PORTLAND — A house in an affluent southwestern Portland neighborhood broke free of its foundation Wednesday, slid at least 100 feet down a hillside and slammed into two other houses.

Slope House steps down a hillside. The project encompasses 200 square metres, and was completed last year. "As a conceptual strategy for the project, ...

One hillside house began sliding last weekend and, as of Friday, was almost halfway down the hill and falling apart. More houses in the area are at risk. Watch NBC Bay Area News 📺 Streaming ...