Updated: Jun 01, 2026
Location and Projects
Address
608 WEST MONTECITO AVE, Sierra Madre, CA, 91024
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A D Security Low Voltage Contractor
A D Security Inc, 608 W Montecito Ave, Sierra Madre, CA (Employees: Adam David Stelzer and Carolyn Sue Stelzer) holds a Low Voltage Systems license according to the California license board.
Their BuildZoom score of 95 ranks in the top 22% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring A D Security Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
A D Security Inc Services
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A D Security Inc Contact Information
Phone Number: (626) 255-1562
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Address: 608 WEST MONTECITO AVE, Sierra Madre, CA 91024
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Install electromanetically locked egress doors on floor 6-22 and two stairwells. including stairwell on 6 floor of (e) 22- story above grade 151 residential apartment units high -rise building (type 1a construction)
Valuation:
$50,000
Permit #:
20016-10000-02841
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Common area low-voltage network wiring and terminations
Valuation:
N/A
Permit #:
22041-30000-63735
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Low voltage/network and camera install
Valuation:
N/A
Permit #:
22041-20000-37226
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Install low voltage wiring on 1 floor
Valuation:
N/A
Permit #:
14041-20000-25796
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Low voltage wiring for door locks and audio communication
Valuation:
N/A
Permit #:
19041-10000-25217
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Fire monitor system (vons #59)
Valuation:
$1,000
Permit #:
A92-002-786
Status:
final
Fee:
$89
Permit Type:
N/A
Building Type:
N/A
Central station fire alarm
Valuation:
$1,700
Permit #:
A93-000-505
Status:
Final
Fee:
$114
Permit Type:
N/A
Building Type:
N/A
Fire alarm system
Valuation:
N/A
Permit #:
B96-000-605
Status:
issued
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
14041-20000-25796
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
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A D Security Inc License info
Verified License
| License # | 974487 |
| Status | Active |
| State | California |
| Type | Low Voltage Systems |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for A D Security Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
95
BuildZoom Score
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Twin City Fire Insurance Company |
7
Permits
- Building permit records show that A D Security Inc has worked on 7 permitted projects.
A D Security Inc Employees
AS
Adam David Stelzer
Rmo
CS
Carolyn Sue Stelzer
Officer