For the first time in likely 40 years, Fosselman’s Ice Cream Co. in Alhambra is set to close for four days next week for construction.

The popular ice cream shop is set to close Monday through Thursday to update its look in preparation for the shop’s 100th year in 2019, said co-owner John Fosselman.

Fosselman said the style will be “less Formica, less granite and more wood” to give the shop a more 1940s vibe, given that the shop moved to its Main Street location in 1941.

“It’ll have a similar sense of who we are, but it will definitely feel updated,” Fosselman said. “We’re going to clean it up without losing the nostalgia pieces.”

Fosselman’s began with grandfather Christian Fosselman in Waverly, Iowa nearly a century ago. The family eventually moved to Los Angeles, with a wholesale business in Pasadena and storefronts and production facilities in Pasadena, South Pasadena, Highland Park and Glendale in addition to Alhambra.

The Alhambra location, however, is the last shop standing. John Fosselman and his brother, Chris Fosselman, have run the shop for 30 years and co-owned it for 20, and it has never undergone a face lift in that time, John Fosselman said.

While some locals may not immediately support a change in look for the iconic shop, John Fosselman said he hopes people will approve of the look being updated from its current 1970s design.

“Most kids coming in couldn’t even fathom what the ’70s was like,” John Fosselman said with a laugh. “Our customers will be the judge, and I hope they come out and give it a look.”

Regardless whether all the construction is done, the ice cream shop will reopen at its usual 10 a.m. time Friday, Sept. 28.

John Fosselman said the 100th year celebration will begin Jan. 1 and involve specials throughout the year that will be announced through the shop’s social media pages.