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The cracks are already starting to appear.

On the same day Donald Trump took the oath of office, a six-foot wall bearing his surname was mysteriously damaged in Brighton Beach. Hopefully, it’s not an ill omen, a manager for the cooperative housing development said.

“The irony is not lost on me,” said Igor Oberman, general manager of Trump Village West, who confirmed the crack appeared today. “I certainly, as a proud American, hope that this is not going to show how the administration will be run.”

The wall — built by The Donald’s developer dad Fred in the 1960s — separates a W. Fifth Street parking lot from Trump Village Shopping Center, where developer Cammeby’s International plans to erect a 40-story residential tower and retail center. National Grid is also doing work in the area to clean up toxic sludge left behind by a gas plant that once operated near the lot.

The ongoing construction is negatively impacting residents’ quality of life — and likely to blame for the crack, according to another Trump Village manager.

“They have this thing, I don’t know exactly what it’s doing, it’s just pulverizing or digging but banging into the ground. It’s really loud, it shakes,” said Chris McCreight. “Residents told me on the 16th and 17th floors, they can feel vibrations.”

The state’s Department of Environmental Conservation is overseeing National Gird as it performs the clean-up work, according to a spokeswoman from National Grid.

Contractors are monitoring the noise and vibrations, said a Cammeby’s International spokeswoman.

“The construction team is currently driving piles to prepare the foundation for the new building that will be constructed on the site. This process will occur on and off over the next couple of months. To ensure that it is completed with the utmost attention to safety, air quality and vibrations are being vigorously monitored,” said developer rep Christa Segalini.

Reach reporter Julianne Cuba at (718) 260–4577 or by e-mail at jcuba @cngl ocal.com . Follow her on Twitter @julcuba.