Water heater replacement in DuPage County typically costs between $900 and $3,500 in 2026, depending on the unit type, size, and installation complexity. Tank water heaters are less expensive upfront ($900–$1,800 installed), while tankless systems run $1.500–$3,500 or more but offer long-term energy savings.
Nobody wants to think about their water heater until they’re standing in the shower waiting for hot water that’s never coming — or worse, discovering a puddle spreading across their basement floor. We get it. But if you’re a homeowner in Wheaton, Naperville, Gelen Ellyn, or anywhere else in DuPage County, knowing what water heater replacement actually costs is genuinely useful information. The pricing varies a lot depending on what you currently have, what you want to replace it with, and some specific factors in our area. Let’s break it all down honestly.