We won't crown a villain, because build quality varies project to project and even house to house within the same builder. A useful frame for high-cost Southern California markets: land costs mean it's mostly large national builders doing the work, since small local builders struggle to operate there, and city inspections and building regulations tend to be strict, which generally keeps quality within acceptable bounds. California new construction also carries statutory warranty coverage, which gives buyers recourse if defects surface after move-in. Confirm the current warranty length and exactly what it covers, since those requirements can change and vary by situation. The contrast we'd point to is fast-growth markets in other parts of the country during boom periods, where builders racing to meet surging demand have at times drawn more construction-quality complaints. Rather than ranking builders, do the legwork on the specific home: - Get your own independent inspection on new construction. A lot of buyers skip this and shouldn't. - Research the particular community and talk to recent buyers there. - Read the builder's warranty carefully before you sign. A good individual inspection tells you more about the house you're actually buying than any general reputation ranking ever could.