It’s houses like this renovated two-family brick townhouse at 213 29th Street in lovely Greenwood, Brooklyn, that make us stop and think about the current real estate market. The home is asking $2.5 million. Sure, it’s a 2,379-square-foot townhouse–bigger than most apartments. And there are four bedrooms if you count the rental unit, though most of them are pretty small–and there’s that rental income, of course. But though Greenwood is a solid choice for townhouse living, a 17-foot-wide, three-story house is a tough sell in any neighborhood–and a two-and-a-half million dollar property is a tough sell in this one. Also: The house has no cellar (less storage and other downsides). But it’s awfully cute. And the crazy thing about home buyers is that it only takes one.