Photos and Story by Lissa Alexander The concept for Dave Olsen’s dream house was born out of a disaster. The Cob house that he and his 13-year-old daughter Anicca now live in sits atop a craggy hilltop on Lasqueti Island. It is 900 square feet, built with sand, clay and straw. Lasqueti is off-grid, which means there’s no BC Hydro or other public utilities that take care of your water or sewage. Life is simpler on Lasqueti, and that’s why Olsen has spent the last 18 years there. Not only has Olsen built his home and the other structures on…