Sidewalks and Curb damage

I have been trying to get my sidewalk repaired for two years. The response has been asphalt patching. I want to take down the diseased maple tree which caused the sidewalk to buckle, and replace the sidewalk w new cement. I want to then plant a new tree. The sidewalk across the street was replaced, and looks great. I want tom improve my home, and getting rid of patched ugly sections outside my front door would be terrific. I even offered to do the work. I just need permission to remove the tree!