ABOUT US
CIW & Sons Plumbing Co., is a family owned plumbing business, that is licensed, bonded and insured to operate in California. With over 200 years of combined experience, CIW has 18 active family members signatory to the UA & Local 38 Plumbers & Pipefitters Union. CIW specializes in new construction, remodeling, maintenance and tenant improvement for clients. Never compromising on quality, CIW has the experience and plumbing knowledge to get the job done.
Our team of professional plumbers are available 24/7 to provide prompt and reliable service whenever you need it, ensuring your home or business stays fully operational at all times.
"CIW was a pleasure to work with on the Sunnydale Hope project. They helped to coordinate design and fabrication of the stack that were used in the production of the building. Their team was able to work with the demanding schedules of residential construction and kept the work area tidy and organized. Larratt continues to work with Mr Williams and his team to deepen a partnership that developed from the Sunnydale Hope project."
Aaron Gianni
Prime Subcontractor
“CIW & Son's Plumbing Co. has built and established a great working bond of commitment, professionalism, and responsible plumbing expertise. Their knowledge of plumbing mechanics is excellent!”
Kevin H. Jaramillo, Assistant Superintendent,
Pilot Construction Management Inc.
“CIW & Son's Plumbing Co. has built and established a great working bond of commitment, professionalism, and responsible plumbing expertise. Their knowledge of plumbing mechanics is excellent!”
Kevin H. Jaramillo
Assistant Superintendent
Pilot Construction Management Inc.
"CIW was a pleasure to work with on the Sunnydale Hope project. They helped to coordinate design and fabrication of the stack that were used in the production of the building. Their team was able to work with the demanding schedules of residential construction and kept the work area tidy and organized. Larratt continues to work with Mr Williams and his team to deepen a partnership that developed from the Sunnydale Hope project."
Aaron Gianni
Prime Subcontractor
LICENSES & CERTIFICATIONS
CA LICENSE #1031018 | DIR #1000056754
LBE | MBE | SBE | DBE
Signatory to UA Local 38 Plumbers, Steamfitters & HVAC/R

OUR SERVICES
Whether you need a simple faucet installation or complete sewer line replacement, we offer a wide range of residential and commercial plumbing services to meet your needs. We continually strive to exceed expectations by ensuring that each client receives the very best service.
Detailed Plumbing Design Consultation:
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We collaborate with architects, engineers, and general contractors to review and refine plumbing system designs.
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We provide expert insights on optimal layouts, materials, and fixtures to enhance efficiency and performance.
Cost Estimation and Budgeting:
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We develop accurate cost estimates for plumbing installations and materials based on project plans and specifications.
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We assist in creating and managing budgets to align with project goals and financial constraints.
Value Engineering:
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We identify cost-saving opportunities without compromising quality or performance.
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We suggest alternative materials and methods that may provide better value or improve project outcomes.
Code Compliance and Permitting:
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We ensure that all plumbing designs meet local building codes and regulations.
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We assist with the preparation and submission of necessary permits and documentation.
Constructibility Reviews:
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We evaluate plumbing designs for practical implementation, identifying potential issues or conflicts with other trades.
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We provide recommendations to optimize installation efficiency and address any constructibility concerns.
Schedule Coordination:
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We develop detailed plumbing installation schedules that align with the overall project timeline.
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We coordinate with other subcontractors and stakeholders to ensure timely and seamless integration of plumbing systems.
Risk Management:
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We identify potential risks related to plumbing systems and propose mitigation strategies.
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We address any concerns related to system performance, maintenance, or future upgrades.
Technical Support and Documentation:
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We provide technical support during the design phase, including reviewing drawings, specifications, and other relevant documents.
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We offer detailed documentation and reports to support informed decision-making and project planning.
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Civic and Institutional Buildings
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CIWS has a strategic edge when it comes to public buildings and civic institutional buildings due to its LBE/DBE certifications that assist you in achieving your local participation goals. Additionally, CIWS is able to achieve all local hire requirements.
Residential Buildings
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CIWS has extensive residential experience, from low rise to high rise, CIWS is always ready to make your residential project a success.
Mechanical Process Piping
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CIWS has tremendous experience in installing mechanical process piping for large infrastructure projects. Coupled with its local hire and participation requirements, CIW makes for a great partner.
Office Buildings
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Reliable plumbing is a must to ensure the operational efficiency of your office building. We guarantee that with our administration, you will have dependable facilities at all times.
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Inspections
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Water Leaks & Water Pressure Issues
Pipe & Leak Repair
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Toilets, Faucets, Garbage Disposal & Sinks
Sewer Management
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Cleaning, Repair & Replacements
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O: (415) 8292230
C: (415) 571-0222
Our licensed electricians are available around the clock to handle any emergency—whether it’s a sudden power outage, electrical fault, or urgent repair need. Trust us to get your home or business back on track, safely and efficiently. We look forward to serving you!