Updated: Apr 11, 2026
Location and Projects
Address
1824 ROCKFORD AVE, Modesto, CA, 95355
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Duffy Plumbing
Duffy Plumbing at 1824 ROCKFORD AVE, Modesto, CA 95355, held a Plumber license (#698724) with the California contractors license board with an expiration date of 11-30-2026. We last verified the license was inactive on 04-10-2026.
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.
Duffy Plumbing Services
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Duffy Plumbing Contact Information
Phone Number: (209) 525-8535
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Address: 1824 ROCKFORD AVE, Modesto, CA 95355
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace old galvanized water line. new 1-1/4 schedule 80 pvc water line installed from water meter to the house. line is installed and working. trench depth is 18 inches with a base of sand. trench is open and ready for inspection. any questions please call me. michael duffy 415-602-7815. duffy plumbing
Valuation:
$5,000
Permit #:
B28252
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
New gas line for gas/electric emergency generator
Valuation:
N/A
Permit #:
P2019-0101
Status:
issued
Fee:
$152
Permit Type:
Residential
Building Type:
N/A
Residential water heater
Valuation:
N/A
Permit #:
20201034
Status:
final
Fee:
$129
Permit Type:
N/A
Building Type:
N/A
(n) gas line for emergency generator
Valuation:
N/A
Permit #:
P2019-0097
Status:
issued
Fee:
$152
Permit Type:
Residential
Building Type:
N/A
Remove and cap off two w.c two floor drains 1 tub 1 lav install 2 new shower drains & valves two new kitchen drains and replumbing (e) water supplies
Valuation:
$0
Permit #:
PP20100727723
Status:
COMPLETED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove and cap off two w.c two floor drains 1 tub 1 lav install 2 new shower drains & valves two new kitchen drains and replumbing (e) water supplies
Valuation:
N/A
Permit #:
PP20100727723
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New water service new gas service remodel 2 bathrooms t include 2 lavs 2 toilets 1 tub 1 shower kitchen sink and dishwasher new rain leaders
Valuation:
N/A
Permit #:
417633
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Rerough gas line for stove in kitchen rerough kitchen drain and water lines - amendment to permit no. 345478 additional permit fee - water and gas
Valuation:
N/A
Permit #:
346721
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Amendment to permit #391223 - additions/remodel to include 1-1/2 baths kitchen deck and roof drains laundry service new water heater
Valuation:
N/A
Permit #:
413816
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
R&r 12 of 1 1/4 leaking pipe
Valuation:
N/A
Permit #:
PL11-0155
Status:
final
Fee:
$283
Permit Type:
Commercial new
Building Type:
N/A
3 lavs one shower one tub shower 2 toilets (trim only) 1 water heater 1 gas cooktop one furnace hook up (trtim bathroom & kitchen)
Valuation:
N/A
Permit #:
455081
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
2 new gas lines (each unit) 2 new kitchens 2 water closts 3 lavs 2 tub showers 2 new water heaters new water service
Valuation:
N/A
Permit #:
469888
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Change address to 1936 buchanan - permit #345230 replace existing tub and shower valve. replace existing lavatory
Valuation:
N/A
Permit #:
345478
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remodel kitchen remodel 1/2 bathroom master bathroom and provide new gas service replace water heater with 2 new 50 gal
Valuation:
N/A
Permit #:
429153
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Additions/remodel to include 1 1/2 baths kitchen deck and roof drains laundry service new water heater
Valuation:
N/A
Permit #:
391223
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 1 water closet shower and pedestal lavatory including new waste lines for all and new copper lines
Valuation:
N/A
Permit #:
327248
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Backwater valve subsoil rainwater three additional inspections amendment to permit no. 434280
Valuation:
N/A
Permit #:
444662
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install two shower bodies (valves) install two shower drains move lavatory move water heater
Valuation:
N/A
Permit #:
367416
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Reminder upstairs bathroom rebuild exterior start and waste toilet 1 lav 1 tub and shower
Valuation:
N/A
Permit #:
431504
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New laundry service 2 new bathrooms to include 2 toilets 2 lavs 1 tub shower
Valuation:
N/A
Permit #:
434280
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Duffy Plumbing License info
Inactive License
| License # | 698724 |
| 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 Duffy Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
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- *No active license on file. If you are Duffy Plumbing, click “This is My Business” to update your information.
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
26
Permits
- Building permit records show that Duffy Plumbing has worked on 26 permitted projects.
Duffy Plumbing Employees
MD
Michael John Duffy
Owner
Duffy replaced a water heater in a rental unit I own while I was out of the state and unable to supervise. He responded to an emergency quickly. Duffy purchased and installed the new water heater (making what I ascertained after the fact was the best decision for what replacement heater to purchase) made the repair very efficiently and for a very reasonable price. The job could simply not have been done better. I would not hesitate to use Duffy again.