Updated: May 28, 2026
Location and Projects
Address
228 EAST GREYSTONE AVENUE, Monrovia, CA, 91016
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Carl Maertens Construction
Carl Maertens, 228 E Greystone Ave, Monrovia, CA (Owned by: Carl Jan Maertens) holds a General Building, Plumbing license according to the California license board.
Their BuildZoom score of 92 ranks in the top 32% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Carl Maertens, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Carl Maertens Services
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Carl Maertens Contact Information
Phone Number: (626) 357-4664
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Address: 228 EAST GREYSTONE AVENUE, Monrovia, CA 91016
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This is a sample of this contractor's permits. Click here to access their complete permit history.
(eplan) residential addition to convert existing porch to bedroom & bathroom w door removal & (4) windows
Valuation:
N/A
Permit #:
00911139-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(e-plan) retaining wall & water feature (less than 18') pre-july supplement
Valuation:
N/A
Permit #:
00846035-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Gas line for bbq island
Valuation:
N/A
Permit #:
16042-90000-11974
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
16042-90000-11974
Status:
final
Fee:
N/A
Permit Type:
1 or 2 Family Dwe...
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Carl Maertens License info
Verified License
| License # | 601255 |
| Status | Active |
| State | California |
| Type | General Building, Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Carl Maertens at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Carl Maertens Employees
CM
Carl Jan Maertens
Owner