You need a special contractor, and structural insulated panels for walls/floors. That said, the total man-hours of labor are probably less, and according to tim

You need a special contractor, and structural insulated panels for walls/floors. That said, the total man-hours of labor are probably less, and according to timber-framing contractors I've spoken with over the past three years, the price gap is now less than 10% more than traditional stick-built.