By Alex West The famed Playboy mansion is being renovated, and partially rebuilt, on the same property. The gorgeous grotto and backyard where Hugh Hefner thew some of the best parties in Los Angeles will be home to a mostly new mansion to restore the land to its former glory. The construction process hasn’t been easy as it’s taken over four years to complete — and still counting. In fact, the property was purchased about seven years ago. Architect Richard Landry was tasked with completely redoing the home with a $10million renovation. It’s set to include some aspects of the original with a bi…