But housing specifially is a human right, it is stated in Article 25 of the Universal Declaration: https://www.un.org/en/universal-declaration-human-rights/
Human rights, in my mind, are something that existed before the UN, and exist independent of the UN. And there's centuries of political philosophy that agree with me on that point. See, for example language like "endowed by their creator with certain unalienable rights" in the US Declaration of Independence. That tradition of political philosophy sees rights as inherent to humanity (in this case God-given, but it doesn't have to be), not guaranteed by some statement of a government or group of governments.
For many thinkers in the years following the founding of the United States, precisely this language has been the fatal flaw of the “natural rights” approach. What if the world has moved on and no one can take seriously the notion that there is a Creator which has endowed men with rights? Even for the American Founding Fathers, those Deists among them were already well aware that this phrasing was a mere rhetorical flourish, it didn’t actually mean anything.
In the absence of a Creator who endowed men with rights, we can only view "rights" as a convenient fiction that humankind, as a social animal, proposes for mutual benefit. And in that case, a representative democracy’s decision to see housing as a human right is pretty straightforward.
At first blush, my thought is that you could still create a secular argument for natural rights, but I'm open to being persuaded otherwise.