Republican US presidential candidate Donald Trump was set to open the latest outpost in his real estate empire on Monday, a luxury hotel in a historic building five blocks from the White House that underwent a two-year, $US200 million ($A264 million) renovation.
While staff at the 263-room Trump International Hotel planned little hoopla for what they described as a "soft opening," about a dozen protesters opposed to the New York real estate developer's presidential run gathered outside.
"It kind of fits his personality that he finds a way to be on Pennsylvania Avenue, one way or another," said protester Judy Byron, 70, a Washington artist.
The hotel is at 1100 Pennsylvania Avenue, and the White House address is 1600 Pennsylvania Avenue. The hotel is housed in Washington's third-tallest building, the 1899 Old Post Office, built in the Romanesque Revival architectural style.
The protesters criticised some of Trump's positions, including a promise to build a wall along the Mexican border to block illegal immigrants.
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Protest organiser Andrew Castro of Baltimore said, "We're out here building a wall against racism."
Trump said on Twitter on Monday that he had made a brief stop at the property "to thank all of the tremendous men & women for their hard work!"
Trump attended the July 2014 groundbreaking for the renovations alongside local Democratic officials before launching his presidential campaign last year.
Trump's company holds a 60-year lease from the US government for the property. It is paying $US3 million ($A4.0 million)-a-year in rent for the building, which fronts the parade route for presidential inaugurations.
