Chimney Waterproofing cost · Renton & South King County, WA
$320–$795
What we charge for chimney waterproofing.
We charge $320–$795 for chimney waterproofing in Renton and South King County. Breathable sealer — reapplied every 3–5 years in this climate. The exact figure is set in writing after the $99 plus tax inspection, credited toward an approved quote, and you approve it before any work starts.
What the price includes
What we charge for each service. Chimney Waterproofing is highlighted.
| Service | What we charge | Typical South King County price | When you need it |
|---|---|---|---|
| Chimney Sweep | $189–$459 | $70–$350 | Annual maintenance, or you burn regularly and it has been a year |
| Chimney Inspection | $99 plus tax | $121–$855 | Buying or selling a house, after a chimney fire, or before a new appliance |
| Chimney Relining | From $1,900 | no South King County data published | Cracked clay liner, an unlined chimney, or fitting a stove or insert |
| Chimney Repair | From $375 | $111–$3,000 | Cracked bricks, open mortar joints, a leaning or spalling stack |
| Chimney Cap Installation | $265–$850 | $149–$349 | Missing or rusted cap, rain or animals getting into the flue |
| Masonry Repair (Crown / Repointing) | From $425 | $150–$300 | Cracked or crumbling crown, failing mortar joints across the stack |
| Chimney Waterproofing | $320–$795 | no South King County data published | White staining on the brick, or damp showing inside |
| Chimney Flashing Repair | $330–$1,500 | $300–$400 | Water stains on the ceiling around the chimney |
| Gas Fireplace Service | $189–$475 | no South King County data published | Annual service, or the unit will not light or stay lit |
| Creosote Removal | From $245 | no South King County data published | Several seasons since the last sweep, or a hard glaze in the flue |
| Dryer Vent Cleaning | $105–$259 | $129–$199 | Clothes need two cycles, or it has been over a year |
| Air Duct Cleaning | From $535 | $388–$450 | After a renovation, or after water damage |
Market rates observed in South King County (King County, WA), surveyed October 4, 2026 — not our quote. Sources: Chimcare — Chimney Sweep in Snoqualmie, WA, Chimcare — Local Chimney Sweep and Cleaning in Kent, WA, Chimney 360 Services — Chimney Sweep in Maple Valley, Chimney 360 Services — Chimney Sweep in Renton, Chimneyz LLC — Chimney Sweep Kent, WA, Homeyou — Air Duct Cleaning in Renton, WA costs, Homeyou — Chimney Repair in Maple Valley, WA costs, Homeyou — Chimney Repair in Renton, WA costs, Homeyou — Chimney Repair in Snoqualmie, WA costs, Homeyou — Chimney Sweeping in Renton, WA costs, Homeyou — Fireplace Repair in Renton, WA costs.
Published by others — not our quote
No company outside our network publishes a price for this job in Renton, Newcastle, Snoqualmie or Maple Valley that we could find, so the figures below are national ones. Not our quote.
$150–$500 per chimney
US national · Not our quote
Sealing/waterproofing a chimney, national.
Every figure below is published by a third party. Not our quote.
A typical job, at our prices
A job at the bottom of our listed price for chimney waterproofing — yours is set in writing after the inspection.
| Step | Cost |
|---|---|
| On-site inspectionPaid at the visit, credited toward the quote once you approve it | $99 |
| The chimney waterproofing itselfBalance due after the inspection credit | $221 |
The total came to $320 before sales tax — our listed starting price for chimney waterproofing, with the inspection counted inside it, not on top.
No Renton or southeast King County price for chimney waterproofing was found from a company outside our network, so we publish national figures only, not our quote: Fixr — Chimney Repair Cost: $150–$500 per chimney (US national, accessed 2026-10-04). Not our quote — what we charge is shown at the top of this page.
Under the 2021 Washington State Residential Code (R1003.9), a chimney must extend at least 2 feet higher than any part of a building within 10 feet and at least 3 feet above the highest point where it passes through the roof. Masonry chimneys need a sloped concrete, metal or stone cap with a drip edge and a caulked bond break around flue liners (R1003.9.1, ASTM C1283).
Common questions
The exact price for your chimney is set on site, in writing, after the $99 plus tax inspection. Our FAQ covers booking, the inspection and where we work.
Book your inspection — $99 plus tax on-site inspection, credited toward an approved quote.
Book an inspection
Book your $99 inspection
$99 plus tax, deducted when you approve the repair
