Your water heater picked the worst possible morning to start rumbling and leaking onto the garage floor. Now you’re standing there wondering if you should just replace it with the same tank, or finally look into one of those tankless units your neighbor in Bellevue keeps talking about. Both are good options — the right one just depends on your household, your gas or electric setup, and how much you want to spend upfront versus over time.
I’m Alina, and I help customers work through exactly this decision every week here at SPS Pro Services. Here’s what the numbers actually look like for homes in King and Snohomish counties, plus what tends to trip people up.
TL;DR
- Standard 40-50 gallon tank replacement: most jobs land between $1,800 and $3,200 installed.
- Tankless (gas condensing) install: most jobs land between $3,800 and $6,500 installed, more if venting or gas line upgrades are needed.
- Heat pump water heaters run $2,800-$4,800 and qualify for the biggest utility rebates right now.
- Older homes (pre-1990) in Seattle and Everett often need electrical or venting updates that add to the bill.
- Financing and PSE/Snohomish PUD rebates can bring the real out-of-pocket cost down significantly.
- A 20-minute call before your appointment saves you money by catching issues before the technician arrives.
Tank vs Tankless: What You’re Actually Paying For
A tank water heater is simple: it heats and stores 40-50 gallons, and it’s ready when you turn on the tap. Installation is usually quick because the pipe connections and venting already match what’s there.
A tankless unit heats water on demand, which means no standby heat loss and, in theory, an endless supply of hot water. But the installation is more involved. Gas tankless units often need a larger gas line and different venting than your old tank used, and electric tankless units can require a look at your electrical panel to confirm there’s enough capacity. If your panel is already maxed out — which we see a lot in older Seattle bungalows — that’s a separate project, and it’s worth checking our page on electrical panel upgrades if you’re not sure where your panel stands.
Cost Comparison Table
| Water Heater Type | Unit + Install Estimate | Typical Lifespan | Best For |
|---|---|---|---|
| Standard gas tank (40-50 gal) | $1,800 - $2,800 | 10-12 years | Straightforward swap, budget-conscious |
| Standard electric tank | $1,600 - $2,600 | 10-12 years | Homes without gas service |
| Gas tankless (condensing) | $3,800 - $6,500 | 15-20 years | Larger households, long showers, limited space |
| Electric tankless | $2,800 - $4,800 | 15-20 years | Smaller homes, no gas line available |
| Heat pump water heater | $2,800 - $4,800 | 10-15 years | Lowest operating cost, best rebate eligibility |
These are estimates for typical Seattle-area jobs. Older galvanized plumbing, tricky attic or crawlspace access, and code-required updates (like adding an expansion tank or seismic strapping, which Washington code requires) can push numbers toward the higher end.
Why Seattle and Snohomish County Homes Aren’t All the Same
A lot of the cost swing we see comes down to the house itself, not the equipment. Housing stock varies a lot between neighborhoods — plenty of homes in Seattle were built before 1960, and their original plumbing and electrical were never sized for modern tankless demand or EV chargers. If you’re also thinking about adding an EV charger installation down the road, it’s worth having one electrician look at both projects together instead of paying for two separate panel evaluations.
Out in Everett and other parts of Snohomish County, you’re on Snohomish County PUD for electricity rather than Puget Sound Energy, and PUD’s rebate programs for heat pump water heaters have historically been separate from PSE’s. If you’re in Bellevue or elsewhere in King County on PSE, check their current heat pump water heater rebate before you buy — it can change year to year, but it’s routinely one of the larger residential rebates PSE offers.
Rebates and Financing: What’s Actually Available
Heat pump water heaters get the most attention from utility rebate programs because they use a fraction of the electricity of a standard electric tank. PSE and Snohomish PUD both run rebate programs for qualifying ENERGY STAR heat pump water heaters, though amounts and eligibility change, so we always confirm current numbers before you commit rather than quoting last year’s figures.
Federal tax credits under Section 25C also apply to qualifying heat pump water heaters, worth checking with your tax preparer since the credit percentage and cap have shifted in recent years.
For financing, most homeowners split the cost with a 0% or low-interest promotional plan over 12-18 months, or a longer term loan if they’re bundling the water heater with other work, like a heat pump installation for their whole-home heating and cooling. Bundling projects during one visit also means one service call fee instead of two.
Signs You Need a Replacement, Not a Repair
Not every water heater problem means buying new. Before you assume replacement is your only option, it’s worth ruling out a repair:
- Rusty water only from the hot tap, not the cold — often fixable, sometimes a sign of tank failure
- Popping or rumbling sounds — usually sediment buildup, often resolved with a flush
- Pilot light won’t stay lit — frequently a thermocouple issue, a same-day fix
- Water heater is under 8 years old and otherwise reliable
If any of these sound familiar, start with our water heater repair page or just call us — a lot of “I need a new water heater” calls turn into a $200-$400 repair instead of a $2,000 replacement.
That said, if your tank is actively leaking from the tank itself (not a fitting), is over 10 years old, or has visible rust at the base, replacement is almost always the right call. Tanks don’t get safer with age.
Checklist: Getting Ready for Your Water Heater Visit
- Know your unit’s age and fuel type (check the sticker on the tank, or your gas/electric bill)
- Clear a 3-foot working space around the current water heater
- Note any recent changes — new appliances, remodels, added bathrooms — that might affect sizing
- Have your electrical panel accessible if you’re considering electric or heat pump models
- Write down water pressure or temperature complaints you’ve noticed, even minor ones
- Ask about permit requirements upfront; Washington State requires permits for water heater replacements
- If switching fuel types (gas to electric or vice versa), ask what line or venting changes are involved
- Confirm whether same-day installation is possible if your current unit is already failing
A Word on Combining Projects
If your water heater is going out around the same time as other home systems, it’s often smarter to plan together rather than react separately. We regularly get calls where a water heater failure happens the same season as furnace trouble or an AC that’s struggling — if your furnace repair or AC repair is also on your radar, mention it when you call. Scheduling one visit for multiple assessments often saves on diagnostic fees and gives you a clearer picture of what to budget for over the next year.
Mini-FAQ
How long does a water heater installation take? A standard tank swap usually takes 2-4 hours. Tankless installations typically take 4-8 hours depending on venting and gas line work.
Do I need a permit to replace my water heater in Washington? Yes. Washington State requires a permit for water heater replacement, and your contractor should pull it as part of the job rather than leaving it to you.
Is a tankless unit worth it if I have a small household? Not always. For one or two people with typical usage, a standard tank or heat pump water heater often has a lower total cost over its lifespan than a tankless unit, since the upfront price difference can outweigh the energy savings.
If you want a straight answer on what your specific setup needs, tank or tankless, gas or electric, call SPS Pro Services at (206) 427-8907 and we’ll walk through it with you before we ever show up at your door.