We make single-level houses with a reinforced concrete structure, because it's cheap.
You know what isn't cheap? Wood. Wood is incredibly expensive to put into a shape, even if you are willing to cut forests down to get it.
The low cost of lumber is one of many things in America that don't make sense economically, but that persist because of momentum, with each generation receiving an inferior facsimile of what the previous ones knew. See also: car-centric policy (from infrastructure to gas prices) and retirement planning (pensions to IRAs to nothing).
The largest share of the illegal wood extracted from Brazil goes to the US.
What is not to say that most of the wood in the US is illegal. It's probably a small share. But some of your houses do pretty much chop forests down. (And your government does help fight that, but it's hard to completely stop it.)
There's something distorting your economy. Concrete is incredibly cheap as a material, extremely prone to use in a large supply chain, and requires way less labor than wood.
You make houses siting over finely built wood lattices... how much do you pay to the people building those? Because I can't imagine it being justifiable with Brazilian salaries.