
There are perhaps three dozen of them, and most people who live in Boston have walked past one without realizing what they were looking at. Beacon Hill's carriage houses — the low, often two-story structures originally built in the early-to-mid 1800s to stable horses and house staff for the great Mt. Vernon Street and Chestnut Street mansions — are now the rarest single-family asset class in the city. They trade infrequently, command prices that look insane on a per-square-foot basis, and operate under a layer of regulation that scares off all but the most committed buyers. They are also, for the right client, the most distinctive home you can own east of Manhattan.










