Updated: Jun 05, 2026
Location and Projects
Address
P O BOX 6065, Fremont, CA, 94538
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Mainstream Plumbing and Heating Co
Mainstream Plumbing and Heating Co at P O BOX 6065, Fremont, CA 94538, held a HVAC/Mechanical Contractor license (#706854) with the California contractors license board with an expiration date of 01-31-1996. We last verified the license was inactive on 06-04-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
Mainstream Plumbing and Heating Co Services
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Mainstream Plumbing and Heating Co Contact Information
Phone Number: (510) 793-5422
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Address: P O BOX 6065, Fremont, CA 94538
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Building Permits by Mainstream Plumbing and Heating Co
This is a sample of this contractor's permits. Click here to access their complete permit history.
Service changeout
Valuation:
N/A
Permit #:
14-1352
Status:
final
Fee:
$91
Permit Type:
Service upgrade
Building Type:
N/A
Scope of work to include: repipe of kitchen and 2 bathrooms
Valuation:
N/A
Permit #:
2009 021111 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Repair main gas line to apartment building
Valuation:
N/A
Permit #:
BLD1997-04112
Status:
CLOSED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installing screws in vent of water heater.
Valuation:
$0
Permit #:
BI-2007-2489
Status:
final
Fee:
$75
Permit Type:
N/A
Building Type:
N/A
Install water line from meter to house
Valuation:
$125
Permit #:
P95-5440
Status:
final
Fee:
$86
Permit Type:
N/A
Building Type:
N/A
Replace existing water pipes
Valuation:
$3,000
Permit #:
P050057
Status:
final
Fee:
$89
Permit Type:
Asfr
Building Type:
N/A
Re-pipe copper
Valuation:
N/A
Permit #:
07-1013
Status:
final
Fee:
$48
Permit Type:
N/A
Building Type:
N/A
Water service change out from city service to single family residence
Valuation:
N/A
Permit #:
2004 127741 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
BLD2006-02168
Status:
final
Fee:
$180
Permit Type:
N/A
Building Type:
N/A
40 showers for building b
Valuation:
N/A
Permit #:
P98-000184
Status:
final
Fee:
$305
Permit Type:
N/A
Building Type:
N/A
42 showers for building a
Valuation:
N/A
Permit #:
P98-000183
Status:
final
Fee:
$319
Permit Type:
N/A
Building Type:
N/A
Permit value$3k replace existing water pipes
Valuation:
N/A
Permit #:
P050057
Status:
FINALED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
To remove o/o section of 2 drain i and relace with new
Valuation:
$0
Permit #:
P9003390
Status:
Expired
Fee:
$63
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
00-0752
Status:
final
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Type h/ac. alteration to 4 systems/and a bathroom vent
Valuation:
N/A
Permit #:
6618
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair portion of fresh water line beneath driveway
Valuation:
N/A
Permit #:
BLD2007-01999
Status:
FINALED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
To vent existing water heaters to install furnace
Valuation:
$0
Permit #:
M9001407
Status:
Expired
Fee:
$66
Permit Type:
N/A
Building Type:
N/A
Reroute approx 10 from meter
Valuation:
$0
Permit #:
P9001304
Status:
Final
Fee:
$61
Permit Type:
N/A
Building Type:
N/A
Replace @ 125 of gas line
Valuation:
N/A
Permit #:
425878
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Refoundation move repair
Valuation:
N/A
Permit #:
P9001173
Status:
FINAL
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Mainstream Plumbing and Heating Co Reviews
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Mainstream Plumbing and Heating Co License info
Inactive License
| License # | 706854 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, Plumbing |
| Business Type | Partnership |
- 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 Mainstream Plumbing and Heating Co at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 634194 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, Plumbing |
| Business Type | Partnership |
- 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 Mainstream Plumbing and Heating Co at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 733875 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, Plumbing |
| Business Type | Partnership |
- 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 Mainstream Plumbing and Heating Co at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
- How the BuildZoom Score works
- *No active license on file. If you are Mainstream Plumbing and Heating Co, click “This is My Business” to update your information.
Bonded
| Bonded Agent | Rli Insurance Company |
| Bond Value | $12,500 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
25
Permits
- Building permit records show that Mainstream Plumbing and Heating Co has worked on 25 permitted projects.
Mainstream Plumbing and Heating Co Employees
JK
Jerry Richard Krebs
Qualify Partner
ST
Samuel Testa
General Partner
ST
Samuel Testa
Sole Owner