Miriam and Alba, who live in the town of Teruel, only have access to the outside by way of specially-designed elevator attached to their home, The Local.es reported.
"We can go out onto the street, and we can go wherever we please and so we can have a dignified life," the sisters said.
However, one of their neighbors complained about the elevator, saying it blocked his view and cast a shadow on his terrace. A judge sided with the neighbor and ordered Miriam and Alba to demolish the elevator.
The sisters said: "I think its not fair that they give more importance to some shadows than to our lift."
The neighbor won't budge on the issue, so the sisters are hoping to use social pressure to get him to change his mind; they have collected 50,000 signatures to block demolition.