A leaking chimney is the single most common call we get in Seattle, and no wonder — with the rain this region gets, any weak point at the top of a chimney will find water. Leaks can come from the crown, cap, flashing, or the brick itself, so the first job is finding the real source. Once we know where the water gets in, the fix ranges from a simple seal to repairing the damage a long-ignored leak already caused.
What chimney leak repair costs in Seattle
Diagnosis and a minor seal — sealing a small crack, resealing flashing, or waterproofing brick — runs about $299–$800. A major leak with water damage, where wet brick, a failed crown, or rotted framing has to be repaired, runs $800–$3,000. We find the true source first and quote it in writing, with a price-match plus 10–25%.
Signs your chimney is leaking
- Water stains on the ceiling or wall around the chimney.
- A damp, musty smell in the firebox after rain.
- White efflorescence or crumbling mortar on the brick.
- Dripping or pooling water inside the fireplace.
- Peeling paint or wallpaper near the chimney breast.
Why chimneys leak so often here
Puget Sound simply gets more rain than most chimneys were built to shrug off. Wind-driven rain finds cracked crowns, tired flashing, and porous brick. Freeze-thaw in the colder months widens every crack, and moss on shaded roofs holds moisture against the masonry for days. Many older King, Pierce, and Snohomish county homes have chimneys that were never waterproofed — so the brick soaks up water like a sponge.
A small seal now vs. a big repair later
The reason we hunt down the source first is simple: a $299–$800 seal today is a fraction of the $800–$3,000 repair once water has been getting into the brick and framing for a season. Ignored leaks rot roof decking and destroy liners. We give a free written quote, a free second opinion if another company already looked, and we never pad the job.
What Chimney Leak Repair Costs in Seattle (2026)
Real 2026 ranges for the Seattle–Tacoma–Everett area, with a free written quote before any work begins.
| Diagnosis & minor seal | $299–$800 |
| Major leak / water-damage repair | $800–$3,000 |
Get a free quote
See our full chimney service pricing, or learn more about Chimney Leak Repair. You get a free written quote before any work begins — call 206-453-2045 or request your free quote online.