3 Essential Services.

1 Winning Price.

Water Heater Flush

HVAC System Tune Up

Water Quality Test

Our Offers

1 Year FREE Annual Maintenance

With new water heater install

*Bronze maintenance plan. Restrictions apply.

0% APR for up to 18 months

or as low as $67.75 per month

*With approved credit. Restrictions Apply

FREE 10 year warranty new water heater install

A $250 value!

*Cannot be combined with other offers. Restrictions apply

      
 Excellent4.9656 reviews
 4.9
 Excellent656 reviews
  Write a review 
 
 
 
   
 
 
      Posted on Google  
   
   Andrew Lamson 
 11 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Nam Park was an excellent technician. He was patient and thorough. He was very careful with the house and wore protective booties until he put down blankets. He updated me regularly and worked expediently. Would highly recommend.
  
 
     Posted on Google  
   
   Allan De Guzman 
 10 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. CHRISTOPHER DOHRER is the best technician.he do amazing jobs👏🏻👏🏻
  
 
     Posted on Google  
   
   Jerry Hubner 
 10 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Castle works responded with a technician on site within 2 hrs. Chris was professional and efficient in his presentation of the products available to us. We are very happy that the installation only took 2 hrs and that the completed project was left clean and looking great. Thank you Chris
  
 
     Posted on Google  
   
   Danielle Benz 
 9 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Miguel was the technician that arrived within a few hours of my call to check on my water heater. He quickly assessed the situation and provided me options. I decided to go with a new water heater and he had it installed in just a couple hours. I was able to give my toddler a warm bath before bedtime!
  
 
     Posted on Google  
   
   william biagi 
 9 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. On Sunday November 8 our water heater broke down and also had a bursted pipe. We called CastleWorks Water Heaters and they made sure we turned everything off properly and set up the water drain system correctly. Within 90 minutes a technician named Erik Vargas arrived, and let me tell You -- this Guy was fantastic! Erik went through all of our options and explained everything perfectly and then went to work installing our new Water Heater. After the technician Erik left our garage looking better than it ever has. CastleWorks gets a rating of💯👍🧑‍🔧 from us.  W.P. Biagi
  
 
     Posted on Google  
   
   Patricia Stockton 
 7 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Christopher was a very knowledgeable technician. He explained everything he did and why he was doing it. He was also very nice and friendly. I would recommend him to anyone.
  
 
     Posted on Google  
   
   Richard Hartnett 
 6 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Miguel did a great job! Very pleasant to talk to and very efficient. Also very knowledgeable about water heaters and installation.
  
 
     Posted on Google  
   
   jeff carey 
 6 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Jacob was our service technician. He was very professional and resolved the problem we had with our hot water heater.
  
 
     Posted on Google  
   
   Jessie Lopez 
 6 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Very friendly and knowledgeable
  
 
     Posted on Google  
   
   Tom Thomas 
 2 November 2026
 
 
 Trustindex verifies that the original source of the review is Google. Came out same day to inspect then replace my 8 yr old water heater. Knowledgeable technician Chris got to work after showing us the options.

No Hot Water? No Problem. Call the Water Heater Professionals at Castleworks Today!

(925) 267-8531

Water Heater Services from Trusted Experts

Traditional & Tankless Hot Water Heater Solutions

The worst way to start your day is waking up and stepping into an ice-cold shower. If you are dealing with a broken hot water system, the water heater pros at CastleWorks have the solution you are looking for. We have a team of certified and experienced hot water system experts who can resolve all of your heating or water-tank related issues within a quick time frame. As water heater specialists, we work almost exclusively on these systems. This allows us to bring a greater level of care and precision to our profession than the average plumber.

Why CastleWorks is becoming one of the most popular water heater companies in the East Bay:

Our seasoned team members have 7-10 years of experience.
We are open for water heater repair 7 days a week.
We can install a brand new unit in just 3 hours.
We offer 4 different install packages to suit your specific needs.
Certified installers of Noritz Tankless Systems and HALO Water Filters.

Our water heater repair team understands that you may have many questions about your system if it’s not working properly. We will walk you through the benefits of installing a new unit if your tank is leaking, but you can trust us not to oversell you on equipment that you don’t truly need.

We Offer Financing For Any Budget

Our financing options will give you peace of mind while ensuring your home is running on the best equipment on the market.

Comfort, Efficiency & Savings. You can have it all!

Learn More

Contact Us Today!

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The CastleWorks story began in 1995 and grew from the collaboration of many dedicated local professionals committed to service. Our family of businesses includes: