Chimney Waterproofing cost · South Seattle, WA
$285–$795
What we charge for chimney waterproofing.
Elsewhere in South Seattle it typically runs $200–$500. Market rates observed in South Seattle (King County, WA), surveyed October 4, 2026 — not our quote.
We charge $285–$795 for chimney waterproofing in South Seattle. 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 Seattle price | When you need it |
|---|---|---|---|
| Chimney Sweep | $189–$449 | $70–$871 | Annual maintenance, or you burn regularly and it has been a year |
| Chimney Inspection | $99 plus tax | $114–$803 | Buying or selling a house, after a chimney fire, or before a new appliance |
| Chimney Relining | From $1,900 | $1,200–$4,000 | Cracked clay liner, an unlined chimney, or fitting a stove or insert |
| Chimney Repair | From $425 | $114–$3,000 | Cracked bricks, open mortar joints, a leaning or spalling stack |
| Chimney Cap Installation | $235–$850 | $200–$500 | Missing or rusted cap, rain or animals getting into the flue |
| Masonry Repair (Crown / Repointing) | From $475 | $150–$3,000 | Cracked or crumbling crown, failing mortar joints across the stack |
| Chimney Waterproofing | $285–$795 | $200–$500 | White staining on the brick, or damp showing inside |
| Chimney Flashing Repair | $325–$1,500 | $300–$800 | Water stains on the ceiling around the chimney |
| Gas Fireplace Service | $189–$425 | $150–$275 | Annual service, or the unit will not light or stay lit |
| Creosote Removal | From $245 | $300–$600 | Several seasons since the last sweep, or a hard glaze in the flue |
| Dryer Vent Cleaning | $105–$259 | $89–$422 | Clothes need two cycles, or it has been over a year |
| Air Duct Cleaning | From $525 | no South Seattle data published | After a renovation, or after water damage |
Market rates observed in South Seattle (King County, WA), surveyed October 4, 2026 — not our quote. Sources: Homeyou — Chimney Cleaning in Seattle, WA costs, Homeyou — Chimney Repair in Seattle, WA costs, Homeyou — Chimney Sweeping in Seattle, WA costs, Homeyou — Dryer Vent Cleaning in Seattle, WA costs, Homeyou — Fireplace Repair in Seattle, WA costs, Jason L. Chimney Co. — Chimney Sweep Cost in Seattle, 2026 Pricing Guide, Mad Hatter Chimney Sweep — Chimney Cap Installation, Mad Hatter Chimney Sweep — Chimney Liner Installation, Mad Hatter Chimney Sweep — Chimney Repair, Mad Hatter Chimney Sweep — Chimney Sweep Cost Seattle, Mad Hatter Chimney Sweep — Chimney Waterproofing, StarDucts — What does a typical dryer vent cleaning cost in Seattle?.
Published by others — not our quote
Figures published by other companies and cost guides, local first, national for context. Not our quote.
$200–$500 per chimney
Seattle proper · Not our quote
Seattle company's price for a water-repellent application, said to last 5–10 years with reapplication every 5–7; masonry defects are to be fixed first, at separate cost. Undated.
$150–$500 per chimney
US national · Not our quote
National guide's 'sealing' line item (updated 03/12/2026).
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 | $186 |
The total came to $285 before sales tax — our listed starting price for chimney waterproofing, with the inspection counted inside it, not on top.
Published figures, not our quote: Mad Hatter Chimney Sweep — Chimney Waterproofing: $200–$500 per chimney (Seattle proper, accessed 2026-10-04); This Old House — How Much Does 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 R1003.9.1 a masonry chimney needs a cap of concrete, metal or stone, pitched to drain, fitted with a drip edge, and isolated from the flue liners by a caulked bond break. If a spark arrestor is added (R1003.9.2), the arrestor's net free area has to be four times the flue outlet or more, the screen must match 19-gage galvanized or 24-gage stainless steel for heat and corrosion resistance, and openings must stop a 1/2-inch sphere while passing a 3/8-inch one.
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
