Is decent housing a human right?

[king1]

the law of decreasing marginal returns states the the more available something is the cheaper it becomes.
the answer seems blatantly simple. build more houses.

That one is just the law of supply and demand - Diminishing Marginal Returns refers to supply side production where increases in production at some point reach an optimal level given the manufacturing inputs, but over that optimal level the returns per unit decrease... but you are quite correct far too much regulation and red tape