Duvall, King County
For a Duvall house, air duct cleaning has a $525 floor. What lifts the figure: square footage, how many supply and return runs there are, and whether we reach the ducts through a crawl space or an attic. Registers get counted and trunk lines examined before a price is confirmed, so the quote matches the system you actually have.
Typical investment
From $525
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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 Duvall home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Duvall homes.
A Level 1 check, or a Level 2 with a camera run through the flue when the visible parts are not enough
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Brushing of the whole flue, top to firebox, with brush heads sized to the liner
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A photographed assessment that separates cosmetic wear from structural damage
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A camera run and full measurements before any liner is ordered
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Measurement of each flue, or of the full crown for a multi-flue cap
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Cleaning and testing of the burner, the pilot assembly and the ignition
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
By Census estimate, six in ten occupied Duvall homes heat mainly with utility gas, and roughly a third with electricity. Much of the housing dates from two building waves: about 46.6 percent of units from the 1980s and 1990s, and 49.2 percent from 2000 onward. Where a house from the first wave has ducted heating, those ducts have been collecting dust for thirty to forty years.
Not many Duvall homes heat primarily with wood: the Census puts it at 4.5 percent, or 125 households, and warns through its margin of error (±113) that the true number could be far smaller or nearly double. The survey counts main fuel only, so a stove used on weekends does not register.
Any regular wood fire puts fine ash into room air each time the stove door opens or the ash pan is emptied. The State Fire Marshal's advice for ashes is a metal container with a tight lid, kept outside. What escapes indoors is drawn into the return ducts with the rest of the household dust, which is a reason to look inside the returns of a home that burns wood.
Every air duct cleaning we do in Duvall includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowSummer adds a second load. Wildfire season, the regional Clean Air Agency reminds residents, falls in the warm and dry part of the year. Its advice for smoke episodes: HEPA filtration, a MERV-13 filter strapped to a box fan, and a single sealed room kept as the household's clean room. King County's public health department says a smoke plume can degrade air for a few days or for weeks. Fine ash that gets past the filter settles in the returns, and it stays there until someone takes it out.
A Stage 1 ban idles open fireplaces and uncertified wood devices; Stage 2 idles the certified ones and pellet stoves too. Both are called by the regional Clean Air Agency for the whole of King County, Duvall included, and the only way to keep burning is an exemption granted in advance to homes with no other adequate heat.
For everyone else, ban days are furnace days. The forced-air system that sat half-used behind the wood stove suddenly runs around the clock, pushing whatever is in the ducts into every room. Cleaning them before winter means the backup heat is clean heat.
Registers are counted, the furnace is located and access points on the trunk are chosen.
A large collector is connected near the furnace so loosened dust is drawn to one point.
Starting from the farthest register, tools drive debris back to the collector, branch after branch.
Access openings are sealed, registers refitted, and interior photos are sent to you.
What this work is quoted at for Duvall homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Duvall | What that covers |
|---|---|---|
| Air Duct Cleaning | From $525 | Whole HVAC system — trunks, branches and every register |
| 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 $1,900 | 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 Duvall. 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.
Duvall is a hillside town above the Snoqualmie River, incorporated in 1913, with homes with a median build year of 2000, almost all of them built since 1980. We work every part of it — Old Town, the upper plateau included.
DuvallKing County, WA · 47.742, -121.986
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.
The base is $525. Larger homes, two systems or difficult access raise it. The register count on your quote shows how the figure was built.
If smoke was heavy and the system ran, it is a reasonable time. The governor's August 1, 2026 declaration covered all of Washington: wildfire emergency, plus a burn ban that ran to September 30, so the question is a timely one this fall.
Yes: furnaces, air conditioners and heat pumps appear with a Yes on Duvall's Permit Required list. Cleaning existing ducts is maintenance and involves no permit.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
