The crazy part about this is that it is fundamentally a competition problem, but they misidentified the perpetrators. It's not predominantly construction companies colluding with each other in the market, it's land owners colluding through regulatory capture of zoning boards to constrain construction.

Or, to the extent that it is construction companies, it's still regulatory capture rather than market collusion, but in their case it's capture of occupational licensing to artificially restrict people from entering into the trade labor market.