Updated: Apr 27, 2026
Location and Projects
Address
1107 STANFORD DRIVE, Simi Valley, CA, 93065
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TETRA MECHANICAL SERVICES
TETRA MECHANICAL SERVICES, 1107 Stanford Dr, Simi Valley, CA (Owned by: Kent Michael Donnelly) holds a Refrigeration, Warm Air Heating, Ventilating And Air Conditioning license according to the California license board.
Their BuildZoom score of 96 ranks in the top 20% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring TETRA MECHANICAL SERVICES, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
TETRA MECHANICAL SERVICES Contact Information
Phone Number: (818) 940-4153
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Address: 1107 STANFORD DRIVE, Simi Valley, CA 93065
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Building Permits by TETRA MECHANICAL SERVICES
This is a sample of this contractor's permits. Click here to access their complete permit history.
(e-plan) 2-story addition to existing 2-story house. first floor family room addition adjacent to dining/living room. second floor master sitting room and balcony above family room
Valuation:
$250,000
Permit #:
BS2002095
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Single family res...
Reconnect two bathroom exhaust fans and fix duct
Valuation:
N/A
Permit #:
20044-30000-03029
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Replace existing air conditioning units
Valuation:
N/A
Permit #:
20044-90000-07069
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Change out fau and air conditioning unit -
Valuation:
N/A
Permit #:
19-20/000 000 MR 00
Status:
complete
Fee:
$108
Permit Type:
Mechanical work
Building Type:
Residential plann...
Witness test 4 smoke detectors
Valuation:
N/A
Permit #:
20044-90000-09702
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Install 4 smoke detectors
Valuation:
N/A
Permit #:
20044-90000-09622
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Install ductless mini split
Valuation:
N/A
Permit #:
20044-90000-07809
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Mechanical for duct relocation
Valuation:
N/A
Permit #:
BLD2018-04589
Status:
final
Fee:
N/A
Permit Type:
Tenant improvement
Building Type:
N/A
Change out fau and air conditioning unit - like for like
Valuation:
N/A
Permit #:
2019-20-MR-0-0-0
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Supplemental permit to #17044-30000-03924 for duct work alternations
Valuation:
N/A
Permit #:
17044-30001-03924
Status:
triage
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Supplemental permit to #17044-30000-03924 for duct work alterations
Valuation:
N/A
Permit #:
17044-30002-03924
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Mechanical r/r furance air conditioning condenser & coil (in same location). ***cheers: 418-a020101664a (cf1r to be on site)*** entered by: woom
Valuation:
N/A
Permit #:
M2019-001101
Status:
final
Fee:
$188
Permit Type:
N/A
Building Type:
N/A
Modify ducting
Valuation:
N/A
Permit #:
17044-30000-03924
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Mechanical for tenant improvement
Valuation:
$0
Permit #:
MEC2015-00432
Status:
Issued
Fee:
N/A
Permit Type:
Mechanical permit
Building Type:
N/A
Install type-2 hood over existing stockpot stove used for boiling water dipping for raw (dow) bagles.(no grease laden vapours are produced )
Valuation:
N/A
Permit #:
02044-20000-00128
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Install 10 ton hp into existing duct instal 2 r/a duct for seperate unit
Valuation:
N/A
Permit #:
12044-20000-03538
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
R/r air conditioning w disconnect entered by: woom
Valuation:
N/A
Permit #:
E2019-001103
Status:
final
Fee:
$83
Permit Type:
N/A
Building Type:
N/A
Bathroom exhaust
Valuation:
N/A
Permit #:
20044-90000-09951
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
1-split system 9-in/out lets 2-bath fans
Valuation:
N/A
Permit #:
M20-0152
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
16-4127/000 000 MR 00
Status:
issued
Fee:
$59
Permit Type:
Mechanical work
Building Type:
One family reside...
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TETRA MECHANICAL SERVICES Reviews
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Verified License
BuildZoom confirmed this contractor's license
TETRA MECHANICAL SERVICES License info
Verified License
| License # | 273330 |
| Status | Active |
| State | California |
| Type | Refrigeration, Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for TETRA MECHANICAL SERVICES at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Hartford Underwriters Insurance Company |
25
Permits
- Building permit records show that TETRA MECHANICAL SERVICES has worked on 25 permitted projects.
TETRA MECHANICAL SERVICES Employees
KD
Kent Michael Donnelly
Owner
MD
Michael P Donnelly
Sole Owner