Updated: Apr 25, 2026
Location and Projects
Address
3668 CASTRO VALLEY BLVD, Castro Valley, CA, 94546
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Alligator Plumbing
Alligator Plumbing, 3668 Castro Valley Blvd, Castro Valley, CA (Owned by: Stephen Henry Cosbey) holds a Plumbing license and 1 other license according to the California license board.
Their BuildZoom score of 104 ranks in the top 9% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Alligator Plumbing, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Alligator Plumbing Services
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Alligator Plumbing Contact Information
Phone Number: (415) 298-8624
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Address: 3668 CASTRO VALLEY BLVD, Castro Valley, CA 94546
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Alligator Plumbing Castro Valley
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Alligator Plumbing has a BuildZoom score of 104, which places them above 91% of 336,931 contractors in California.
Activity
|
9 projects
|
2025 |
|
2 projects
|
2024 |
|
7 projects
|
2023 |
Our building permit records indicate that Alligator Plumbing has worked on at least
18.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
18 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Alligator Plumbing mostly works on
plumbing project
projects.
Pricing
|
8 projects
|
< $5k |
|
5 projects
|
$5k-$20k |
The typical size of their permits is approximately $3,970. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Dedicated gas line from gas meter to location of future cooktop and bbq. line to run surface mounted through garage and through ceiling of home. **permit is only for running gas line** -lvisperas
Valuation:
N/A
Permit #:
BIPL22-002450
Status:
final
Fee:
$153
Permit Type:
N/A
Building Type:
N/A
Dedicated 1” gas line from meter to existing location of kitchen cooktop. new gas cooktop to be installed. line to tee off at gas meter penetrate into garage run surface mounted through garage to penetrate into ceiling between 1st and 2nd floor. line to run through ceiling into kitchen and penetrate through wall to the exterior of the back of home where line will run surface mounted a... see more
Valuation:
$3,326
Permit #:
BIPL21-012601
Status:
final
Fee:
$143
Permit Type:
N/A
Building Type:
N/A
Dedicated 1” gas line from meter to existing location of kitchen cooktop. new gas cooktop to be installed. line to tee off at gas meter penetrate into garage run surface mounted through garage to penetrate into ceiling between 1st and 2nd floor. line to run through ceiling into kitchen and penetrate through wall to the exterior of the back of home where line will run surface mounted a... see more
Valuation:
$3,326
Permit #:
BISUB21-01302
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New 1-1/4 dedicated gas line from meter to fire pit location. steel under home polyethylene underground inside conduit. seismic shut off at meter
Valuation:
$6,745
Permit #:
B24-2256
Status:
issued
Fee:
$126
Permit Type:
N/A
Building Type:
N/A
Addition dedicated gas line from meter to new cooktop. new seismic shut off valve at gas meter 1 inch line 75k btu/s 98'.total ft galvanized
Valuation:
$3,970
Permit #:
B23-0428
Status:
final
Fee:
$121
Permit Type:
N/A
Building Type:
N/A
Replace existing water heater - residential at same location. 1st water heater capacity: 30 ga
Valuation:
$2,860
Permit #:
BLD2025-03721
Status:
final
Fee:
$0
Permit Type:
Water heater resi...
Building Type:
N/A
Replace existing water heater - residential at same location. 1st water heater capacity: 50 ga
Valuation:
$4,070
Permit #:
BLD2025-03695
Status:
final
Fee:
$0
Permit Type:
Water heater resi...
Building Type:
N/A
Replace existing water heater - residential at same location. 1st water heater capacity: 65 ga
Valuation:
$7,655
Permit #:
BLD2025-03655
Status:
final
Fee:
$0
Permit Type:
Water heater resi...
Building Type:
N/A
Replace existing water heater - residential at same location. 1st water heater capacity: 50 ga
Valuation:
$3,285
Permit #:
BLD2025-02943
Status:
final
Fee:
$0
Permit Type:
Water heater resi...
Building Type:
N/A
Replace existing water heater - residential at same location. 1st water heater capacity: 50 ga
Valuation:
$3,410
Permit #:
BLD2025-01987
Status:
final
Fee:
N/A
Permit Type:
Water heater resi...
Building Type:
N/A
Like for like 40 gallon natural gas atmospheric vented water heater replacement
Valuation:
N/A
Permit #:
BL-WH-2023-00114
Status:
complete
Fee:
$239
Permit Type:
N/A
Building Type:
N/A
New dedicated gas line from meter to stove 1 line 90 total ft 84k btu line to be hard piped 40’ across exterior to drop into crawl space and run 50’ track pipe. hard pipe riser to recessed box behind stove
Valuation:
$2,390
Permit #:
B20-2915
Status:
final
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Dedicated gas line from meter to stove - running 40 of csst under crawl space 3/4 and 78k btu's
Valuation:
$2,660
Permit #:
B22-2492
Status:
final
Fee:
$116
Permit Type:
N/A
Building Type:
N/A
Full copper repipe under home and in walls. no water main
Valuation:
N/A
Permit #:
BL-PLUMR-2023-00057
Status:
complete
Fee:
$331
Permit Type:
N/A
Building Type:
N/A
Like for like 40 gallon = natural gas atmospheric vented water heater located in garage on a platform
Valuation:
N/A
Permit #:
BL-WH-2023-00306
Status:
complete
Fee:
$239
Permit Type:
N/A
Building Type:
N/A
Like for like 50 gallon natural gas atmospheric vented water heater located in garage
Valuation:
N/A
Permit #:
BL-WH-2023-00372
Status:
issued
Fee:
$239
Permit Type:
N/A
Building Type:
N/A
75 gallon natural gas atmospheric vented water heater like for like in garage
Valuation:
$6,450
Permit #:
BIPL23-012039
Status:
final
Fee:
$158
Permit Type:
N/A
Building Type:
N/A
Replace water heater in basement - 50 gal -- install auto gas shutoff valve
Valuation:
$3,700
Permit #:
BRPLUMB-23-0171
Status:
final
Fee:
$363
Permit Type:
Water heater
Building Type:
N/A
Work category: 2pb; install city mandated backflfow valve in 4 sewer line
Valuation:
N/A
Permit #:
PW20211111435
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 2pb; new bathroom in 1st level move laundry facilities re-plumbing existing water and waste on 2nd level. new water main. new gas
Valuation:
N/A
Permit #:
PW20181119174
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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BZ Score
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Avg Project
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BZ Score
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Avg Project
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Projects
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BZ Score
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Avg Project
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Projects
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Verified License
BuildZoom confirmed this contractor's license
Alligator Plumbing License info
Verified License
| License # | 995431 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Alligator Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 717035 |
| Status | Inactive |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- According to the California Contractors State 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.
Check this license's status for Alligator Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
Bonded
| Bonded Agent | Suretec Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Falls Lake Fire & Casualty Company |
130
Permits
- Building permit records show that Alligator Plumbing has worked on 130 permitted projects.
Alligator Plumbing Employees
JD
Jason Benton Debonis
Owner
SC
Stephen Henry Cosbey
Owner