In a swipe at Prime Minister Theresa May’s authority, the Foreign Minister set out his plan for a “glorious” future for the UK post-Brexit.
Boris Johnson said rules restricting foreign buyers from snapping up property could be imposed once Britain leaves the bloc.
He told the telegraph: “It is often pointed out that the price of housing in certain parts of London may be increased by buyers from overseas.
“But there is no point in putting any kind of tax on foreign buyers, because the inhabitants of 27 other countries cannot legally be treated as foreign.”
Mr Johnson also repeated claims that Brexit would free up an extra £350million which could be spent on the NHS.
The Leave campaign’s most prominent pledge in the run up to last year’s referendum was that the NHS would benefit from £350million per week if the UK was to end its contributions to the EU.
And today the Foreign Minister insisted that the Government had to make good on the pledge and increase NHS spending after Brexit.
He said the UK would be “roughly” £350million better off every week and it would be a “fine thing” if a lot if went on the health service.
Mr Johnson said: “Once we have settled our accounts, we will take back control of roughly £350million per week.
“It would be a fine thing as many of us have pointed out if a lot of that money went on the NHS, provided we use that cash injection to modernise and make the most of new technology…
“One of the advantages of investing in the NHS – if we combine that investment with reform – is that we can turbo charge the role of our health service in driving bioscience.”
He added that remaining in the single market or customs union after Brexit would make a “complete mockery” of the referendum.
But critics warned there is “absolutely no chance” of the pledge will be delivered.
Labour politician Chuka Umunna said: “He promised to guarantee the rights of EU citizens living in Britain, and nothing has happened. No one can trust a word he says.
“The £350million a week promise was a fib, and there is absolutely no chance of it being delivered.
“Boris should be apologising for his disgraceful conduct in the referendum, not continually making the same impossible promises.”
Labour said Mr Johnson’s article has exposed the division in Mrs May’s top team.
A spokesman for Jeremy Corbyn said: “Boris Johnson has laid bare the conflicts at the heart of Theresa May’s Government over Brexit and cut the ground from beneath the Prime Minister’s authority.
“In the process he has exposed the Tories’ real Brexit agenda – a race-to-the-bottom in regulation and corporate tax cuts to benefit the wealthy few at the expense of the rights of the rest of us.
“The Foreign Secretary even has the gall to dredge up the fantasy of £350 million a week extra for the NHS. The Prime Minister must spell out now how this will be paid for, or stand condemned for once again trying to mislead the British public.”
Mrs May is scheduled to set out her own vision for Brexit in a speech in Florence, Italy, next week.