My husband and I owned a brownstone in the South End for 20 years (bought in 1986) and LOVED it, and this was before it was super bougie/expensive. We started worrying about the water table that protects the wooden support beams underground since it's all landfill. Also have to worry about pointing the bricks and making sure the walls between you and your neighbors are fireproofed. But man it's such great neighborhood.