"A Mansion" on the Hill is a song written by Hank Williams and Fred Rose and originally recorded by Williams on MGM Records. It peaked at #12 on the country singles chart in 1948.

The details surrounding the origins of "A Mansion on the Hill" are ambiguous. For many years, an apocryphal tale circulated that after meeting Hank Williams and hearing his compositions, Fred Rose was so impressed that he could hardly believe that the unknown singer from Alabama could have written so many quality songs by himself, so he tested Hank by giving him the title "A Mansion on the Hill" to write a song around, which Hank did in a side room. In an interview years after Hank's death, his ex-wife Audrey claimed to have had a hand in writing the song herself:

Part of the reason why Williams had difficulty with "A Mansion on the Hill" might have been that he did not write narrative ballads, his best songs freezing a moment, a feeling, or a grudge in time. He wound up adapting the melody for the song from Bob Wills' 1938 recording of "I Wonder If You Feel the Way I Do." The song was recorded in Nashville at Castle Studio on November 7, 1947, with Rose producing. The players included Jerry Byrd (steel guitar), Robert "Chubby" Wise (fiddle), Zeke Turner (lead guitar), probably Louis Innis (bass) and either Owen Bradley or Rose on piano. It was released in December 1948 and peaked at #12.

...
Wikipedia