Mercer Island, King County
Gas fireplace service on Mercer Island costs $169 to $475, depending on the unit and what the visit turns up. A routine tune-up covers the burner, pilot assembly, glass and venting. If a part has failed, you get the diagnosis and a written price for the repair before we order anything.
Typical investment
$169–$475
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$99 plus tax, deducted when you approve the repair
Not sure where to start
Pick what you're seeing at your Mercer Island home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Mercer Island homes.
Level 1 or Level 2 inspection, with a camera scan where warranted
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Complete sweep of the flue and firebox, protected by drop cloths and HEPA filtration
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Restoration of brick, mortar joints and firebox
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A stainless-steel or ceramic liner run the full height of the flue
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A stainless cap fitted to your flue's exact dimensions
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Crown recast — or rebuilt outright where the damage demands it
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
Many island homes have had a gas unit added to an older fireplace, or a direct-vent fireplace built into a remodel. A direct-vent unit pulls its combustion air from outdoors and sends exhaust back out through a sealed pipe, either sideways through a wall or up through the roof. That sealed path is what keeps combustion gases out of the room, so it deserves as much attention as the flame.
Mercer Island sits entirely within Lake Washington; King County's page on the lake notes it is the biggest of the county's three major lakes, and roughly half of the city's area is open water.
Across the western part of the state, WRCC's climate narrative says the hardest winds generally come from southerly and southwesterly directions late in the fall and through winter. Wall-mounted vent caps on those faces take the brunt of it, so we check that yours is secure and its guard is intact.
According to OSU Extension, moss follows shade and moisture, and WSU Extension reports it grows through every season except summer when surfaces stay wet. A roof-terminated gas vent under overhanging branches sits in exactly those conditions.
Debris and growth around a vent top can block the exhaust or the intake of a direct-vent unit. When we service a fireplace with a roof termination, we look at the top as well as the firebox and flag any branches worth cutting back.
Every gas fireplace service we do in Mercer Island includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowThe complaints we hear most are a pilot that will not stay lit, a flame that has gone lazy or sooty, and glass that clouds over within weeks. Some are simple cleaning. Others trace back to the vent: a termination cap blocked by nesting or debris, or a joint in the vent pipe that has come apart. We check both before calling it done.
Mercer Island's city government reports that two or more strands of the Seattle fault cross the island. For chimneys damaged by an earthquake, FEMA's recovery advisory favors rebuilding in light-frame construction with a metal flue or an insert rather than relying on repointing the old masonry.
If your gas insert vents through an old masonry chimney, the liner and connections inside it are worth checking after any noticeable shaking. CSIA recommends a Level 2 inspection after a seismic event and whenever an appliance or fuel is changed.
Gas is turned off at the unit, the glass comes off, and the logs are lifted out so the burner and pilot can be reached and cleaned.
We clear dust and debris from the burner ports and pilot, clean the glass, and look for corroded parts, damaged gaskets or loose connections.
The vent pipe and its termination are checked from inside and out. On a wall vent we look at the cap; on a roof vent we look at the top and its flashing.
With everything back in place, we relight the unit, check ignition and flame pattern, and set it so it burns clean. Any repair is quoted in writing.
January mornings in western Washington average around 87 percent relative humidity, easing to about 78 percent by late afternoon, the Western Regional Climate Center reports, and the rainy stretch lasts from October through winter.
A gas fireplace that sits unused from spring to fall in that climate can come back with corrosion on the burner or pilot and a vent cap that lets water in. CSIA's water guidance applies to the chimney around an insert as well: a cap and sound flashing keep rain from reaching the unit.
What this work is quoted at for Mercer Island homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Mercer Island | What that covers |
|---|---|---|
| Gas Fireplace Service | $169–$475 | Annual service and tune-up; repairs quoted after diagnosis |
| Chimney Sweep | $189–$449 | Full flue swept, Level 1 inspection included |
| Chimney Inspection | $99 plus tax | Level 1 visual; Level 2 adds a full camera scan |
| Chimney Relining | From $1,895 | Full-length stainless liner, sized to the appliance |
| Chimney Repair | From $425 | Masonry repair — brick and mortar, scoped after diagnosis |
Ranges are what these jobs are quoted at in Mercer Island. The exact figure is set on site after a $99 inspection (credited toward the job if you go ahead), and you approve it before any work starts.
Mercer Island is an island city in the middle of Lake Washington, on Lake Washington, with mid-century and high-value waterfront homes.
Mercer IslandKing County, WA · 47.571, -122.222
Before and after
Illustrations of what each repair changes on a typical chimney — not photos of a specific job.
Before
After
Before
After
Before
After
Four steps, each one on paper — so you always know what happens next.
Choose a genuine opening on the crew's calendar. Confirmation is immediate.
Liner, crown, cap, flashing and masonry examined in order — each finding photographed.
One document, plain numbers, covering only the work your chimney genuinely needs.
The repair is completed, then handed over with before-and-after photos of every item.
$169 to $475. A straightforward cleaning and tune-up is at the lower end; a longer visit with diagnosis on an older or harder-to-reach unit is at the higher end. Parts for a repair are quoted separately.
Yes. The national standard for chimneys and vents, NFPA 211, sets a once-a-year inspection, and a gas vent is covered by it just as a masonry flue is. A yearly service also catches a failing thermocouple before it leaves you without a fire.
The Puget Sound Clean Air Agency's burn ban rules are written around wood and pellet burning: Stage 1 covers wood-burning fireplaces and uncertified stoves and inserts, and Stage 2 extends to certified wood devices and pellet stoves. The agency posts current status online and on its line, 800-595-4341, if you want to confirm.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
