Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • WA Electrical Contractor Lic. #HOMECCA782DC • WA Plumbing Contractor Lic. #HOMECCA751QG • NATE-certified technicians • Carrier Factory Authorized Dealer • Mitsubishi Electric Diamond Dealer • Lennox Premier Dealer
The short version for Maple Valley homeowners
Home Comfort Alliance replaces tank, tankless and heat pump water heaters in homes all over Maple Valley, from our Sumner headquarters. The estimate is free. We file the city permit through Maple Valley's online portal, and your install comes with up to $300 off water heater installation.
Choose a heat pump model and Puget Sound Energy pays $1,000 back on a qualifying unit. We help you file the utility rebate claim.
Want a number first? Our online water heater quote gives a starting figure, and a licensed plumber confirms the real price at your home.
You can book by phone or online at any time. Dial (425) 645-0404 for the first open slot; our plumbers are out Monday to Friday, 8 AM to 5 PM, with same-day service when possible. Request your free estimate.
Five clues your tank is wearing out
Most tanks give hints before the last cold shower:
- Age and repeat repairs. The rating label usually carries a manufacture date. An older heater needing part after part is near its end.
- Rust in the hot water. Brown or cloudy water from hot taps only points at the inside of the tank.
- Moisture on the tank body. Dampness or a slow drip from the shell, not a fitting, means the steel has given out.
- Shrinking hot water. The second shower goes lukewarm sooner than it used to.
- Noise. Popping or rumbling while it heats points to sediment.
Not sure where a puddle came from? Our walkthrough on finding a water heater leak helps you trace it.
Repair the part or retire the tank?
The deciding question is what failed. Heating elements, thermostats, gas valves and igniters are parts, and swapping one on a solid tank often pays. A tank that leaks through its own wall has nothing left to fix, so replacement is the only answer.
For a diagnosis, a plumbing visit has a $99 dispatch fee. The plumber finds the fault, prices the repair at your home and lays out both choices before any work starts. Smaller fixes are covered on our water heater repair page.
Choosing a water heater for a Maple Valley home
PSE delivers both electricity and natural gas inside the city, so most homes can choose any of the three styles.
| Type | How it makes hot water | Fuel | Room and venting | PSE rebate (Nov 2026) |
|---|---|---|---|---|
| Storage tank | Holds a full tank at temperature, ready to draw | Gas or electric | Fits the usual garage or closet spot; a gas tank needs a proper vent | None listed |
| Tankless | Fires up only while a tap is open | Gas or electric | Wall mounted; a gas model needs venting and enough gas line capacity | None listed |
| Heat pump (hybrid) | Moves heat from surrounding air into the tank | Electric | Wants open air around it, so garages and basements suit it well | $1,000 on a qualifying Tier 3 or Tier 4 unit |
Read about tankless water heater installation, our tank and tankless comparison, why hybrid units make sense in Washington, or every service on our water heaters page.
How big a tank?
Washington's plumbing code ties tank size to first-hour rating. The table lists a 62 gallon rating for homes with 2 to 2.5 baths and 3 to 4 bedrooms, and a 74 gallon rating for 3 to 3.5 baths and 4 to 6 bedrooms. Tankless and heat pump units are matched differently, and your plumber does that math during the free estimate.
Permits for a water heater in Maple Valley
Which office issues the permit depends on whether your address sits inside the city line. We pull the required permits for every installation.
Inside city limits: the city's online portal
The City of Maple Valley accepts plumbing and mechanical applications only through its OpenGov permit portal. Simple residential jobs go in as express plumbing or express mechanical permits. Permit questions go to the Planner on Duty at 425-413-8800.
Electrical permits come from the state
The city sends electrical permits to Washington L&I, reachable at 360-902-5269.
Unincorporated King County
A Maple Valley mailing address outside the city line falls under Public Health Seattle-King County, which issues plumbing and gas piping permits there (206-263-9566).
What the state code asks for
Under WAC 51-56-0500, a water heater has to be braced against earthquakes, with one strap in the upper third of the tank and one in the lower third, the lower one at least 4 inches above the controls. A home on a closed system, such as one with a pressure-reducing valve, also needs an expansion tank, and the relief valve gets a discharge line piped to an approved spot. We include all of it.
Water heater costs in Maple Valley
We price replacements after seeing the job. Fuel type, tank size, venting, any gas or electrical changes and where the heater sits all shift the total. So it starts with a free estimate. For background, see our guide to water heater prices.
Prices we publish
| Service | Price |
|---|---|
| Replacement estimate | Free |
| Plumbing dispatch (repair quoted on site) | $99 |
| Tank water heater service | $230 |
| Tank water heater service added to a furnace, AC or heat pump service | $150 |
| Tankless service (no flush) | $230 |
| Tankless flush | $429 |
Prices as of September 2026.
Regional estimate, not our price: Angi puts the average cost to install or replace a water heater in Maple Valley at $1,646, with typical jobs from $1,040 to $2,131 (Angi, read November 2026).
Current offer: Up to $300 off water heater installation. Details on our special offers page.
Financing through Salal Credit Union or Synchrony starts at $179/month* (financing).
*Financing through Salal Credit Union or Synchrony, subject to credit approval. Rates, terms and monthly payments depend on the amount financed, the plan and your credit. 0% interest options are available to qualifying customers. See lender for full terms.
Get an estimateA comfort advisor will call you to set up your visit.
PSE money back, and what ended
Since PSE is the electric company in Maple Valley, its heat pump water heater rebate is the one that applies. When we read it in November 2026, the terms were:
- $1,000 back on a qualifying Tier 3 or Tier 4 heat pump water heater, or $1,100 for income-qualified homes through Efficiency Boost.
- Open to PSE electric customers, for units installed on or after January 1, 2026.
- The claim goes in within 30 days of installation, and each single-family home gets one rebate.
We help you file the utility rebate claim. Gas tank and tankless models had no PSE water heater rebate on that page. The federal 25C tax credit is also gone for equipment placed in service after December 31, 2025. See our PSE rebates page.
Your water district, gas service and a leaking tank
The city's comprehensive plan places Covington Water District across roughly the southern half of town and Cedar River Water and Sewer District across about the northern third, and the Cherokee Bay Community Club runs its own small system. To know yours, check the name on your water bill.
The supplier does not change the install. What matters is a pressure-reducing valve on the main line: it makes the plumbing a closed system, so the new heater needs an expansion tank.
Smell gas? Leave the house first. Then call 911 and Puget Sound Energy at 1-888-225-5773.
Tank dripping onto the floor? Shut the cold water valve above the heater, then call us at (425) 645-0404.
A recent water heater installation in Maple Valley
In November 2026 we installed a 75-gallon gas water heater in a Maple Valley garage. The new tank sits on a stand with a drain pan underneath, and the job included a new expansion tank, new water and gas flex connectors, reconnection to the existing venting and relief line, and a city permit. The homeowner also asked us to pressure test the system.
How a Maple Valley replacement unfolds
- Book by phone at (425) 645-0404 or online.
- A plumber visits for the free estimate and checks the old heater, the space, the vent and the gas or electric supply.
- You get the price in writing and decide; nothing is installed before that.
- We file the permit with the city portal, L&I or Public Health, depending on your address.
- The new heater is set, strapped, connected and leak tested.
- The inspector signs off on the work.
- On a heat pump model, we help you file the utility rebate claim.
What comes with your new water heater
- WA Plumbing Contractor Lic. #HOMECCA751QG (residential).
- Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD).
- 1-year labor warranty on installations, and we support the manufacturer's warranty on covered parts.
- We install all major water heater brands.
- Locally-owned since 1977.
- 4.8 stars from 5,000+ reviews.
- Walk-in office at our Sumner headquarters, 1524 45th St E, Suite 102, Monday to Friday, 8 AM to 5 PM.
- Best Pick Reports: Best Pick 2025 and 2026.
- BBB Accredited Business since 2002.
Where we work around Maple Valley
We cover all of Maple Valley (98038), on both sides of the city line, along with neighboring Covington and Black Diamond. Close by, we also serve plumbing customers in Kent, Auburn and Bonney Lake. See also heating in Maple Valley, Maple Valley heat pumps and all of our plumbing services.
Maple Valley water heater replacement: your questions
How much does a new water heater cost in Maple Valley?
It depends on type, size, venting, any gas or electrical changes and the install spot, so we start with a free estimate. The online water heater quote gives a starting figure, and you get up to $300 off water heater installation.
Is there a fee if my water heater only needs a repair?
A plumbing visit carries a $99 dispatch fee, and the plumber quotes the repair on site before doing it.
When is an old water heater still worth fixing?
When one part has failed on a tank that is otherwise sound, such as an element, thermostat or gas valve. Once the tank itself leaks, it has to be replaced. Your plumber prices both paths before any work starts.
Who issues the water heater permit inside Maple Valley city limits?
The City of Maple Valley, which takes residential plumbing and mechanical applications only through its online OpenGov portal, using express permits for simple over-the-counter jobs. Any electrical permit comes from Washington L&I. We pull the required permits for every installation.
My address says Maple Valley but I live outside the city. Who handles the permit?
In unincorporated King County, Public Health Seattle-King County issues the plumbing and gas piping permits rather than the city. We file with whichever office covers your address.
Will PSE pay me back for a heat pump water heater?
Yes, if PSE supplies your electricity, as it does across Maple Valley. PSE pays $1,000 back on a qualifying Tier 3 or Tier 4 heat pump water heater, or $1,100 for income-qualified homes through Efficiency Boost, and the claim goes in within 30 days of installation (pse.com, read November 2026). We help you file the utility rebate claim.
Can I get a rebate on a gas tank or gas tankless unit?
Not from PSE at the moment. Its water heater rebate page listed heat pump water heaters only when we read it in November 2026. We check again when we quote you.
Does it matter which water district serves my house?
Not for the install. Covington Water District covers roughly the southern half of the city and Cedar River Water and Sewer District about the northern third, so check the name on your water bill. What does matter is a pressure-reducing valve: with one in place, your new heater needs an expansion tank.
What size water heater does my household need?
Washington's plumbing code sizes tanks by first-hour rating: 62 gallons for 2 to 2.5 baths with 3 to 4 bedrooms, and 74 gallons for 3 to 3.5 baths with 4 to 6 bedrooms. Tankless and heat pump models are sized another way, and we work that out during your free estimate.
How soon can a plumber come out?
You can book by phone or online at any time, and we give you the first available visit. Our plumbers work Monday to Friday, 8 AM to 5 PM, with same-day service when possible. If the tank is leaking, close the cold water valve above it while you wait.
What warranty and payment options do I get?
Every install includes a 1-year labor warranty on installations, and we support the manufacturer's warranty on covered parts. Financing through Salal Credit Union or Synchrony starts at $179/month*. WA Plumbing Contractor Lic. #HOMECCA751QG (residential); licensed, bonded and insured in Washington.
Sources (read November 2026): City of Maple Valley building and land use applications; Public Health Seattle-King County plumbing and gas piping permits; PSE heat pump water heater rebate; PSE natural gas safety; Cedar River Water and Sewer District; City of Maple Valley Comprehensive Plan 2024, utilities element; WAC 51-56-0500; Angi, Maple Valley water heater costs.
Why Choose Home Comfort Alliance in Maple Valley?
Your Comfort is Our Promise
Reliable heating, air conditioning, plumbing and electrical service, all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during the installation process, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Get a Maple Valley water heater estimate
Tell us about your current water heater, and our Sumner branch will set up a free estimate with a written price before any work begins. Want a price range first? See water heater prices online.
Get an estimate
We will call you to set up the visit.