Chimney caps are the workhorse of the rooftop: They help exhaust smoke and prevent downdrafts; they keep water at bay; they protect the chimney's brickwork and they ward off critters like birds, ...
The typical range for chimney cap costs is $75 to $1,000 with a national average of $300. Cost factors for chimney cap installation can include material, size, shape, type, labor, and seasonality.