Legal Question in Real Estate Law in California

The general American law is that there is no legal right to a view. Some governments have modified that principle. You would have to look at your own city and county laws to see what rights you have. You might be able to get them to limit the height but not remove the trees entirely. Talk to yuo nelighbor and see if some compromise can be worked out. Perhaps they felt you could look directly into their bedroom window or that the trees are needed to prevent mud slids.

Mr. Shers' advice is good. It's largely a local matter, and unless there is a local ordinance protecting views, there is no right to demand that a neighbor maintain it for you. However, many localities do have view-protection ordinances, including for example Oakland and the County of Contra Costa. I believe. but I'm not certain, there is such an ordinance covering the unincorporated areas of L.A. County and or the City of Los Angeles, but am not sure about Grenada Hills. You can probably check local ordinances on the Web.