Bellevue, King County
Waterproofing a chimney in Bellevue costs $285–$795, depending on the height of the stack, how much brick is exposed above the roof and whether the surface needs cleaning first. We use a breathable, vapor-permeable repellent: it keeps rain from soaking in while letting moisture already inside the brick escape. Sealing the brick shut with a paint-like coating would trap it.
Typical investment
$285–$795
Book an inspection
Book your $99 inspection
$99 plus tax, deducted when you approve the repair
Not sure where to start
Pick what you're seeing at your Bellevue home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Bellevue 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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Cleaning of the burner, pilot and valve assembly
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
The chimneys that benefit most in Bellevue are exterior brick stacks on detached homes, the kind that run up the outside wall in neighborhoods like Newport, Somerset and Woodridge. With one face toward the weather and no eaves over it, that brick takes rain from October into spring. Interior chimneys that only show a few courses above the roof need less product and sit at the low end of the price.
The Bellevue Downtown Association and the city both describe a downtown that has more than doubled in population since 2010, now roughly 15,657 residents. Where their fireplaces are direct-vent gas units, the vent is a sealed metal pipe running out through a wall or the roof.
There is no masonry there for a repellent to protect, so we do not offer waterproofing to tower residents. This service is for the brick chimneys on Bellevue's detached houses.
Every chimney waterproofing we do in Bellevue includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowWaterproofing only works on masonry that is already sound. A repellent will not bridge a cracked crown, fill an open joint or stop a leak at the flashing, and we will not sell it as if it could. When those problems are present, we say so in the quote and treat the brick only after they are fixed. On a stack in good shape, it is the step that keeps it that way.
The Seattle fault runs under Bellevue, and the regional survey after the 2001 Nisqually quake found damage in 1,556 of about 60,000 chimneys, concentrated along the fault's strands.
A repellent does nothing for a crack. If the chimney has been through felt shaking since it was last looked at, CSIA's guidance is a Level 2 inspection, and we want its findings before any brick gets sealed, so a hidden crack is repaired rather than coated over.
We check that crown, joints and flashing are sound. If they are not, the quote says so and waterproofing waits for the repair.
Moss, soot staining and loose material are removed so the repellent reaches the brick itself.
The repellent goes on in dry weather, in two coats, with the roof and siding masked.
You get photos and a note of the product used, so a later inspection can tell how the treatment is holding up.
What this work is quoted at for Bellevue homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Bellevue | What that covers |
|---|---|---|
| Chimney Waterproofing | $285–$795 | Breathable sealer — reapplied every 3–5 years in this climate |
| 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 Bellevue. 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.
Rainfall here builds through the fall to a November peak, and the dry spell does not arrive until July. Across western Washington, December and January bring measurable precipitation on 20 to 25 days a month or more, and relative humidity in January sits between roughly 78 and 87 percent.
Brick left to absorb that year after year starts to spall and lose its mortar. CSIA lists a water repellent among four low-cost steps against water damage, which it calls a bigger threat to masonry chimneys than fire.
Bellevue is the Eastside's largest city and a major regional job center between Lake Washington and Lake Sammamish, on Lake Washington, with a mix of mid-century neighborhoods, older established homes and dense new construction downtown. We work every part of it — Downtown, Crossroads, Factoria, Newport, Somerset, Bridle Trails included.
BellevueKing County, WA · 47.610, -122.201
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.
$285–$795. A short interior stack is at the low end; a tall exterior brick chimney that needs cleaning first is toward the top.
It needs dry brick and a dry day to go on well, so we schedule it from late spring to early fall. A leak in winter usually points to flashing or the crown anyway.
Only if the water is soaking through the brick itself. Leaks just as often start at the flashing or a cracked crown, and those need repair, not repellent.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
