Even without the quake, if there was some genuine and serious assessment to be done on private villas or condos in Thailand, most would plainly not be fit as safe. Should it be faulty construction, cheap materials used, non respect of curing protocols for the cement, suicidal electric wiring, sloppy plumbing..name it and you'll have it.
Be it a house in village in Isaan or a post pool villa in a swanky developpment in Hin Lek Fai. Most of these properties have been badly built or have sloppy fittings done by crooks (thai and falang) who know perfectly well that they can get away with their crooked habbits.
But we all knew that before...but just did not want to admit it. Of course, no generalization here as surely there are still some decent house contractors still left ?