Myth # 81: Thomas Jefferson invented triple-sash windows when he was in France to avoid the French door tax.
Virginia Mizel, Director of the Edmondston-Alston House in Charleston, SC, asked: “Was there ever a door tax in the South as there was in France? We have heard Thomas Jefferson invented the triple sash window to avoid a door tax while he was ambassador to France. Some southern tour guides state the door tax was also in place in here, which is why many homes from the 1800s have triple sash exterior windows serving as both door and window.”
Thomas Jefferson is credited with many inventions, but the folks at Monticello have been able to identify only one: a moldboard plow. He did not invent the triple-sash window. The original sash window originated in the 1600s. Jefferson did incorporate triple-sash windows on the first floor of his home, Monticello. These could be opened like a window or used as a door. (Another problem with the statement is that, although Jefferson did live in France for several years, he did not build any houses there.)
So any relevance to French door taxes is moot. If there were a tax on doors in France, would someone please let us know? I have it on good authority that there is no such tax today.
As for door taxes in America, see Myth #1 on closet taxes, #11 on wardrobe taxes, #30 on mirror taxes, #75 on window taxes, and #78 on second-story taxes. If any tour guide mentions a door tax, ask him/her to specify the colony or state and point to the legislation. I cannot find any examples.