In all, the work is expected to cost $1.7 million, the records show.

A video posted on TikTok earlier this week showed workers at the home loading wood into an area of the home that was already under construction.

A few commenters offered guesses about what Swift may be doing with the extra space.

“She’s installing the Eras Tour stage, per my request,” quipped one.

Wrote another: “She’s finally getting my guest room ready!”

Property records show the 12,657-square-foot, 1904 mansion, which has sweeping views of the Block Island Sound and a private pool, already boasts seven bedrooms and nine bathrooms.

Swift snagged the mansion in 2013 for approximately $17.75 million – reportedly paying for the property in cash. Records show the home now has an assessed value of about $20.67 million.

Over the years, Swift has hosted numerous summer parties and getaways for her circle of celebrity friends at the home. She welcomed Blake Lively, Ryan Reynolds, Bradley Cooper, and her boyfriend, Travis Kelce, to name a few, this past summer.

Swift has also given Holiday House her signature songwriting treatment.

For 2020’s “Folklore,” she penned, “The Last Great American Dynasty,” which details the home’s storied past with previous owner Rebekah Harkness, a mid-century heiress who married William Hale Harkness, a Standard Oil heir.

Not unlike Swift, Harkness was known for throwing lavish parties, sometimes drawing the ire of locals. It’s a comparison Swift – who faced some criticism herself, such as when she posted “No Tressing” signs around her property and some beach barricades after moving in – invites in the song.

“Fifty years is a long time/ Holiday House sat quietly on that beach/ Free of women with madness, their men and bad habits/ And then it was bought by me,” she sings. “Who knows, if I never showed up, what could’ve been/ There goes the loudest woman this town has ever seen/ I had a marvelous time ruining everything.”

Christopher Gavin can be reached at christopher.gavin@globe.com.