Workers are upgrading the heating, air conditioning, ventilation, and IT systems as well as making a number of cosmetic changes.
Trump plans to remain on his working vacation until later this month, when he returns to the White House and prepares for a crucial September that is stacked with deadlines and legislative priorities.
The West Wing is where it all happens at the White House - historic decisions, power struggles, meetings with foreign leaders.
It also houses the offices of the president's closest advisers, the White House press corps and the briefing room.
The tour included a stop in the Oval Office, its wall covered in plastic and the traditional carpet removed, exposing tricolor parquet floors.
Storage containers lined the driveway.
While he's there, White House workers are expected to wrap up major renovations to the president's mansion.
Former White House press secretary Sean Spicer showed his ID to a Uniformed Secret Service officer Friday.
Cranes were positioned in front of the South Portico.
But for a week now, the West Wing has been one big construction site.
Like the rest of the White House, the cornerstone of which was laid in 1792, the West Wing needs regular renovations.
No reason for the Monday trip to Washington from New York City was immediately provided.