Most Sonoma County tankless installations land between $3,600 and $6,500 installed. Here's what moves the number, what you save, and where 2026 rebates really stand.
Three scenarios, three price bands
These are real numbers from our own Santa Rosa and Sonoma County installs, current as of August 2026. Your written quote is exact and agreed before work starts: that's our upfront-pricing promise.
Financing available. Qualifying projects can be financed through Synchrony. Ask about it when you request an estimate.
The payback
At PG&E's current Sonoma County gas rate (~$2.78/therm), a typical family of four spends $555–$695 a year running a standard tank, 10–15% of it standby loss: heat leaking out of stored water while nobody's using it. A condensing tankless runs the same household for $360–$445 a year.
The 2026 rebate truth
National articles still promise a $600 federal tax credit for gas tankless units. That credit is gone.
In plain terms: buying gas tankless in 2026, budget the full installed price.
Open to electric?
Programs change mid-year; when we quote your job, we check what's actually open that week.
What's actually in that number
Anyone quoting it that way over the phone is guessing. The installed price covers:
Our quotes itemize all of it, so nothing is sprung mid-job.
Already own one?
Error codes, ignition failures, and flow problems are often repairable, and in our hard water, a descaling service brings many “dying” units back.
Mention the code when you call, or add it to the notes when you book online.
Water heaters
Free
On a new 40 or 50 gallon tank installed by Simeone, tank and parts coverage goes from 6 years to 10.
See water heater optionsSeniors 65 and older
10% off
For neighbors 65 and older. Mention the code when you book.
Residential only. One per household. Specials cannot be combined with each other or with any other discount.
Replacing an existing tankless runs around $4,000; a new condensing unit supplied and installed runs $5,500–$6,500, with outdoor placements cheaper than indoor. Gas line upsizing, long vent runs, and recirculation loops are quoted on top. We give an exact written price before any work begins.
Because the unit is only part of the job. A quote that seems low usually assumes your gas line, venting, and electrical are already tankless-ready, and in most Sonoma County homes they aren't. Ask any bidder: “does this include gas line upsizing, venting, condensate, permit, and isolation valves?” Our quotes itemize all of it.
If you're planning to stay in your home 5+ years, usually yes: $195–$250/year in gas savings, endless hot water, and a 15–20+ year lifespan versus 8–12 for a tank. For short stays or very low hot-water use, a quality tank can be the smarter buy. We'll tell you which, straight.
For gas tankless, effectively no: the federal credit ended December 31, 2025, and California's programs now fund heat-pump water heaters instead. If incentives matter to your budget, ask us about heat-pump options when we quote.
A like-for-like tankless swap is usually done in a day. A tank-to-tankless conversion typically runs one to two days depending on gas and venting work. You'll know the schedule before we start.
Yes. Water heater replacement requires a permit countywide, and tankless conversions get inspected. We pull the permit and handle the inspection as part of the job. It protects you at resale and it's the law.
Written quote, agreed before any work starts. Based in Santa Rosa, serving Sonoma County since 2007.
