General contractor Tom Silva shows host Kevin O'Connor the progress on the new utility trench - a time-consuming and expensive undertaking that (with several thousand dollars in permit fees) has already eaten up $30,000 of the budget. Concrete cutting contractor Peter Dami is on site to make way for the final connections, using a diamond plated coring drill to bore holes through the 10" foundation wall. Kevin finally meets the most important person on the job -homeowner Janet Bernard's mom, Jacqueline Buckley, who will actually live in the cottage with her husband Len. Plumbing and heating expert Richard Trethewey takes Kevin to visit master carpenter Norm Abram at the New Yankee Workshop to see how the shop is heated and cooled - he's thinking of using some of the same solutions (radiant heat, baseboard, and/or split system A/C) at the Concord cottage. Looking for an interior designer who knows how to work with small spaces, Kevin meets Tricia McDonagh in Boston's South End to see how