Updated: Mar 20, 2026
Location and Projects
Address
1501 PALOU AVE, San Francisco, CA, 94124
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CIW& Sons Plumbing
CIW& Sons Plumbing, 1501 Palou Ave, San Francisco, CA (Employees: Demetrius Marlow Williams and Demonya Markeshabern Williams) holds a Plumbing license according to the California license board.
Their BuildZoom score of 105 ranks in the top 8% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring CIW& Sons Plumbing, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
CIW& Sons Plumbing Services
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CIW& Sons Plumbing Contact Information
Phone Number: (415) 829-2230
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Address: 1501 PALOU AVE, San Francisco, CA 94124
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Work category: 2pb; adding a new 4 area drain to existing 4 main and installing 2 perforated pipe along retaining wall
Valuation:
N/A
Permit #:
PW20250226378
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 2pa; install a floor drain hot water heater and a sink
Valuation:
N/A
Permit #:
PW20250409410
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1p; replace waste and overflow replace angle stops capped off leak snake waistline replaced toilet
Valuation:
N/A
Permit #:
PW20251023067
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 2pa; rough-in installation ada bathroom
Valuation:
N/A
Permit #:
PW20250411466
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Trim (3) bathroom on 1st fl trim kitchen on 1st fl install backflow preventer & condensate drain on 1st fl common area
Valuation:
N/A
Permit #:
PP20220112467
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
To correct address in ref to pw20250226378. correct from 142 cole to 149 cole
Valuation:
N/A
Permit #:
PP20251001018
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Gas line pressure test
Valuation:
N/A
Permit #:
PP20250423833
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1p; rough plumbing for washing machine and a kitchen gas stove and gas line dryer
Valuation:
N/A
Permit #:
PW20210208505
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replumbing existing plumbing fixtures replumbing water and waste and hot water heater
Valuation:
N/A
Permit #:
PP20190327416
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Finish work setting trim 3 compartment sink set grease trap food prep sink & hand wash sink connect gas to dem
Valuation:
N/A
Permit #:
PP20180427940
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Street replacing sewer truck and house trap to the sewer main line
Valuation:
N/A
Permit #:
PP20190207947
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installing 300 of 1 copper for compressed air & 200 of blackpipe for transmission/oil
Valuation:
N/A
Permit #:
PP20180522610
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remodel (1) bathroom install (1) mop sink
Valuation:
N/A
Permit #:
PP20171130750
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 1 underground gas line
Valuation:
N/A
Permit #:
PP20180820106
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install (2) water heaters
Valuation:
N/A
Permit #:
PP20180319802
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install water heater
Valuation:
N/A
Permit #:
PP20180319801
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Finishing to the bare framing members of the upper level of house. install insulation sheetrock and paint. install in kind plumbing fixtures and electrical wiring
Valuation:
$2,000
Permit #:
202006128491
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Renewal of pp20190923621: replacement of toilet; bathroom fixtures and kitchen fixtures
Valuation:
N/A
Permit #:
PP20210702673
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair gas line for wall heater
Valuation:
N/A
Permit #:
PP20230404293
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 1 underground gas line
Valuation:
N/A
Permit #:
PP20180820106
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
CIW& Sons Plumbing License info
Verified License
| License # | 1031018 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for CIW& Sons Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
105
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Markel Insurance Company |
21
Permits
- Building permit records show that CIW& Sons Plumbing has worked on 21 permitted projects.
CIW& Sons Plumbing Employees
DW
Demetrius Marlow Williams
Rmo / Ceo / Pres
DW
Demonya Markeshabern Williams
Officer