Plumbing · Mercer Island, WA
Tankless Water Heater Install in Mercer Island, WA
On-demand hot water with proper gas and venting.
Tankless Water Heater Install in Mercer Island, WA
Looking for tankless water heater install in Mercer Island? Xion Build is a licensed, bonded, and insured plumbing contractor delivering standout results for Mercer Island homeowners — start to finish, under one roof. On-demand hot water with proper gas and venting.
Mercer Island projects often involve sloped lots, shoreline rules, and mid-century homes that benefit from thoughtful structural and design planning.
From re-piping and tankless water heaters to fixtures, drain lines, and radiant heat, we coordinate rough-in with tile and cabinetry so everything lands where the design intends.
What's included in your tankless water heater install
A typical tankless water heater install in Mercer Island can involve water heater, shutoffs, supply lines, fixtures — and we put the full scope in writing so you know exactly what's covered before work starts.
Good plumbing is invisible — proper slope, venting, and access prevent the leaks, clogs, and water damage that show up years later.
How much does a tankless water heater install cost in Mercer Island?
Most tankless water heater install projects in Mercer Island fall between $4,600 – $10,500, depending on the size of the space, the finishes you choose, and the condition of what's already there.
Because every home is different, we don't quote final numbers sight unseen. After a free in-home consultation you get a detailed, itemized estimate tied to your actual plumbing project — so there are no surprises later.
Why Mercer Island homeowners choose Xion Build
Meticulous job sites and clear daily communication, with respect for your home, your time, and your neighbors.
One dedicated point of contact coordinates the entire job, so you're never chasing subcontractors or wondering who's responsible.
Local crews who know Eastside permitting, inspections, and the way Pacific Northwest weather tests a home.
Our Mercer Island plumbing process
Each phase is inspected and documented, and we keep you updated so you always know what's happening and what's next.
It starts with a free, no-obligation consultation: what you want, the constraints, and a realistic budget range before you commit to anything.
Handoff includes a detailed walkthrough and a written warranty — not a crew that vanishes the moment the dust settles.
Frequently asked questions
How much does a tankless water heater install cost in Mercer Island?
Most tankless water heater install projects in Mercer Island run $4,600 – $10,500, depending on scope, finishes, and existing conditions. After a free in-home consultation we provide a detailed written estimate so your Mercer Island price reflects the actual project — not a guess.
Do you offer a tankless water heater install in Mercer Island, WA?
Yes. On-demand hot water with proper gas and venting. Xion Build is a licensed, bonded, and insured plumbing contractor serving Mercer Island and the surrounding WA communities.
Do you offer free estimates for tankless water heater install near Mercer Island?
Absolutely. We provide free, no-obligation in-home estimates throughout Mercer Island and the greater Eastside, with transparent, itemized pricing.
Do you handle permits and inspections?
Yes. We manage permit applications, schedule inspections, and coordinate any required engineering so the work passes cleanly in Mercer Island.
What should we decide before starting a tankless water heater install?
Your budget range, must-haves, timeline, and any finishes you already love. For plumbing work we also review access, existing conditions, and whether permits are required in Mercer Island.
Related services in Mercer Island
Fixture & faucet installation
Faucets, toilets, and fixtures installed and sealed.
View detailsLeak detection & repair
Locate and repair hidden supply and drain leaks.
View detailsWhole-home re-piping
Replace failing galvanized or polybutylene with PEX or copper.
View detailsPressure-reducing valve & repiping
PRVs and supply upgrades to fix pressure problems.
View detailsWe also serve these areas