Sink installation costs depend on the type of sink, the material, and the labor. This guide can help you budget for your project—from pedestal to farmhouse.
Thomas M.
Very well. Have already used them again to fix hot water heater
Service OlympiansHow Much Does It Cost to Install an Under-Sink Water Filter? [2026 Data]
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Cost Insights:
Professional under-sink water filter installation ranges from $100 to $3,000 depending on your chosen filter type and system complexity.
The filter type you select determines your total cost, with sediment filters costing less and reverse osmosis systems requiring higher investment.
Water testing costs between $10 and $400 to identify contaminants, and replacement filters cost $15 to $300 depending on your system type.
Hiring a local water softener repair professional ensures your filtration system is properly installed and protects your household from waterborne contaminants.
The average cost to install an under-sink water filter is $550, though you can spend between $100 and $3,000, depending on your needs. Under-sink water filters are more cost-effective than whole-house water filtration systems, and can provide similar water filtration results. However, they only serve a single faucet location. Learn the cost factors that will impact what you pay for an under-sink water filter.
Under-Sink Water Filter Cost Factors
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The type and size of the under-sink water filtration system you choose will have the biggest impact on its price. However, several other factors will also figure into the calculation.
Types
Many types of water filters exist. The most common under-sink varieties include carbon, multi-stage, reverse osmosis (RO), and systems that combine more than one type of filtration in the same unit. For example, many carbon filters come with a sediment filter as a first stage, while many RO systems include one or more stages of carbon filtration.
Reverse osmosis systems cost more to purchase and install than the other types, while ion exchange units act as point-of-use water softeners and cost less to install. UV light systems often involve other filtration methods before the UV purification happens, which can significantly increase their installation cost.
| Filter Type | Average Cost Range |
|---|---|
| Sediment | $100–$300 |
| Carbon | $200–$600 |
| Multi-stage | $200–$1,200 |
| Ion exchange | $100–$350 |
| Ceramic | $200–$700 |
| Reverse osmosis | $300–$2,000 |
| UV light | $500–$3,000 |
Capacity
The amount of water you need per minute will affect the cost of your under-sink water filtration system. Water flow measurements are in gallons per minute or GPM. Common GPM rates for residential water filters are between 0.5 and 2.5.
GPM rates can be somewhat deceptive. The higher the flow rate, the less filtration the water undergoes. Under-sink RO systems tend to have lower flow rates, but a high level of filtration.
| Flow Rate | Average Minimum Cost |
|---|---|
| 0.5 | $400 |
| 1.0 | $300 |
| 1.5 | $200 |
| 2.0 | $150 |
| 2.5 | $50 |
Included Supplies
Many under-sink water filters come with everything you need to tap into your home's plumbing and start enjoying filtered water. On the other hand, many systems come only as the filter housing. This means that in addition to the housing and connections, you'll have to purchase the faucet and sometimes the filters to complete your system, which will add to the installation costs.
Labor
A plumber can install an under-sink water filter, as well as help you decide which system is best for your needs based on your family's consumption and the quality of your water. Plumbers cost between $45 and $200 per hour for installations and other work, which will affect the cost of installing your system.
Prep
Understanding the current quality of your home's water is essential to help you choose the best under-sink water filtration system for your needs. Expect to spend between $10 and $400 on water testing, depending on whether you choose a DIY kit or have water samples sent to a lab for deeper analysis.
Location
Where you live can impact the total installation cost for your under-sink water filter system. Expect to spend more to cover the cost of labor in locations where the cost of living is high and less in other areas. Additionally, because you're installing a plumbing fixture, some municipalities will require a plumbing permit for an under-sink system, which will include a minor fee.
Under-Sink Water Filter Ongoing Costs
Installing an under-sink water filter isn't a one-and-done cost. There are a couple of things to consider regarding ongoing expenses.
Maintenance
Virtually all under-sink water filter systems require regular filter changes and upkeep to function properly. Under-sink water filter replacements cost between $15 and $300 each, and replacements are necessary every six months to five years, depending on the filter type and how often you use your system.
Operating Costs
Not all under-sink water filter systems require electricity. However, many RO systems and all UV light systems will require at least a small amount of it. While the cost is minimal, you may notice a small increase in your monthly electric bill.
Why You Should Hire an Under-Sink Water Filter Installation Pro
Working with a pro is always a good idea when installing an under-sink water filtration system. While this job can be completed yourself, the relatively low cost and superior end results mean it’s always worth hiring a local water softener professional for help. These experts charge between $45 and $200 per hour, but the peace of mind that your filtration system is properly installed is more than worth the investment.
Here’s why it’s ideal to hire an under-sink water filtration pro
Working with a professional to install an under-sink water filter has many benefits, including:
Ensuring code compliance
Peace of mind from water leaks and other plumbing issues
Help running electricity to the filter, if necessary
Ensuring the filter is working correctly and protecting you from waterborne contaminants
Complete the installation in a fraction of the time it would take to do by yourself
Cost of Common Under-Sink Water Filter Add-Ons
While you're hiring a professional for your under-sink water filter installation, it's a good time to knock off a few more items from your to-do list.
Water softener installation cost: $200–$6,000
Plumbing inspection cost: $100–$500
Plumbing repair cost: $175–$450
Tips to Reduce Cost While Installing an Under-Sink Water Filter
It's true that you can save money, at least in the short term, by installing your own under-sink water filter system. However, that's not the best option for every homeowner. Despite their smaller size compared to whole-house systems, they're still complex appliances that require precise installations, and working with plumbing and sometimes electrical isn't for everybody.
The best way to manage costs when installing an under-sink water filter system is to test your home's water quality and what's in it, and work with a professional to find the most cost-effective way to treat the specific impurities that exist in your water.
Next Steps: Finalize Your Project With a Pro
Ask your pro to do a water test to determine the best type of filter for your area
Get your expert’s opinion on the filter capacity your household needs
See if your installation pro offers ongoing maintenance for your filter
Consider bundling this job with other tasks, such as a plumbing inspection or water softener installation
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Frequently Asked Questions
Water softener services reviews from real Angi homeowners in Columbus, OH
5.0★ avg. • 6 total reviews
- Mike Z.
As usual with ECO, tech Jordan was outstanding, very professional, very knowledgeable, and very thorough with repairs made to tankless water heaters. Very highly recommend ECO!!!
Eco Plumbers, Electricians, and HVAC Technicians - Michael S.
Did a great job replacing the ice maker and water regulator on my refrigerator. He was quick and thorough, very friendly and professional. If I needed a heart transplant I'd want him to do it!!!
- Maria C.
We had a gutter blockage that was causing water to sheet down the side of the house and ultimately it started to come in at a window (need mortar people next). Called around 7:30am, and he responded by 8am. He was able to come out the same morning and do a look over and clean out. He also...
- Brad S.
Scott checked our large crawl space for mold and water infiltration and recommended a viable solution. The crew was efficient and they cleaned up well after the job. The job was expensive but I am confident that I won't have to deal with the problem again. Highly recommend.
AdvantaClean of Dublin - Ann S.
They were the most through inspecting the water system in my house. Even going the extra mile to get the water professionally tested for contamination.
Hague Water Conditioning, Inc. - Diane C.
It went very well. The drain is absorbing all the access water. I had other estimates a year earlier and Hughes was right on. I will use them, again.
Hughes Construction Co - Service Olympians
- Mike B.
The Paul Davis team was very professional and went the extra mile to take care of my water damage. The work was very high quality and done in a timely manner. I would highly recommend their services.
Paul Davis Restoration - Gene S.
Honesty is hard to find in business today. GBR met me today at a 3 story building regarding my being told that I needed to tuckpoint the brick because of water leaks. The owners took the time to evaluate the situation and advised me that I did not need their service at all. They pointed me...
GBR Masonry Inc - Stewart W.
They unclogged the drain and sent me a bill for more than 4 times what I paid before. I called the Water Works to ask why the bill was so high and that they should have gotten my authorization before assuming they could make expensive decisions like that on my behalf and for their benefit....
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