Renton, King County
A fitted stainless cap on a Renton chimney runs $265 to $850. At $265 you are looking at a single ordinary flue on a roof we can walk. A cap that spans two or three flues, or one fabricated to an odd crown, is what reaches $850. We measure the flue tile and the crown before ordering anything, since a cap that almost fits will rattle loose in the first winter gale.
Typical investment
$265–$850
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 Renton home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Renton homes.
Level 1 review of the accessible parts, stepped up to a Level 2 camera pass when those parts cannot settle the question
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The flue brushed along its full height with heads chosen for its shape and material
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An assessment in photos that tells weathering apart from structural failure
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Video scan and measurement of the flue before a liner is specified
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Burner, pilot assembly and igniter cleaned and tested
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Photos of the crown and of all four faces before work begins
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
Renton's wind has a direction. WeatherSpark finds it blowing most often from the south for nearly ten months of the year, and the city's hazard plan says seasonal storms bring damaging gusts and falling trees. Rain driven sideways gets past a missing or undersized lid easily. Homes among the tall firs the same plan describes face a second problem: needles and cones drop straight into an open flue.
Only about three in ten Renton housing units, 30.8 percent in the American Community Survey, have been built since 2000. The rest are older, and HistoryLink points to a city of roughly 50,000 at the turn of the century that had been barely more than 1,000 at incorporation in 1901.
Decades of ownership leave chimneys altered. A wide clay flue may now hold a narrow stainless liner for an insert, with open space around it at the top. That gap needs a top plate and a cap built for a lined flue, not the slip-in cap sold for bare tile. We look down the flue before quoting so the cap matches what is really there.
Every chimney cap installation we do in Renton includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowIn its September 2026 release on heating fires, the State Fire Marshal's office puts a chimney cap on the same list as a yearly cleaning. In Renton the reasons are practical. Water running down an open flue rusts the damper and soaks the smoke shelf. Birds and squirrels treat an uncapped tile as a nest box. And the mesh sides of a cap hold back embers, which matters on streets the city's plan places in the wildland-urban interface.
Outside dimensions of each flue tile, plus the crown, tell us which mounting style will hold.
Single-flue or multi-flue, with a mesh opening sized so the flue can still breathe freely.
Clamp screws or masonry anchors, depending on the tile, tightened so wind cannot work it loose.
A quick check at the firebox makes sure the new cap has not restricted the flue.
What this work is quoted at for Renton homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Renton | What that covers |
|---|---|---|
| Chimney Cap Installation | $265–$850 | Stainless cap fitted; multi-flue and custom at the top |
| Chimney Sweep | $189–$459 | 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 $375 | Masonry repair — brick and mortar, scoped after diagnosis |
Ranges are what these jobs are quoted at in Renton. 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.
Spark arrestors and rain caps on masonry chimneys each get a paragraph in Washington's residential code (R1003.9.2 for the first, R1003.9.3 for the second). Both carry one piece of arithmetic: the open area left around the device has to be, at minimum, fourfold the flue outlet's own net free area.
In practice that rules out the low, tight lids that look tidy and choke a fireplace. The code edition is the 2021 one, in effect since March 15, 2024 according to the State Building Code Council. We note the flue's inside dimensions on the quote so the calculation can be checked by anyone.
Renton is a city of 24 square miles at the south end of Lake Washington, incorporated in 1901, on Lake Washington, with homes with a median build year of 1988, more than a third of them built from the 1940s through the 1970s. We work every part of it — the Highlands, Kennydale, Benson Hill, Talbot Hill, Earlington, North Renton included.
RentonKing County, WA · 47.483, -122.217
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.
$265 to $850 with us. Number of flues, cap size and roof steepness decide where a job falls. The price is fixed in writing once the flue has been measured.
Not when the cap is sized correctly. The state code sets a minimum open area for exactly that reason, and we pick caps that exceed it.
Measuring is done during the $99 plus tax inspection. Order the cap from that quote and the $99 is credited against it.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
