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Installed cost
HomeGuide puts a whole-house water filtration system at $850–$5,400 installed on average.1
| System | Installed (HomeGuide) |
|---|---|
| Whole house | $850–$5,400 |
| Under sink | $170–$580 |
| Well water | $800–$4,000 |
What drives the price
System type matters most. Basic carbon or sediment setups sit at the low end, while adding UV or a softener raises the price.1 Your water source matters too: well water often needs more stages.
Check what it's certified for
NSF/ANSI 42 covers aesthetic issues like chlorine, taste and odor. NSF/ANSI 53 covers specific health contaminants named in the listing.2 Neither one softens water. See filters vs. softeners.
More: well water treatment · dealer checklist
Sources
- HomeGuide: home water filtration system cost (2026)
- NSF: NSF/ANSI 42, 53 and 401 filtration standards
Last reviewed Oct 13, 2026. This is general information, not professional advice. Confirm figures with your utility and installer.