The main goal of this summer's work is to update the creaking air conditioning system.
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.
All of the carpeting in the West Wing is to be replaced - at a cost of $1.17 million.
The Oval Office is empty - the armchairs where foreign leaders have sat, couches, tables and even the legendary Resolute Desk, under which Caroline Kennedy hid as a child, have all been moved out.
Storage containers lined the driveway.
President Trump may in New Jersey for a 17-day vacation, but the White House has been humming with activity in his absence as it undergoes a series of renovations.
Former White House press secretary Sean Spicer showed his ID to a Uniformed Secret Service officer Friday.
Construction started just before Trump and other White House staff left the West Wing last week.
South Portico steps on the South Lawn are also being restored for the first time since President Dwight Eisenhower was in the White House.
Workmen installed new carpet in the West Wing.
Carpet is unloaded off a truck at the West Wing.
No reason for the Monday trip to Washington from New York City was immediately provided.