Edgewater is an architecturally significant, early 19th-century house located near the hamlet of Barrytown in Dutchess County, New York, United States.

Writing in 1942, the historians Eberlein and Hubbard described Edgewater as an exemplar of "the combined dignity and subtle grace that marked the houses of the Federal Era.

[7] In 1824, possibly as a belated wedding gift, John R. Livingston (1755-1851) gave the 250-acre Edgewater property to his daughter and son-in-law, and the house may have been built about that time.

[9] Donaldson engaged the architect Alexander Jackson Davis (1803–1892) to add an octagonal library wing, and to clad the brick house with stucco textured to resemble brownstone.

In July 1906, her brother, the artist Robert Winthrop Chanler, was living there when lightning struck a nearby elm tree, causing a fire within the house that was quickly extinguished.

[19] It is unlikely, however, that he spent much time there during the next twenty years: The day before the sale, Chapman left Harvard College in order to join the Navy, in which he served until at least April 1920.

[22][23] In England, on August 25, 1937, Chapman married Judith Daphne Kemp (1906–1999),[24][25] who according to their son: ...was English-born and had been what the English call a governess in her early adult years.

[27] According to Chapman's son, "We had a nice townhouse on Beacon Hill in Boston, smack in the middle of the city; one block below the famous Louisburg Square.

[36] In November 1966, Vidal, now living in Italy, rented Edgewater to William vanden Heuvel (1930–2021), a lawyer, aide to Robert F. Kennedy, and husband of the writer Jean Stein (1934–2017).

Jenrette wrote about these additions in his memoir, Adventures with Old Houses: In recent years, I've begun making more of my own architectural imprint on the Edgewater property.

Designed by Michael Dwyer of New York, the guest house is a small Grecian temple with four columns of the Doric order framing a large porch looking downriver.