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Top-Rated Tankless water heater installers in Rancho Santa Margarita - Updated Nov 2026

Avatar for USA Water Heaters - Installation & Repair
USA Water Heaters - Installation & Repair
4.9(
102
)
Tankless Water Heater - Install

Serving Rancho Santa Margarita, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Warranties offered

"Dennis installed a new 75 gallon water heater and circulation pump in our home. His price was very competitive and lower than several other bids we got. He communicated with us well throughout the entire process. He worked around our schedule and the installation took only a couple of hours. The new water heater is working perfectly. I highly recommend Dennis and USA Water Heaters."
Navien Tankless Water Heater Installation in IrvIne, CA
Water heater installation and repair service in Mission Viejo, Ladera Ranch, Lake Forest, Las Flores, Rancho Santa Margarita, Trabuco Canyon, Coto De Caza, Foothill Ranch, Laguna Hills, Aliso Viejo, Laguna Niguel, Laguna Woods, Laguna Beach, Dana Point, San Juan Capistrano, San Clemente, Irvine, Tustin, Santa Ana, Orange, Villa Park, Anaheim, Anaheim Hills, Brea, Yorba Linda, Newport Coast, Newport Beach, Costa Mesa, Huntington Beach, Fountain Valley, Garden Grove, Westminister, Placentia, Full
AO Smith water heater installation Laguna Niguel, CA
Navien tankless water heater installation Irvine, CA
Same-day water heater installation and repair service in Orange County, CA

+32

Response time7 hrs
Response rate100%
Recommended by93%of homeowners
Avatar for THE Water Heater Company
THE Water Heater Company
4.9(
134
)
Tankless Water Heater - Install

Serving Rancho Santa Margarita, CA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"Absolutely Fabulous! Great service and very reasonable priced. We replaced an old 14-year Noritz tankless with a new Noritz tankless and this company is top notch. From the folks answering the phones (Nicole) to the on-site technicians (Evan was great), we received 100% fantastic, reliable, and fast service. Anthony spent 30-45 minutes on the phone discussing various model options before Evan arrived to take photos and assess the installation. Evan then presented us with clear bids for 2 different model options and returned with a colleague to install the new unit 2 days later. We would recommend this company to anyone wanting a tankless water heater. We also liked how the bid and invoicing process was handled 100% electronically. We also received texts and emails reminding us of the appointments and techs pending arrivals. 5 stars all around!!"
Van (Side view)
TWHC Vans
TWHC Vans
TWHC Vans
TWHC Vans

+83

Response time7 hrs
Response rate92%
Recommended by84%of homeowners
Avatar for Payless Water Heaters & Plumbing
Payless Water Heaters & Plumbing
4.2(
132
)
Tankless Water Heater - Install

Serving Rancho Santa Margarita, CA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Did a $59 consult only. Turned out the cost of repairing the old heater was almost as much as a new one, so we got a new one, and handled the install ourselves. Luis B was great, knowledgeable, friendly, didn't try to upcharge just to sell a heater, which we appreciated. Gave us an honest evaluation, several options, and was right on time. I will say, though, that the company failed to call me when he was on his way... not a big deal. All in all a good experience."
New Tankless Water Heater Installation
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+19

Response time8 hrs
Response rate100%
Recommended by73%of homeowners
Avatar for Speedy Water Heaters and Plumbing
Speedy Water Heaters and Plumbing
5.0(
21
)
Tankless Water Heater - Install

Serving Rancho Santa Margarita, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"The entire process from the initial call to actually getting to take a shower was easy and pleasant with Speedy Water Heaters. They were upfront with pricing, quick to schedule, installation was clean and timely, the tech was knowledgeable, efficient and so patient with all my questions. I would definitely recommend Speedy Water Heaters to my friends and family! Great job!"
Response time3 hrs
Response rate93%
Recommended by38%of homeowners
Avatar for WATER HEATER SOS
WATER HEATER SOS
5.0(
17
)
Tankless Water Heater - Install

Serving Rancho Santa Margarita, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"Unbelievable customer service. I’ve needed a new water heater for a while, been calling around for quotes. And this was the best!! They came out within a day and took out the old water heater and installed the new one within a few hours. Their customer service was top notch, their install was great and their clean up was very thorough and best of all was the price!"
Phyn Install
Phyn Install
Water Heater
Water Heater
Response time8 hrs
Response rate98%
31 neighbors recently requested a quote
Avatar for Service Champions Plumbing, Heating & AC
Service Champions Plumbing, Heating & AC
4.4(
50
)
Tankless Water Heater - Install

Serving Rancho Santa Margarita, CA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"We had a split mini system installed.. They removed old A/C,@ducts in attic and condenser outside and hauled away.. They are expensive, but they do quality work. Technicians well trained and know what they are doing. Friendly and very neat.."
Area Drain Cleaning
Plumbing
Plumbing
Garbage Disposal
Drain Cleaning

+13

Response time4 hrs
Recommended by79%of homeowners
Avatar for ROOTER ER & PLUMBING INC
ROOTER ER & PLUMBING INC
4.6(
24
)
Tankless Water Heater - Install

Serving Rancho Santa Margarita, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"I needed a new Water Heater. I upgraded to a new Tankless Water System. I am very happy with the work that Anthony did. He was on time and kept me up to date every step of the way."
tankless water heater uo to code
storm drain
same as above
gas line install
gas line install

+6

Response time11 hrs
Response rate94%
4 neighbors recently requested a quote
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