How do you establish $ for chlorine gas destruction of property?

Trees include native dogwoods 35+ cherry, apple, maple,locust, well over 30 years old. Minimum of 16yr old azaleas,rhododendrons, mountain laurels, Japanese maple, frazier furs, douglas fir, black balsam, as well as spruce. ground cover= snow on the mountain and periwinkle. A huge burning bush with much sentimental value. All the evergreens are already dead, the azaleas, and rho dos are as well.