Eastside Repipe and Plumbing
Verified Pro
1½+ years online5.0(64)
Water Treatment & Softeners in Bellevue, WA
Compare 34 water treatment & softeners contractors near you in Bellevue and surrounding area with an average rating of 4.7/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 23, 2026
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Verified Pro Installers
Other Businesses in This Area
PureSpring Water Softeners & Filters
~3 years onlineSpring Aqua
18 years onlineHydroFLOW USA
5.015½+ years onlineKaizen Plumbing & Sewer, Bellevue
5.0Pure Water Northwest
5.010½+ years onlineSeattle Heating & Cooling
5.020+ years onlineSweetwater LLC
5.0~22 years onlineWashington Water Heaters
5.023½+ years online2 Sons Plumbing, Sewer, Septic, Electric, Heating & Air
4.98½+ years onlineAlcorn Pump & Water Filtration
4.97½+ years onlineCustom Pure -The Water Store
4.9~28 years onlineEastside Plumbing, Sewer, Septic, Electric, Heating & Air - Issaquah
4.927+ years onlineEco Electric, Plumbing, Heating and Air
4.98½+ years onlineReady Rooter
4.93½+ years onlineClayton Aquarium Corporation
4.826½+ years onlineGreen House Plumbing and Heating
4.814 years onlinePure Water NorthWest
4.810½+ years onlineRoto-Rooter Plumbing & Water Cleanup
4.8~29 years onlineOutToday Electrical, Heating, Plumbing, and Air
4.726+ years onlinePurified Water
4.47½+ years onlineREI
4.430+ years onlineIndia Metro Hypermarket
4.3Pacific Plumbing Supply Company LLC - Bellevue Branch
4.3~29 years onlineHD Fowler Company
4.230½+ years onlineWater Treatment & Softeners in Nearby WA Cities
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About Water Treatment & Softeners in Bellevue
Water treatment covers filtration, softening, and purification systems for homes and businesses. Common solutions include whole-home water softeners, reverse osmosis drinking water systems, and iron/sulfur filters. The right system depends on your water source and specific contaminants.
Typical costs: Under-sink reverse osmosis systems run $300–$800 installed. Whole-home water softeners are $1,500–$4,000. Iron filters and multi-stage whole-home systems are $2,000–$6,000+.
Common projects include:
- Whole-home water softener installation
- Reverse osmosis drinking water system
- Iron and sulfur filtration
- UV water purification
- Well water treatment systems
Water treatment installations that modify plumbing may require plumbing permits. Well water systems may need additional environmental or health department approval.
Frequently Asked Questions
- How much does water treatment & softeners cost in Bellevue?
- An under-sink reverse osmosis system runs $300–$800 installed. A standard water softener is $1,500–$4,000 including installation and plumbing connections. Well water treatment systems with multiple stages (sediment, iron, softener, UV) can run $3,000–$8,000. Annual maintenance (filters, salt) is $100–$300.
- How do I find a reliable water treatment & softeners contractor in Bellevue?
- Start with a water test — a good installer will test your water before recommending a system. Ask about ongoing maintenance costs (filter replacements, salt, UV bulb changes). The cheapest system isn't the best deal if filters cost $200 every 6 months.
- Do I need a permit for water treatment & softeners in Bellevue?
- Simple point-of-use filters don't need permits. Whole-home systems that tie into the main water line may require a plumbing permit. Well water treatment systems may need health department review in some areas.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across Bellevue and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.