Updated: May 26, 2026
Location and Projects
Address
4847 ISABELL COURT, Golden, CO, 80403
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Bulldog Security and Construction Inc
Bulldog Security and Construction Inc, 4847 Isabell Ct, Golden, CO (Owned by: Randy Rengstorf) holds a Fire Alarm Systems Contractor license and 14 other licenses according to the Aurora license board.
Their BuildZoom score of 96 ranks in the top 20% of 55,949 Colorado licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Bulldog Security and Construction Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Bulldog Security and Construction Inc Services
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Bulldog Security and Construction Inc Contact Information
Phone Number: (303) 910-2341
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Address: 4847 ISABELL COURT, Golden, CO 80403
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Building Permits by Bulldog Security and Construction Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Sam's club - fire alarm - replace the existing fire alarm control unit and install new horn/strobe to new shop in produce cooler. 2 devices
Valuation:
$16,300
Permit #:
1350155
Status:
issued
Fee:
$157
Permit Type:
Fire alarm permit
Building Type:
N/A
Commercial fire alarm system
Valuation:
N/A
Permit #:
BP-21-00453
Status:
complete
Fee:
$159
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
22116789 00000EP
Status:
issued
Fee:
N/A
Permit Type:
New construction
Building Type:
Commercial
003r electrical other low voltage 2500
Valuation:
N/A
Permit #:
2107076
Status:
issued
Fee:
N/A
Permit Type:
003r electrical o...
Building Type:
N/A
Walmart remodel - fire alarm keypad/panel upgrade
Valuation:
N/A
Permit #:
FIRE19-0395
Status:
final
Fee:
$431
Permit Type:
Fire alarm
Building Type:
N/A
008 misc. fee application fees $ 95 building d cntr-single tr $ 130
Valuation:
N/A
Permit #:
2102628
Status:
issued
Fee:
N/A
Permit Type:
008 misc. Fee
Building Type:
N/A
Lowes fa modifications for dry system upgrade
Valuation:
N/A
Permit #:
FA23-0017
Status:
final
Fee:
$423
Permit Type:
Nfpa 72 remodel
Building Type:
N/A
Fa sams club
Valuation:
N/A
Permit #:
B202101718
Status:
complete
Fee:
$200
Permit Type:
N/A
Building Type:
N/A
Access control: installation of card access to a tenant spa
Valuation:
$4,000
Permit #:
13-0327
Status:
final
Fee:
$268
Permit Type:
Building
Building Type:
N/A
Fire alarm - 7155 sheridan blvd - walmart store 3824 vision
Valuation:
$2,000
Permit #:
15-6201
Status:
final
Fee:
$136
Permit Type:
Fire alarm
Building Type:
N/A
Adding (4) dry system fire alarm switches
Valuation:
N/A
Permit #:
FA22-0079
Status:
final
Fee:
$296
Permit Type:
Nfpa 72 remodel
Building Type:
N/A
Fire alarm - wallmart market place - new
Valuation:
$19,500
Permit #:
14-5282
Status:
final
Fee:
$827
Permit Type:
Fire alarm
Building Type:
N/A
Fa walmart
Valuation:
N/A
Permit #:
B201905719
Status:
complete
Fee:
$200
Permit Type:
N/A
Building Type:
N/A
Walmart neighborhood market - new fire alarm system
Valuation:
$9,000
Permit #:
936654
Status:
N/A
Fee:
$200
Permit Type:
Limited
Building Type:
N/A
Sam's club at southlands - facp & notification device replacement
Valuation:
$23,300
Permit #:
865239
Status:
N/A
Fee:
$91
Permit Type:
Limited
Building Type:
N/A
New fire alarm
Valuation:
N/A
Permit #:
FA16-0112
Status:
canceled
Fee:
N/A
Permit Type:
Nfpa 72 vesda
Building Type:
N/A
Wal-mart neighborhood market - upgrade fire alarm system
Valuation:
$8,000
Permit #:
729213
Status:
N/A
Fee:
$165
Permit Type:
Limited
Building Type:
N/A
Walmart; adding notification in classrooms-existing fire alarm modification for tenant improvement
Valuation:
$5,800
Permit #:
1128724
Status:
issued
Fee:
$173
Permit Type:
Fire alarm permit
Building Type:
N/A
Fire alarm - jo ann's fabrics - new
Valuation:
$7,250
Permit #:
14-1582
Status:
final
Fee:
$355
Permit Type:
Fire alarm
Building Type:
N/A
Walmart fire alarm limited remodel
Valuation:
N/A
Permit #:
FIRE18-0158
Status:
final
Fee:
$1,431
Permit Type:
Fire alarm
Building Type:
N/A
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Bulldog Security and Construction Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Bulldog Security and Construction Inc License info
Verified License
| Status | Active |
| City | Aurora |
| Type | Fire Alarm Systems Contractor |
| Business Type | Foreign Corporation |
- BuildZoom verified this license was active as of May 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | AEC2859 |
| Status | Active |
| Town | Parker |
| Type | Contractor |
| Business Type | Foreign Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Bulldog Security and Construction Inc at the The Town of Parker, Colorado.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | LIC-0007555 |
| Status | Active |
| City | Boulder |
| Type | Fire |
| Class | Class C Fire Alarm Systems |
| Business Type | Foreign Corporation |
- When BuildZoom last verified this license, it had an expiration date of December, 2018. Check the current license status of Bulldog Security and Construction Inc with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 2859 |
| Status | Active |
| Town | Parker |
| Type | Contractor, Fire Alarm |
| Business Type | Foreign Corporation |
- When BuildZoom last verified this license, it had an expiration date of April, 2017. Check the current license status of Bulldog Security and Construction Inc with the The Town of Parker, Colorado
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 26678 |
| Status | Active |
| City | Thornton |
| Type | Fire |
| Business Type | Foreign Corporation |
- When BuildZoom last verified this license, it had an expiration date of April, 2017. Check the current license status of Bulldog Security and Construction Inc with the Thornton City Development Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 0007555 |
| Status | Active |
| City | Boulder |
| Type | Fire Class C Fire Alarm Systems |
| Business Type | Foreign Corporation |
- When BuildZoom last verified this license, it had an expiration date of December, 2014. Check the current license status of Bulldog Security and Construction Inc with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | AS-1839 |
| Status | Active |
| Type | Sub Contractor |
| Business Type | Foreign Corporation |
- When BuildZoom last verified this license, it had an expiration date of April, 2017.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 16-1884 |
| Status | Inactive |
| Town | Castle Rock |
| Type | Single Trade |
| Business Type | Foreign Corporation |
- According to the Castle Rock Town, Colorado, 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 Bulldog Security and Construction Inc at the Castle Rock Town, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AS-1839 |
| Status | Inactive |
| City | Fort Collins |
| Type | Sub Contractor |
| Business Type | Foreign Corporation |
- According to the City of Fort Collins, 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 Bulldog Security and Construction Inc at the City of Fort Collins.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | D08004 |
| Status | Inactive |
| City | Littleton |
| Type | Contractor |
| Business Type | Foreign Corporation |
- According to the The City of Littleton, CO, 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 Bulldog Security and Construction Inc at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LIC-0007555-FIREALM |
| Status | Inactive |
| City | Boulder |
| Type | Fire |
| Class | Class C Fire Alarm Systems |
| Business Type | Foreign Corporation |
- According to the Boulder Licensing 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.
Check this license's status for Bulldog Security and Construction Inc at the Boulder Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 0014823 |
| Status | Inactive |
| Pueblo | |
| Type | Low Voltage |
| Business Type | Foreign Corporation |
- According to the Pueblo regional Building 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 Bulldog Security and Construction Inc at the Pueblo regional Building Department.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 060331040 |
| Status | Inactive |
| City | Westminster |
| Type | General Contractor |
| Business Type | Foreign Corporation |
- According to the City of Westminster, Colorado, 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 Bulldog Security and Construction Inc at the City of Westminster, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LCC2015058976 |
| Status | Inactive |
| City | Thornton |
| Type | Class D Fire Systems |
| Business Type | Foreign Corporation |
- According to the Thornton City Development Contractor License, 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 Bulldog Security and Construction Inc at the Thornton City Development Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | TS01804 |
| Status | Inactive |
| State | Minnesota |
| Type | Technology Systems Contractor |
| Business Type | Foreign Corporation |
- According to the Minnesota Department of Labor & Industry, 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 Bulldog Security and Construction Inc at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Insured
| Insurer | Scottsdale Insurance Co, Pinnacol Assurance |
Insured
| Workers Comp Provider | Pinnacol |
50
Permits
- Building permit records show that Bulldog Security and Construction Inc has worked on 50 permitted projects.
Bulldog Security and Construction Inc Employees
BS
Bulldog Security
Owner
NR
Nick L. Rengstorf
RR
Randy Rengstorf
Owner