20 years building underground maze of natural-light tunnel homes by Kirsten Dirksen on November 9, 2025 Twenty years ago, Zach and Allison Anderson began digging into a hillside on their property in Grass Valley, California, to …
He created prefab kit to self-build underground homes on a budget by Kirsten Dirksen on October 5, 2025 Dave has spent the past decade refining ways to build affordable underground homes. We last visited him to see his …
