After years of controversy over the construction of a 6,500-square-foot house next door, a plan is afoot to protect the Truro, Mass., summer house that once belonged to artist Edward Hopper. Built by Hopper and his wife Josephine in 1934, the 800-sq.-ft. white Cape house is on a bluff overlooking Cape Cod Bay. Hopper often painted the hilly landscape covered with low bushes stunted by salty winds. The current owners, a New Jersey family, will not be opening the property for public use or access.