The last word from the US ambassador there, Woody Johnson, was that while he hoped Trump would come to dedicate the new embassy, no date had been set for such a journey.
The decision to move the embassy from its historic location in London's Grosvenor Square was made under President George W. Bush and announced in October 2008.
U.S. President Donald Trump canceled his trip to Britain, amid what experts say are fears that locals will mount massive protests, U.S. experts told Xinhua.
Prime Minister Theresa May offered Mr Trump a state visit to Britain one year ago, when she became the first foreign leader to visit the White House after his inauguration.
"Let's hope that Donald Trump also revisits the pursuit of his divisive agenda". United States officials surveyed more than 50 sites before zeroing in on the site in Vauxhall, which is south of the river Thames, for the new embassy.
Mr Trump's tweet which sparked the row read: "Reason I cancelled my trip to London is that I am not a big fan of the Obama Administration having sold perhaps the best located and finest embassy in London for 'peanuts, ' only to build a new one in an off location for 1.2 billion dollars".
But a full-blown state visit replete with golden carriages and pomp has been deferred amid the threat of huge anti-Trump protests.
"I think we have to welcome the American President to Britain", Johnson said.
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Nice and terrific and still today I think they are nice and terrific except they have kind of added sex appeal to their resume. Khloé addressed the rumours previous year , when National Enquirer reported Simpson had changed his will to include her.
Earlier this week, Foreign Secretary Boris Johnson had rejected suggestions that now was not the time for a state visit.
"We are still working with our United Kingdom allies to find a date for a visit for the invitation that was offered and accepted, " she said Friday.
The mayor of London - who has been criticized by Trump in tweets - said Trump appeared to have "got the message from the many Londoners who love and admire America and Americans but find his policies and actions the polar opposite of our city's values of inclusion, diversity and tolerance".
The mayor, a member of the main opposition Labour party, said there would have been "mass peaceful protests", and that it had been a "mistake" to invite him.
Still, British officials said their government had been working on the basis that Trump would arrive in late February, though no firm date had been set.
"Beyond the disagreements between leaders and the optics of this cancellation, U.S. -UK relations continue to remain strong - largely because there are a wide range of institutional ties between the nations in military cooperation, intelligence, economics, and commerce that operate as normal despite the political storms that may arise", Mahaffee said.
Matters got even worse when Trump re-tweeted video posts of a British ultra-rightist group targeting Muslim immigrants in November.