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Find Plumbing installers for a remodel or addition in Castro Valley

Avatar for Plumbing 1 Builder's Inc
Plumbing 1 Builder's Inc
5.0(
16
)

Serving Castro Valley, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Leo did a very extensive plumbing repair that required digging through my bathroom floor and replacing a huge pipe to the outside. He also prepared and installed piping and fixtures for a bathroom remodel. Always showed up when he said he would and had a great crew. Cleaned up as well. Would highly recommend."
Response time3 hrs
62 neighbors recently requested a quote
Avatar for JPC Rooter & Plumbing
JPC Rooter & Plumbing
4.8(
46
)

Serving Castro Valley, CA and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Great service and quick. Plumber was very knowledgeable. Only negative was the appointment schedule. I was told between 1pm and 2pm but the plumber didn t arrive until 4pm. I think the dispatcher or owner needs to work on how to schedule clients. Plumber for me has no fault in that."
Our Work
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+56

Response time4 hrs
Recommended by100%of homeowners
Pedro Galvan Plumbing, Inc.
4.9(
20
)

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2004

Free estimates

Offers commercial services

"We are incredibly grateful to Pedro Galvan and his team for stepping in during a moment of urgent need. When our hot water system suddenly failed, leaving us without hot water for daily essentials, Pedro responded with a level of professionalism, clarity, and compassion that is truly rare. From the very first call, Pedro was attentive, transparent about pricing, and committed to solving the problem quickly. He provided us with the most cost-effective and honest quote out of several we obtained—and, even more importantly, was able to come almost immediately when others could not. His workmanship was precise, efficient, and tidy. It was clear we were in the hands of someone who genuinely takes pride in his craft. In a world where so many service professionals overpromise and underdeliver, Pedro Galvan delivers exactly what he promises—and does so with warmth, integrity, and a deep respect for his clients. We recommend him without hesitation to anyone needing plumbing services."
Response time8 hrs
Recommended by94%of homeowners
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
717
)

Serving Castro Valley, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"Can not imagine a better response, starting with my call for assistance, response time and how the technician, Tad methodically diagnosed the problem. We have an obscure kitchen fixture that required service in Feb 2019. Under warranty the problem was easily diagnosed by me, a problem possibly caused by me and a replacement part sent and installed by Albert Nahman team. Problem: I broke the faucet cartridge. Current Problem: restricted hot water flow in this kitchen sink only. Turns out the new cartridge part is now malfunctioning. I called and Tad arrived taking a step by step approach ruling out possible causes: a clog here or there, build up of sediment, or blockage in the lines or cartridge. The company that sells the product got on the phone with Tad and they collaborated on the problem and the tech person gave Tad one more thing to try. After the collaboration it is agreed, problem persisted and therefore that new cartridge part is now malfunctioning and will be shipped free of charge in two days. Thanks to all, who made this possible and I trust we will have Tad here again soon to finalize this fix. BTW, cost of service was less than expected given going rates for such a call lasting in excess of one hour. Another comment, spending time with Tad during the repair was a pleasure to have him explain, collaborate, listen and just chat. Questions on who to call next time, no question who I will call next time. I have read criticism of costs: In the Berkeley area "How much does it cost to hire a plumber? Some plumbers have a minimum fee for a service call. They might charge anywhere from $175-250 to come out and give you a consultation. Plumbers may give you a general service rate of $128-148 per hour when there are a lot of unknowns about a project and they aren't sure how long it will take. Some charge a flat rate for their plumbing services. For example, you may get charged $175 for a sink or drain cleaning, while toilet installation costs $500." Today costs are upfront, same as charges in Feb, $69 to arrive and assess the problem. Here in excess of one hour for $129 minus $25 coupon, total charge $173. I am ok and I expected these costs. If I was in Philly, where I grew up, I could call an uncle or cousin and get a better rate, a family rate. This is going rate for our area."
Living room Mini-Split
Aquasana home Filtration
Almost no disturbance at EBMUD meter
Navien with filtration to protect the heat exchanger
New house valve and Pressure Reducing Valve

+73

Response time8 hrs
Response rate99%
56 neighbors recently requested a quote
Avatar for Pipe Systems and Solutions
Pipe Systems and Solutions
5.0(
7
)

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

"We had a great experience with this plumber. He was professional, punctual, and very knowledgeable. He explained the problem clearly and fixed it efficiently. Everything was left clean and working perfectly. Fair pricing and excellent service — I would definitely recommend him and would use his services again."
13 neighbors recently requested a quote
Warriors Plumbing
5.0(
3
)

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2014

Free estimates

Credit card accepted

"Sergio's services were excellent. He was the first to call after I sent a request for recommendation to Home Advisor. He was prompt, arriving in advance of our appointment. He diagnosed and fixed both leaks (faucet and toilet) and provided excellent value for the cost. I'd call Sergio again for any plumbing problem. Thank's Sergio!"
Response time11 hrs
Recommended by100%of homeowners
Avatar for Albion Plumbing & Rooter Inc
Albion Plumbing & Rooter Inc
New to Angi

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

We have a single mission: Complete Customer Satisfaction! We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience.\nYou will find us to be competitively priced with close attention to the details.\nOur reputation is based on service, safety, and quality, regardless of how large or small the job.\nWe look forward to building a lasting relationship and guarantee your satisfaction!\n

1 neighbors recently requested a quote
Avatar for Fix- It Plumbing
Fix- It Plumbing
4.5(
179
)

Serving Castro Valley, CA and surrounding areas

In business since 2006

Free estimates

Credit card accepted

"Fix it Plumbing does a great job! They just re-piped my entire home with copper, removed and installed 2 new toilets, changed out all of the drains, changed the tub plumbing and fixtures, installed 2 faucets and a vanity, installed new pipes from the water source into the house, redid all sheet rock modified for access, and cleaned up and removed and hauled away all of the old, rusty and blocked galvanized steel pipes and fixtures. I also worked with them in 2019, when they put in a new connection to sewage using their trenchless system. Juan, Gabe, Chase, and Marco do a great job, and are always polite, and respectful of the homeowner and all that is going on during their work. I will use them again and highly recommended!"
Response time1 day
Recommended by98%of homeowners
Avatar for Superior Plumbing & Drain Cleaning Services
Superior Plumbing & Drain Cleaning Services
4.5(
561
)

Serving Castro Valley, CA and surrounding areas

In business since 2002

Emergency services offered

Warranties offered

"The plumbers from Superior Plumbing were excellent. They replaced and rerouted water pipes, changing from galvanized to copper pipes. The sewer lines in our house were repaired. They also replaced an aging hot water heater. The technicians arrived on time, worked diligently through the day, and were efficient. We added on the sewer repair which added an additional day. All work was completed within four days. I am impressed with their knowledge and workmanship. The technicians were tidy and removed all our old materials including the hot water heater. I would recommend Superior Plumbing and Drainage Co without hesitation."
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+9

Response time7 hrs
Response rate100%
Recommended by88%of homeowners
Avatar for Clearwater Plumbing
Clearwater Plumbing
4.9(
225
)

Serving Castro Valley, CA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"I called Clearwater plumbing but nobody answered the phone so I left a message. I got a callback within half hour and was told that Tyler was about to finish his work in Palo Alto so he could come in about 1 hour if I wanted. Tyler came on time and explained how he would do it after checking briefly. He started working on very quickly, shut off the water at the meter and knelt down to cut off the leaking valve. He replaced it with a ball valve and soldered the pipes neatly. He even polished the copper pipe at the end. The whole job was done in about 45 minutes, and I'm more than happy with the quality of the work. Even my picky dad gave it a thumb-up."
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+18

Recommended by97%of homeowners
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FAQs for plumbing installation for a remodel or addition projects in Castro Valley, CA

Adding bathroom plumbing to a detached garage starts with the basic line installation cost of $900 to $1,300. On top of this base expense, you'll need to budget for each fixture. A toilet costs  $250 to $550, sinks cost $150 to $800, and a shower or bathtub costs $400 to $1,900. The project will also require ventilation, moisture-resistant materials, and possibly electrical work. Remember that these costs reflect only the plumbing aspects—additional construction, finishing, and permitting expenses will apply to complete a functional bathroom space.

While certain aspects of garage renovation might be suitable for DIY enthusiasts, plumbing installation requires professional expertise. Connecting to water and sewer systems demands specialized knowledge and equipment, and improper installation can result in severe water damage, code violations, and potential health hazards. Most municipalities require permits for plumbing modifications, and these often stipulate that licensed professionals must perform work. Consider limiting your involvement to simpler tasks like painting or basic finishing work.

The timeframe for adding plumbing to a detached garage spans one to three days for the actual plumbing work. However, this represents only the active installation period. The complete project timeline must account for planning, obtaining permits (which can take weeks depending on your locality), coordinating multiple contractors if needed, and addressing any unexpected challenges that arise during installation. Weather conditions can also impact excavation and outdoor connection work.

Adding plumbing to a detached garage will likely increase your property taxes. Tax assessors consider plumbing an improvement that enhances property value and functionality. The specific tax impact varies by location and project scope. Converting a garage into living space with plumbing facilities can trigger significant reassessment in many jurisdictions. Before proceeding with your project, consult your local tax assessor's office to understand the potential tax implications and factor this ongoing expense into your decision-making process.

The Castro Valley, CA homeowners’ guide to plumbing installations for a remodel or addition

From average costs to expert advice, get all the answers you need to get your job done.