Remodeling - November 1993 Merit Awards, Studio Addition, Rockport, MA Adding onto old houses can be tricky, especially when previous additions have produced a jumble of rooflines where the proposed addition meets the house. That was the challenge of this 177-square-foot garden studio at the rear of a 290-year-old colonial home. Rather than mimicking details of the original, the designers used a new form - a hexagon. Then they related the $30,000 room to the existing house by borrowing from its trim details. A short passage-way connects the new room to the house. It hides the awkward spot where a shed-roofed, turn-of-the-century sun room connects to an original rear ell. Category: Residential remodeling, up to $75,000 Entrant: Luna Design Group, Lynnfield, MA Contractor: Dick Higgins & Murray Hart, Higgins & Hart Construction Co., Gloucester, MA Architect: Joseph L. Luna, AIA, Luna Design Group