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Top-Rated Tankless water heater installers in Annapolis - Updated Nov 2026

Avatar for Same Day Plumbing, Heating, Cooling
Same Day Plumbing, Heating, Cooling
5.0(
1
)
Tankless Water Heater - Install

Serving Annapolis, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

Family-owned Same Day Heating, Cooling, Plumbing operates out of Windsor, just north of Santa Rosa. We offer fast, reliable AC repair and installation services, heater repair & installation, and plumbing services, in the North Bay area of California. Our promise to you is always that if we do not fix your system the SAME DAY we arrive… you DON’T pay the service fee. Our home service experts are licensed and insured with more than 100 years of leadership experience. Additionally, we back all of our installation and replacement services with a 24-month, 100% satisfaction guarantee.

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+8

53 neighbors recently requested a quote
Avatar for North West Plumbing
North West Plumbing
4.8(
50
)
Tankless Water Heater - Install

Serving Annapolis, CA and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"I hired Northwest Plumbing to do all of the plumbing on two different projects. One was an extensive home remodel/addition which was basically doing all of the plumbing for a new home. Drain/waste lines with sewer hookup, natural gas plumbing including a new gas meter location, and of course all of the new hot and cold water lines including a tankless hot water heater. He has completed all phases thus far in a professional and timely manner. Including making special trips to rectify little problems that have come up during construction. We will be prepared for him to complete the finish plumbing in 4-6 weeks and I have every confidence it will be done with the utmost craftsmanship. The other project was a garage addition on an adjacent property where he assisted me in relocation of close to 100' of 4" sewer line. He then plumbed a drain line, and installed water supply lines for a utility sink in the garage. I will be using Francisco for all my future plumbing needs, both large and small."
new water heater
New water heater
Response time11 hrs
Response rate88%
Recommended by91%of homeowners
Avatar for Mega Power Electric, Inc
Mega Power Electric, Inc
5.0(
191
)
Tankless Water Heater - Install

Serving Annapolis, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"We recently had Mega Power Electric Inc install a solar system and panels. The President and provided excellent communication all the way through the process. He even met with us after installation to explain the almost incomprehensible PG&E bill. Although not the least expensive bid, his was competitive and I felt he was as interested in educating me about solar and the various types of panels and inverter systems as he was in selling a system. He demonstrated how the array of panels would meet our energy needs and as opposed to some of the other companies, wasn't selling us more than we needed. We are very satisfied with our solar system and I highly recommended Mega Power Electric Inc."
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+32

Recommended by100%of homeowners
Avatar for Landmark Energy Upgrades
Landmark Energy Upgrades
4.8(
59
)
Tankless Water Heater - Install

Serving Annapolis, CA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"I'm very happy with the work that was done by Landmark construction and energy crew. At first, we met with Ron that came over and met with us about the issues that we had with our water heater and with the bills that we currently pay for electric. Ron recommended us to replace the bulky old water heater and to install a tankless system that will supply hot water immediately and with the use of less gas. We liked that idea and we decided to go for this project. Ron came over to our house with his 2 people that basically took care of all the removal and the installation of the new system. The work that they did took only 2 days from start to finish and now we have more space at the garage, and the bills are much lower than before…."
Cool Roof Install
Energy Upgrade
HVAC Air Duct
Home Energy Audit
Energy Upgrade Contractors

+6

Recommended by98%of homeowners
Frenchie's Plumbing
4.8(
8
)
Tankless Water Heater - Install

Serving Annapolis, CA and surrounding areas

In business since 2012

Free estimates

Credit card accepted

Frenchie is a well-established business owner with over 5 years of unmatched experience. Whether you need a simple faucet installed or complete sewer line replacement, we have you covered. We continually strive to exceed expectations by ensuring that each client receives the very best service. Call today for a free consultation, we will explain all of your available options so that you can make an informed decision about what is right for your home or building.

Response time1 day
Recommended by100%of homeowners
Avatar for AP Plumbing Co
AP Plumbing Co
5.0(
6
)
Tankless Water Heater - Install

Serving Annapolis, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"Oscar was recommended to me by a local contractor and my experience with him was absolutely the best of any subcontractor i have hired! He did the rough in on a two bathroom addition at a fair price and with an extremely clean installation. He was very conscientious and finished ahead of schedule. When I called Oscar to come back to install the fixtures he got me right into his schedule and again exceeded all expectations. I will never need to find another plumber because I have now found the best!!"
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+14

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