Michael Jackson - Owners Of Michael Jackson Death House Sue Map Seller

Hubert and Roxanne Guez claim Linda Welton's booming streetside map business is stopping them from selling the North Carolwood Drive home.

In court documents obtained by Tmz.com, they write, "Potential buyers are bothered upon approach by the quite visible and annoying constant illegal stopping and/or parking of cars in front of the home on what otherwise would be a quiet residential street."

The Guezes claim the property value has plummeted because of the stream of traffic, Welton's lawn chair, coolers and large patio umbrella, and the illegally parked cars. They also allege Linda is violating the law by essentially having a newsstand on a street corner.

But the map seller insists her mother has already won a lawsuit giving her the right to sell the maps.