The state mandates new construction warranties but many builders use different corporations so they are very hard to enforce. Even if you get a good home inspector its difficult to tell if a building was built properly.
I would say to look for the following signs:
1- How is the drywall finished? Can you see tape lines or is it uneven?
2-Is it painted properly? Look at the top of the wall where it meets the ceiling and see if you see spots or it look light.
3-Are the fixtures good quality of very cheap standard finishes?
4-Brand name of boiler / hot water tank?
5-What type of windows did they use? Are they energy effiicient? Are they single or double pane?
6-Flooring - What did they use? Carpet or a combination or hardwood and carpet?
7-Are the light fixtures the cheap dome style ones that you can buy 8 to a pack in home depot?
8-Are the cabinets cheap looking? Countertop cheap?
The key is, if someone puts thought into any or some of these items you might have a company or individual that takes his job seriously.
When I build / remodel I take my time and put thought into each decision and sub contractor that I use. I also go energy efficient . If you find someone like this with a project that you like, you will most likely do well.
With all that said there is no builder on the planet that can gurantee that his subcontracttor have done everything properly. You will have problems with a new home as you do with an existing home, the key is to try and minimize them.