Some of you are so off mark it's incredible. New home construction makes up the majority of home built in Mexico. By that I mean neighborhoods where a builder goes in and builds hundreds of homes. INFONAVIT prefers tract built homes over home construction by a huge margin. What you might see in small coastal towns or rural areas is not the norm.
The CFE has very strict inspectors (yep, go ahead and talk about bribes and payoffs) and they actually do the inspections on tract built homes. Why? Because at that level it can affect the grid overall. Mexico has one of the newest and most technologically advanced grids in the Americas.
Again, show me facts that back up your statements. I have mine.