Elon Musk’s enormous, newly installed, highly lit ‘X’ sign was taken down by San Francisco officials because it broke permission regulations.

The social media behemoth, formerly known as Twitter, was under investigation after Musk put the obnoxious sign without first getting approval from the San Francisco Department of Buildings, causing neighbours to complain.

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Just over 48 hours after it was built, workmen today took down the huge X logo on the roof of the company’s headquarters in San Francisco, California.

They were seen scaling the luminous sign – which sat on top of the building – before removing it piece by piece.

Friday, shortly after the sign was put up, investigators showed up at the scene to inform the business that it was in breach of the city’s building rules and to ask access to the roof to evaluate it, declaring it to be “possibly unsafe.”

According to a local complaint, a Twitter representative claimed to have informed the inspector that the sign was a “temporary lighted sign for an event.”

On Saturday, an inspector attempted to enter once more, but “access was denied by tenant upon arrival.”

In a statement, Patrick Hannan, spokesman for the San Francisco Department of construction Inspection, said: “A construction permit is necessary to ensure that the sign is structurally sound and affixed safely.

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The installation of this sign also requires planning review and approval, according to the statement.

He added to the Washington Post that the city needs a permission to accept additional letters or symbols on a sign in order to maintain “consistency with the historic nature of the building, and to ensure new additions are safely attached to the sign.”

Additionally, rooftop and exterior signage are prohibited by the terms of X’s lease for the Market Street building, with the exception of the “blade sign” that had said “@twitter,” which Musk had pulled down as part of his rebranding efforts.

Even that initial sign’s modification would require landlord consent, according to the San Francisco Chronicle’s reporting of the lease.