Mad Hatter Chimney Sweep Seattle, WA not only cleans! With Mad Hatter you not only get quality service, bonded, insured and licensed master sweeps. You also get peace of mind, free masonry estimates. Chimney cleaning prices starting at just $289.95 Mad Hatter can also repair your chimney, install chimney caps, full service masonry work, clean and de-critter dryer vents.