Milligan said the year her guest cottage was remodeled — 1975 — her neighborhood was zoned R-2, allowing duplexes. The year she bought the house — 1976 — the area was rezoned single-family residential. Her unit, she said, should at least be grandfathered in. Milligan said the complaint filed with the city came from the mother of a disgruntled tenant who lives in another part of the state. Neighbors have not complained. "I was told by Ms. Burgess I had to get a demolition permit and have it taken out."