This season, THIS OLD HOUSE updates an 1887 Victorian-era two family house in Cambridge, Massachusetts, that homeowners John and Sally hope to turn into a one-family home. Landscape contractor Roger Cook finds a few surprises in the yard, plumbing and heating expert Richard Trethewey uses an eye-opening energy audit to demonstrate the need for efficiency upgrades, and general contractor Tom Silva brings in a deconstruction expert to remove all of the old and unneeded house parts. In the second half of the hour, Tom kicks off the 11th season of ASK THIS OLD HOUSE by helping a couple transform stock shelving into a custom built-in. Then, Richard installs a new washing machine valve that will prevent flooding.