CastleWorks Home Services

★★★★☆ 3.8 / 5 (27)
Emergency Call


: 3193 Diablo Ave, Hayward, CA 94545
: (833) 921-9006
: https://castleworks.com/san-francisco/

Company Overview

Since 1995, CastleWorks Home Services (formerly Affordable Water Heater & Plumbing) has been dedicated to the Greater San Francisco Bay area. Our offerings include a wide range of services, including installation and repair of tankless and tanked water heaters for homes and businesses, plumbing, leak detection, HVAC services, furnace repair and installation, air conditioning solutions, and heat pump services.

We offer free in-home estimates for installation costs and thorough diagnostics for any water heater issues. Expect clear pricing from our friendly dispatchers, and rest easy knowing our certified and insured technicians back their work with a 100% Satisfaction Guarantee. Trust us to identify the optimal and affordable solutions for your household.

Our services include repair and replacement for water heaters, plumbing, drains, HVAC, leak detection, rooter services, and additional offerings. CastleWorks is part of an expanding family of home service businesses. Our story began with a team of driven entrepreneurs. Each of these businesses started small, growing their family-owned operations from the ground up in their unique areas of expertise. Over the years, their successful ventures have delivered expert plumbing, air conditioning, heating, and water heater services across California. By prioritizing quality and customer satisfaction, each company has fostered specialized training and job opportunities for their technicians and team members.

CastleWorks' journey progresses as we help homeowners regain their peace of mind through exceptional home service solutions characterized by unmatched skill, integrity, and respect.

Business Services

  • Hot water recirculation pump installation
  • Hot water recirculation pump repair
  • Plumbing inspection
  • Plumbing installation or replacement
  • Plumbing repair
  • Water heater installation
  • Water heater repair
  • Water purification system cleaning and maintenance
  • Water purification system installation
  • Water purification system repair
  • Salt delivery

Business Location & Hours



Mon:Open 24 hours
Tue:Open 24 hours
Wed:Open 24 hours
Thu:Open 24 hours
Fri:Open 24 hours
Sat:Open 24 hours
Sun:Open 24 hours

Recommended Customer Reviews

Ana L.
★★★★★

We woke up to no hot water yesterday.
Trey came by today and did a great job explaining all the different options. We ended up buying a new water heater. He put it in promptly. He was nice and sweet with the dog I was caring for. He is terrific at his job! I recommend him highly.

Michael Law ..
★☆☆☆☆

Pls do not ever use this company, I purchased a brand new water heater from them, it did not work after 4 years , when I call them they told me it is under Warranty as it has 6 years warranty. Then when their technician arrived they want to charge me $500 labor cost to change one part that take them around 30 minutes.
Even a lawyer does not make that much in half hour of work. Anyway I needed the hot water. So I went ahead paid them.
Then after they left, we smell gas leak. We have to call PG&E and they came and detected the gas leak is from the part that they changed. So we have to shut off the gas and no hot water again for 4 more days before they can schedule another guy to come back to fix the gas leak. Then after this guy leave, we still smell gas leak. Then we call PG&E again, they came and detect another gas leak again from another place that they did not tighten the lugs. It just show their technician are extremely careless and not well trained.
Fortunately the PG&E guy was nice enough and helped us to fix the leak at no charge.
When I called them to complaint the gas leak. They said they will pass the message to a manager call James. This guy never return my call. Totally ignored the problem that they created.
I had to spent hundreds dollars to stay at hotel while there is a gas leak and no hot water again after paying them $500 labor cost. So it is reasonable that this company should compensate me for the hotel expense due to their technician fault, but they just will not do it.
So pls do not ever do business with this company. Unless you want to have hazard and burn down your house. If I could give them negative rating. I will rates them negative 5 stars. For your own safely. Pls do not trust this company.

Bernetta W.
★★★★★

Had my water heater replaced today by Christian Nevin. He was very friendly and did an excellent job!

Mekarie R.
★☆☆☆☆

Samantha, no confusion. It's quite simple. What Castleworks tried to do isn't legal. You can't void or alter a warranty that you did not issue.

Shiva B.
★★☆☆☆

After seeing my Yelp review they asked me to call to discuss my concern and I did but the person who answered did not recognize the person who had responded to my review and said she'll relay my message to their marketing team and someone would call but again, no one called back.

Donna F.
★★★★★

Our hot water heat started gushing out of the blue; called Castleworks & they had a tech come same day. Christian was courteous and after examining our heater determined it needed to be replaced. He explained our options with clarity and answered all of our questions. Once we decided, he had everything with him & got to work; he reviewed the unit with us after it was installed. Our day started with panic & ended in calm. Thank you Christian and Castleworks!

Mike S.
★☆☆☆☆

My water heater has leakage and stop working, I called Castle for help.

1, They charged 3094$(material cost ~ 1100$) for water tank replacement. they claimed their job has high standard.
2, After I agreed they do the Job. They asked to sign a agreement that I acknowledge they do the job urgently and waive my right to cancel the contract.
3, Later they told me that they need turn off the main water valve on the street and any potential water pipe clog indued by water flow back and forth will be customer's responsibility as my house use galvanic water pipe, which are commonly used in old house. (I feel surprised by this statement, If they tell me this before I sign the agreement, I would not let them do this job).
4, After Job done they left. I found the PVC tube extension out side the wall block the ventilation window from the washer/dryer. I usually access to the window to clean the ventilation chamber every two years. Now I can not open that window.
5, I also found the power cable from washer/dryer unplugged without putting it back. Front yard hose was taken off from the faucet without putting it back. I have to put it back with some teflon tape to prevent leakage.
6, Last I found one of my back yard water pipe clogged, No water flow from the faucet. It happen just after this water tank replacement done. I never had this water pipe clog issue in the past 10 years. I talked to them, and they refused to fix this issue as they said it is customer's responsibility due to the galvanic metal water pipe. I feel frustrated and have to spend more money to find plumbers to fix this issue.

Yuna S.
★★★★★

Our water heater broke, and CastleWorks was prompt in getting someone to our house. Luis V was thorough in explaining what the issue was, what possible options I had, and answered all my questions patiently. Replaced the part and fixed the water heater in just about an hour. Thanks Luis!

Craig M.
★★★★☆

Luis saved us. Thankful we were at home when it happened. Called an about our water heater. Luis came out assessed and installed the same day (and on his day off). Luis was so nice, honest, professional, informative and did a fantastic job. Thank you Castleworks and Luis.

Cold Fried C.
★★★★★

Our water heater was old and leaking although one of their servicemen Luis V. helped us out by replacing the water heater quickly giving us all the information we needed. He was very kind and helpful!

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