuation:
$30,000
Permit #:
100708133
Status:
complete
Fee:
$1,073
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Mercury Masters LLC License info
Verified License
| License # | CR0005335 |
| Status | Active |
| County | Dupage County |
| Type | Sub Contractor, Hvac |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Mercury Masters LLC at the County of Dupage Contractor Registration Information.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CR-10246 |
| Status | Inactive |
| Type | Contractor Registration |
- According to the local license board, 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
| License # | R10013 |
| Status | Inactive |
| County | Dupage County |
| Type | Sub Contractor, Hvac |
- According to the County of Dupage Contractor Registration Information, 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 Mercury Masters LLC at the County of Dupage Contractor Registration Information.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-678 |
| Status | Inactive |
| Town | Bartlett |
| Type | {U'license Type': U'hvac'} |
- According to the Contractors Licensed in Bartlett, 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 Mercury Masters LLC at the Contractors Licensed in Bartlett.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | L-2018-146 |
| Status | Inactive |
| County | Kankakee County |
| Type | Contractor Registration |
- According to the Kankakee County Planning Department, 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 Mercury Masters LLC at the Kankakee County Planning Department.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| County | Cook County |
| Type | Hvac |
- According to the Cook County Department of Building and Zoning, 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.
90
BuildZoom Score
Mercury Masters LLC Employees
JM
John Magruder
Owner
ML
Mercury Masters, Llc.
Licensee