How Much Does a Whole House Water Filtration System Cost?
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On this page
- Whole house water filtration cost at a glance
- Whole house water filtration cost by system type
- Sediment and carbon systems
- Systems with UV disinfection
- Systems with a water softener
- Whole-house reverse osmosis
- Cost by home size
- City water vs. well water costs
- Installation costs and extras
- Can you install it yourself?
- Ongoing costs: filters, power, and service
- Example: 5-year cost of a basic city-water system
- Is whole home water filtration worth it?
- What raises or lowers your price
- Questions to ask installers
- How to avoid overpaying
- Next steps
- FAQ
- Frequently asked questions
- Sources
Quick answer
Whole house systems treat every drop that enters your home, from the kitchen tap to the shower. That's why they cost more than a pitcher or under-sink filter. But the price range is huge, and most of it comes down to one question: what's actually in your water?
This guide shows real cost ranges from national data, what changes the price, the yearly cost of filters, and when a whole home system is worth it. We'll also help you avoid paying for treatment you don't need.
About these numbers: Figures come from Angi and HomeGuide national cost data. Angi's 2026 average is based on 8,441 projects. These are estimates, not quotes. Always get local, itemized bids.
Whole house water filtration cost at a glance
| Cost item | Typical range | Source |
|---|---|---|
| Water treatment system, national average | $2,274 | Angi |
| What most homeowners pay | $1,128–$3,540 | Angi |
| Whole house filtration, installed | $850–$5,400 | HomeGuide |
| Whole house systems (all types) | $1,500–$10,000 | Angi |
| Well water filtration, installed | $800–$4,000 | HomeGuide |
| Installation labor (whole house) | $200–$600 | HomeGuide |
| Water test before buying | $50–$200 (Angi); $100–$300 (HomeGuide) | Angi, HomeGuide |
| Replacement filters per year (DIY) | $150–$250 | HomeGuide |
| Total first-year cost | $1,000–$5,650 | HomeGuide |
Whole house water filtration cost by system type
Most whole house systems are built from stages. Each stage you add solves a problem and adds cost. HomeGuide's installed prices by setup:
| System setup | Installed cost | Best for |
|---|---|---|
| Sediment + carbon (+ mineral) filters | $850–$1,400 | City water: chlorine taste, odor, sediment |
| Above + UV light | $1,850–$2,900 | Well water with bacteria risk |
| Above + UV + water softener | $2,650–$5,400 | Well or city water that is also hard |
| Whole-house reverse osmosis | $4,800–$8,000 | High dissolved solids or specific contaminants |
Source: HomeGuide. Prices include materials and labor.
Angi groups systems a little differently (Angi):
| System type | Angi 2026 average cost |
|---|---|
| Whole-house system | $1,500–$10,000 |
| UV purification | $500–$2,000 |
| Water softener | $700–$3,000 |
| Combination system | $2,000–$6,000 |
| Under-sink filter (for comparison) | $150–$600 |
Sediment and carbon systems
This is the most common whole house setup on city water. A sediment filter catches sand and rust. Activated carbon reduces chlorine taste and odor. The CDC notes that filters certified to NSF/ANSI 42 improve taste and odor (CDC). If you need to reduce a health-related contaminant, look for certification to the standard that covers it, such as NSF/ANSI 53, and confirm the claim in NSF's listings (NSF).
Systems with UV disinfection
UV light kills or inactivates germs. It's mostly used on private wells. Connecticut's Department of Public Health notes UV needs clear water to work, so it's usually placed after sediment filters, and its lamp should be replaced at least once a year (CT DPH). HomeGuide lists UV lamp replacements at $20–$100.
Systems with a water softener
A filter and a softener solve different problems. Filters reduce chemicals and particles. Softeners remove hardness minerals. If you need both, budget for both. A softener alone usually runs $1,200–$3,800 installed. See our water softener cost guide for the full breakdown.
Whole-house reverse osmosis
Whole-house RO is the priciest option: $4,800–$8,000 installed per HomeGuide, and $4,000–$11,000 per Angi's softener cost page (Angi). It also sends some water down the drain. Most homes put RO only at the kitchen sink instead. HomeGuide lists under-sink RO at $300–$950 installed. Learn more in our under sink reverse osmosis guide.
Cost by home size
Angi prices systems by the number of people they serve, since more people means higher flow:
| System size | Average cost (Angi 2026) |
|---|---|
| Small (1–2 users) | $300–$1,000 |
| Medium (3–5 users) | $1,000–$3,000 |
| Large (6+ users) | $2,500–$6,000 |
Source: Angi.
Flow rate matters as much as headcount. A system that's too small for your peak use (two showers plus the washer) can drop your water pressure. Ask installers for the system's rated flow in gallons per minute and compare it to your home's demand.
City water vs. well water costs
City water is treated and tested by your utility. Your water supplier must send you an annual water quality report, called a Consumer Confidence Report (EPA). Many city homes only need sediment and carbon, which keeps costs near the low end.
Well water is a different story. Private wells aren't regulated by the EPA, and owners are responsible for testing. The CDC recommends testing at least once a year for total coliform bacteria, nitrates, total dissolved solids, and pH (CDC). Iron, manganese, sulfur, or bacteria each add stages. HomeGuide puts well systems at $800–$4,000 installed, and Angi lists sediment pre-filters for well water at $100–$400.
Read more about well water filtration systems.
Installation costs and extras
HomeGuide puts whole-house labor at $200–$600. Angi says plumbers charge $45–$200 per hour, with whole-house installs taking four to eight hours or more. These extras can add up:
| Extra | Typical cost | Source |
|---|---|---|
| Water quality test | $50–$200 | Angi |
| New drain line (for backwashing or RO systems) | $300–$800 | HomeGuide |
| New electrical outlet (UV, softener, controls) | $150–$350 | HomeGuide |
| Pipe extensions (25+ feet) | $150–$850 | HomeGuide |
| Plumbing permit | $30–$500 | HomeGuide |
| Removal of old system | $50–$200 (Angi); $40–$300 (HomeGuide) | Angi, HomeGuide |
| Bypass valve or shut-off | $75–$250 | Angi |
| Extra filtration stage (e.g., fluoride, heavy metals) | $100–$600 per stage | Angi |
| Water quality monitoring device | $150–$600 | Angi |
Pro tip: Ask for a bypass valve even if it costs a bit more. It lets you change filters or service the system without shutting off water to the whole house.
Can you install it yourself?
Simple cartridge systems are DIY-friendly if you can cut and join pipe. Angi says DIY can save $200 to $1,000 in labor but recommends a licensed pro for whole-house, RO, or any job needing plumbing changes. A leak at the main line can cost far more than the labor you saved.
Ongoing costs: filters, power, and service
| Ongoing cost | Typical range | Source |
|---|---|---|
| Whole-house replacement filters (DIY) | $150–$250 per year | HomeGuide |
| Whole-house maintenance overall | $150–$500 per year | Angi |
| Carbon, sediment, or iron cartridge | $15–$65 each | HomeGuide |
| UV lamp | $20–$100 | HomeGuide |
| Electricity (UV, controls) | $2–$10 per month | Angi |
| Optional pro maintenance | $100–$300 per year | Angi |
| Typical repair | $75–$400 (Angi); $100–$500 (HomeGuide) | Angi, HomeGuide |
Skipping filter changes is a false economy. Clogged filters cut water pressure, and the CDC warns that poorly maintained filters can grow germs. Use our water filtration maintenance schedule to stay on track.
Example: 5-year cost of a basic city-water system
Using the published ranges above (an illustration, not a quote):
| Item | Low | High |
|---|---|---|
| Sediment + carbon system, installed | $850 | $1,400 |
| Replacement filters, 5 years ($150–$250 per year) | $750 | $1,250 |
| 5-year total | $1,600 | $2,650 |
That works out to about $320 to $530 a year for filtered water at every tap.
Is whole home water filtration worth it?
It depends on what you're trying to fix. The CDC makes a simple point: "If your tap water does not contain harmful germs or chemicals, you may not need a filter" (CDC).
A whole house system is usually worth it when:
- Sediment, iron, or rust stains affect every fixture
- You have a sulfur ("rotten egg") smell from all taps
- You're on a well that needs disinfection or multiple treatment stages
- You want to reduce chemicals, such as certain volatile organic compounds, in all water, including shower water. The CDC notes whole-home filters are worth considering for this case.
- You dislike chlorine smell in the shower, not just the drinking water
An under-sink filter is probably enough when:
- Your only concern is drinking and cooking water
- Your city water report shows no problems you care about
- You rent or plan to move soon
There's one more trade-off. The CDC notes that if a whole-home filter removes chlorine, "more germs may grow in your plumbing." That's manageable with good habits, but it's worth knowing.
What raises or lowers your price
Two homes can buy similar systems and pay very different amounts. Here's why.
Materials. Angi notes plastic housings are the most affordable, while stainless steel and composite tanks cost more but resist corrosion and last longer (Angi).
Number of stages. Each stage adds equipment and labor. Angi lists extra stages, like fluoride or heavy metal reduction, at $100 to $600 each.
Location of the main line. HomeGuide notes that installing in attics or cramped spaces raises labor costs. A basement or garage near the main shutoff is the easiest spot. HomeGuide recommends installing whole-house filters near the main shutoff, before the line branches.
Drain and power needs. Cartridge systems usually need neither. Backwashing tanks, softeners, and RO need a drain, and UV or electronic controls need an outlet.
Your region. Labor rates vary a lot. Angi notes urban and high-cost areas tend to charge more.
Brand and warranty. Premium systems often include longer warranties or higher-capacity media. Compare the cost per gallon of filtered water, not just the sticker price.
Questions to ask installers
HomeGuide recommends getting itemized quotes and asking questions like these (HomeGuide):
- What exactly does each stage remove, and is it certified for that?
- Does the quote include a water test?
- Does the bid include all labor, materials, permits, and cleanup?
- What will replacement filters cost each year, and how often?
- Do you offer a labor warranty?
- Will you pull permits and handle inspections?
- Do you offer an ongoing maintenance plan, and what does it include?
Write the answers down. It makes comparing three quotes much easier.
How to avoid overpaying
- Test first. Use your city water report or a certified lab test. Buy treatment for problems you actually have.
- Match certifications to your problem. Check product claims in the NSF or WQA databases.
- Size for flow. Ask for gallons-per-minute ratings.
- Get three itemized quotes. HomeGuide recommends comparing at least three companies.
- Ask what the filters will cost. A cheap system with expensive proprietary cartridges isn't cheap.
- Bundle work. If you need a softener too, install both at once to save on labor.
Next steps
Not sure you need every tap treated? Compare single-tap options in our under sink water purifier guide. If hard water is also a problem, see our best water softener buyer's guide. Already own a system that's acting up? Start with our water softener repair guide or our water filtration repair guide.
FAQ
Frequently asked questions
How much does a whole house water filtration system cost?
How much does it cost to install a whole house water filter?
How much do whole house filter replacements cost per year?
Is whole home water filtration worth it?
How much does a well water filtration system cost?
How much does whole house reverse osmosis cost?
Sources
- Angi, How Much Does a Water Treatment System Cost? (updated Sep 2026)
- HomeGuide, How Much Does a Home Water Filtration System Cost? (Sep 2025)
- Angi, Water Softener System Installation Cost
- CDC, About Choosing Home Water Filters
- CDC, Guidelines for Testing Well Water
- U.S. EPA, Consumer Confidence Reports
- NSF, Water Filters FAQs
- Connecticut Department of Public Health, Ultraviolet Radiation Treatment of Private Drinking Water Systems
Cost figures are national estimates published by Angi and HomeGuide. Filtiva does not sell or install filtration systems and has not hands-on tested the products mentioned.