Water Heaters in King County — Install, Repair & Replace
No hot water? Leaking tank? Ready for an upgrade? Lighthouse Plumbing provides complete water heater services across King County—from emergency repairs to new installations. We work on all types: traditional tank, tankless, electric, gas, and energy-efficient heat pump systems.
Same-day service or $200 off.
If we can't get to your home within 4 hours of your call, we'll take $200 off your invoice.
What We Install
From traditional tank heaters to high-efficiency heat pumps, we install every major water heater type for King County homes.
Traditional Tank Water Heaters
The reliable choice for most King County homes. We install 40-, 50-, and 75-gallon tank water heaters from trusted manufacturers. Most installations complete in 4–6 hours.
Best for: Families with 2–4 bathrooms, homes with steady hot water demand, budget-conscious homeowners.
Tankless Water Heaters
Endless hot water on demand. Tankless units heat water only when you need it—eliminating standby energy loss and freeing up floor space. They last 20+ years (vs. 10–12 for tanks) and can cut water heating costs by 20–30%.
Best for: Homes with high hot water demand, small utility spaces, homeowners planning to stay long-term.
Heat Pump Water Heaters (Hybrid)
The most energy-efficient option available. Heat pump water heaters pull warmth from surrounding air, using 2–3x less electricity than standard electric tanks. PSE customers can claim up to $1,100 in rebates.
Best for: Homeowners with electric water heating, garages or utility rooms with adequate airflow, eco-conscious households.
Electric Water Heaters
Professional installation for homes without gas service. Electric tank and tankless options available. We ensure proper electrical connections, verify circuit capacity, and handle any necessary upgrades.
Best for: Homes without natural gas service.
Gas Water Heaters
Efficient and cost-effective hot water for homes with natural gas. We handle gas line connections, venting requirements, and all code compliance. Gas tankless units are among the most powerful options for high-demand households.
Best for: Homes with natural gas service, especially high-demand households.
PSE Rebate: Up to $1,100
Puget Sound Energy offers rebates for ENERGY STAR heat pump water heaters replacing electric resistance or gas units. Check PSE rebate eligibility.
Recent Tankless Installation in Duvall
We completed a tankless water heater installation in Duvall—from call to complete in just 36 hours. Our customer Jason left us a 5-star review:
"Reasonable price. Daniel did a great job replacing the tankless water heater. Thank you."Read the Full Story →
Water Heater Repair Services
When your water heater acts up, we diagnose and fix the problem fast. Our technicians repair all makes and models—tank, tankless, gas, and electric.
No Hot Water or Inconsistent Temperature
Whether it's a failed heating element, faulty thermostat, or gas valve issue, we'll identify the cause and restore reliable hot water.
Tank Leaks
Leaking water heaters can cause significant damage. We locate the source—pressure relief valve, drain valve, or tank corrosion—and repair or recommend replacement if needed.
Strange Noises
Banging, popping, or hissing sounds often indicate sediment buildup. We flush the tank and address internal issues to eliminate the noise.
Pilot Light Problems
For gas water heaters, a faulty pilot light or ignition system means no hot water. We troubleshoot thermocouple, gas valve, and ignition issues.
Anode Rod Replacement
The sacrificial anode rod protects your tank from corrosion. We inspect and replace worn rods to extend your water heater's life—especially important in soft-water areas like Bellevue and Kirkland.
Maintenance & Tune-Ups
Annual maintenance extends your water heater's lifespan and catches problems before they become emergencies. Our tune-ups include flushing sediment, inspecting the anode rod, checking the pressure relief valve, and verifying proper operation.
Signs You Need Water Heater Service
- No hot water — The most obvious sign something's wrong
- Water not hot enough — Thermostat issues, sediment buildup, or undersized unit
- Rusty or discolored water — Tank corrosion or failing anode rod
- Leaking around the base — Tank failure or valve problems
- Strange noises — Sediment buildup causing overheating
- Age 10–12+ years — Most tank water heaters need replacement by this point
- Frequent repairs — When repair costs add up, replacement makes more sense
- Higher energy bills — Efficiency drops as water heaters age
Our Process
1. Diagnose
We assess your current system, discuss your household's hot water needs, and identify the best solution—whether that's a repair or replacement.
2. Quote
You get a clear, written estimate before we start. No surprises, no hidden fees. We explain all your options so you can make an informed decision.
3. Install
Most water heater replacements complete in one day. We remove your old unit, install the new one, test everything, and clean up. You'll have hot water before we leave.
4. Warranty
All installations include manufacturer warranty plus our workmanship guarantee. We stand behind our work and are here if you ever have questions.
Same-Day Service Guarantee
If we're not on-site within 4 hours, $200 off your invoice.
When your water heater fails, you need help fast—not tomorrow, not next week. We prioritize water heater emergencies because we know cold showers and potential water damage don't wait. Call us and we'll be there.
Recent Water Heater Work
Bellevue — Water Heater Installation
When Michael in Bellevue needed water heater work, Bradyn, Brandon, and Beau handled it—identifying the quirks of his older home's setup and leaving the piping better than they found it.
"Bradyn and Beau were super easy to work with and did a great job. Brandon very easily identified the quirks of our setup and knew exactly how to manage them. They made a point of leaving the water heater piping better than when they found it." — Michael ⭐⭐⭐⭐⭐
Service: Water Heater Installation | Date: February 2026
Read the Full Story →Duvall — Tankless Water Heater Installation
Jason called about a tankless replacement. Daniel had the job complete in 36 hours—call to finish.
"Reasonable price. Daniel did a great job replacing the tankless water heater. Thank you." — Jason ⭐⭐⭐⭐⭐
Service: Tankless Water Heater Installation | Date: January 2026
Read the Full Story →Water Heater Service Areas
We serve homeowners throughout King County from our Fall City shop.
We also serve Issaquah, Kirkland, Redmond, Sammamish, Snoqualmie, Woodinville, Bothell, Carnation, and surrounding King County communities.
Don't see your city? Call us — we likely serve your area.
Why Choose Lighthouse Plumbing for Water Heaters?
- Same-Day Service Guarantee — We prioritize water heater calls because we know you need hot water now, not next week.
- Experienced Technicians — Our licensed plumbers have installed and repaired thousands of water heaters across King County.
- Transparent Pricing — You get a detailed quote before we start. The price we quote is the price you pay.
- Quality Products — We install professional-grade water heaters from trusted manufacturers.
- 12-Year Workmanship Warranty — We stand behind our installations.
- Local & Family-Owned — We're your neighbors, not a franchise.
Frequently Asked Questions
How much does a new water heater cost in King County?
Water heater costs depend on the type and size. Traditional 50-gallon tank water heaters typically run $1,200–$2,500 installed. Tankless units range $2,500–$4,500 installed. Heat pump water heaters cost $2,800–$4,000 installed, but PSE rebates of up to $1,100 can offset that significantly. We provide detailed quotes before any work begins.
How long does water heater installation take?
Most tank water heater replacements take 4–6 hours. Tankless installations may take a full day if gas line or electrical upgrades are needed. We'll give you a time estimate when we quote the job.
Do I need a permit to replace my water heater?
Yes. King County cities require permits for water heater replacement. Lighthouse Plumbing pulls all necessary permits and schedules inspections—it's included in our service. Permit requirements vary by city (Bellevue, Kirkland, Issaquah, etc. each have their own building departments).
Should I repair or replace my water heater?
General rule: if your water heater is under 8 years old and the repair is under $500, repair usually makes sense. If it's over 10 years old or needs frequent repairs, replacement is typically the better investment. We'll give you an honest recommendation based on your specific situation.
Tank or tankless—which is better?
It depends on your household. Tankless costs more upfront but lasts longer and saves energy. Tank heaters have lower initial costs and work well for most families. We'll help you weigh the pros and cons based on your home's hot water demand, available space, and budget.
What brands do you install?
We install quality water heaters from manufacturers including Rheem, AO Smith, Bradford White, Navien, Rinnai, and others. We'll recommend the best option for your needs and budget—not push whatever has the highest margin.
Ready for Hot Water You Can Count On?
Whether you need a quick repair or a complete water heater replacement, Lighthouse Plumbing is here to help. Same-day service, transparent pricing, and work we stand behind.