Water Heater Installation in Seattle, WA: Replaced Complete, Permitted and Strapped
Done Right Plumbing replaces water heaters across Seattle, from the ramblers of Haller Lake and Bitter Lake to the condos of Greenwood and Ballard, usually the same day you call. Every install is complete: the permit Seattle now requires for every replacement, both seismic straps, a pan and relief discharge, an expansion tank, and the old tank hauled away.
Real Work in Seattle
In April, Jeremy replaced a worn-out electric tank in the garage of a Haller Lake home, a few blocks from the lake between Aurora and I-5. The old fifty-gallon Bradford White had been built in 2010; it was still standing after sixteen years, but a tank that age in this city is living on its steel. Jeremy set a new fifty-gallon Bradford White electric on the same spot, on a new base, with a new expansion tank above it, both straps anchored into the framing, the relief valve piped down toward the floor, new supply connectors and the electrical whip reconnected, and the install date written on the service sticker. Earlier in the year Samuel and Joseph T. did the same job for a fifty-gallon electric in a Greenwood condo, where the closet had to be measured before the new tank was ordered and the building's shared shutoff valves planned around. The two jobs are the two halves of Seattle water heater work: a garage with room to move, and a hallway closet where turning off the water affects the neighbors.
What We Install in Seattle
Electric tank water heaters
The most common replacement inside the city: Seattle runs on City Light power, and a large share of its houses and most of its condos have no gas line to the closet. We install Bradford White, A. O. Smith and Rheem tanks in forty and fifty gallon sizes, complete with new supply lines, a pan and drain where one can be run, both straps and the expansion tank.
Gas tank water heaters
Atmospheric and power-vent units for the houses on Puget Sound Energy gas, most often in a basement or a garage. In a pre-war house the venting decides it: an old masonry chimney or a shared flue has to be checked before a new atmospheric unit goes on it, and a power-vent unit through the wall is sometimes the better answer.
Heat pump water heaters
The efficient choice on City Light power. Seattle City Light pays a $750 rebate when an eligible residential customer installs a qualifying ENERGY STAR Tier 3 or Tier 4 heat pump water heater, one rebate per customer. They need air and a condensate drain, which suits a Seattle basement or garage and not a hall closet, so we look at the space first.
Tankless water heaters
For households that want endless hot water and the closet back. Gas line size, venting and the electrical service decide whether an older Seattle house can take one without a larger project, and we say so up front; our tankless water heater page covers the trade-offs.
The code items that make it complete
King County's installation standard spells out what a finished water heater looks like, and every one of ours meets it: two 20-gauge seismic straps, one on the upper third of the tank and one on the lower third, an expansion tank on a closed system, the relief valve piped to an approved termination, and at least two feet of clear access to the unit. We add a pan with a drain wherever a leak would otherwise reach the floor.
What Makes a Seattle Water Heater Job Different
Every replacement now needs a permit
Plumbing permits in Seattle come from Public Health Seattle & King County, not the city's building department, and since July 1, 2026 Public Health has required a permit for every replacement water heater, including a like-for-like swap that used to go in without one. For a simple replacement it is an over-the-counter plumbing permit, the installation is inspected, and the contractor is expected to pull it. We do, with the fee in the quote.
Very soft water, longer-lived tanks
Seattle Public Utilities delivers some of the softest water of any American city, from the Cedar and South Fork Tolt watersheds, typically one to two grains per gallon. Sediment barely builds up, so tanks here rarely die of scale; they die of age, when the steel behind the glass lining finally gives out. That is why the two tanks we replaced in the city this year, built in 2010 and 2014, had both outlasted the ten-year rule of thumb, and why the anode rod matters more here than an annual flush.
Garages in the north end, closets in the condos
North of 85th, in Haller Lake, Bitter Lake, Broadview and Northgate, the heater usually lives in a garage or a basement with room to work. In Greenwood, Phinney Ridge, Ballard, Fremont and Wallingford, and in the condo buildings along Aurora and Greenwood Avenue, it lives in a hallway or laundry closet on a finished floor, sometimes upstairs. That closet install is where the pan, its drain and the relief discharge earn their place, because a slow leak there has nowhere to go but the carpet or the unit below.
Shared shutoffs in condo buildings
In many Seattle condo buildings one shutoff valve controls the water to a whole stack of units, and it may sit under a neighbor's bathroom sink. Replacing a heater in a building like that means finding the right valve, telling the people it affects, and keeping the water off for as short a time as possible. We plan that before the crew arrives, which is why the Greenwood job started with a measuring visit.
Our Process
1. Send a photo of the label
A picture of the old heater and its rating plate tells us the fuel, the size, the venting and what has to change to bring the install up to the current standard. For a condo, a photo of the closet opening helps too.
2. Same day when it has failed
A leaking or dead tank goes to the top of the board. Our shop is in Lynnwood and the common electric and gas sizes ride on the truck, so a morning call from north Seattle is usually a hot shower by evening.
3. Pull the Public Health permit
The over-the-counter plumbing permit for a replacement, with the fee in the quote and the inspection scheduled by us, plus a separate gas piping permit if the gas line has to change.
4. Install it complete
Straps, expansion tank, pan and drain, relief discharge, new supply lines and shutoff, and a stand or platform where the location calls for one.
5. Leave it documented
The old unit goes with us, the service sticker gets dated, and the inspection closes the permit so the record of the work stays with the house.
FAQs About Water Heater Installation in Seattle
Do I need a permit to replace a water heater in Seattle?
Yes. Since July 1, 2026, Public Health Seattle & King County requires a plumbing permit for every replacement water heater in Seattle, including a like-for-like swap, and the installation is inspected. For a straight replacement it is an over-the-counter permit the installing contractor is expected to obtain. We pull it, include the fee in the quote and schedule the inspection.
What does a water heater replacement cost in Seattle?
For a like-for-like tank replacement, forty or fifty gallons, our recent installs around the region have landed between $2,600 and $3,600 including the code items, the permit and disposal, and Seattle jobs tend toward the top of that range. A tankless changeover runs two to three times that. Fuel, venting and the old setup's condition move the number.
Should I replace my Seattle water heater with gas or electric?
Usually with what you have. An electric heater in a house or condo without a gas line stays electric, and a heat pump unit is the upgrade path there, with City Light's $750 rebate. A gas heater with sound venting stays gas. Switching fuels means a new circuit or gas line and permit, priced separately.
My condo's shutoff valve serves other units. How do you handle that?
We find the right valve before the day of the job, tell the neighbors it affects when the water goes off, and stage the tank and fittings so the water is off as briefly as possible. The Greenwood condo job this winter started that way, with a measuring visit and a look at which valve fed the unit.
How quickly can you get to Seattle from your Lynnwood shop?
Our shop is on 204th Street SW in Lynnwood, straight down I-5 from the north end. Haller Lake, Bitter Lake, Northgate, Greenwood and Ballard are usually twenty to thirty minutes away outside rush hour, and West Seattle or the south end somewhat longer. A failed heater is a same-day call, and the common sizes are already on the truck.
Serving Seattle from Our Lynnwood Shop
Seattle is the busiest city on our board, and most of that work is in the north end, a straight run down I-5 from our shop on 204th Street SW. The north-end neighborhoods are routine; West Seattle, Beacon Hill and Columbia City are regular, with a slightly longer arrival window. The common tanks ride on the truck, which is what makes same-day replacement a real offer inside the city.
Why Seattle Homeowners Choose Done Right
We treat a water heater as an installation rather than a delivery. The permit, the straps, the expansion tank and the pan are part of the job, not extras that appear when the inspector does, and every one of them is listed on the invoice. The technician who quotes the work is on the crew that does it, with no subcontractors, and our two-year installation warranty sits on top of whatever the manufacturer offers on the tank.
Licensed, Bonded & Insured
WA Contractor License #DONERRP852N5
Done Right Plumbing is fully licensed, bonded and insured in Washington State, family-owned and serving the greater Seattle area since 2011. Your Seattle water heater is installed by a Done Right crew from the quote through the Public Health inspection.
Call for a Seattle Water Heater Estimate
Rust at the base, showers that run lukewarm, or a tank past its tenth birthday? Call for a free estimate, or request a callback and we will reach you at a time that works.