Barely bigger than a shed, a 70-year-old cottage on a South End corner lot is for sale for $2 million.

“I can’t believe it,” said Ruth Griffin, a Portsmouth resident since 1938.

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The sale is really about the 0.34-acre lot which has frontage on Marcy, Pray and Partridge streets, said broker Liz Levey-Pruyn, from Remax Shoreline. But the little building, which someone now calls home, will have to be reviewed by the Historic District Commission if a buyer plans any change.

“You can’t just take it down, or move it,” Levey-Pruyn said.

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Listed locally, as well as in The New York Times and Boston Globe, the property is described as “the last large lot available in Portsmouth’s Historic and highly sought-after South End.” The listing, which went to market last week, notes the property includes, “the infamous candy store cottage.”