The 100-150 cost that was quoted is a very conservative number and about what a contractors cost would be. It is based on several factors that change depending on the economy (labor, wood, steel, concrete) and then the finishes that are chosen i.e. granite or caesar stone counters, what kind of flooring, bathroom tiles, faucets etc. In Van Nuys I would say you were looking at more like $175-$200 per sqft. if you use nicer finishes.