Well of course.. We are like the children of Lake Woebegone, Wisconsin that are ALL above average. (Prarie Home Companion reference);; We are ALL good at negotiations!
You can also check the MLS and see whether they have any move in ready homes listed there. Builders are motivated to give discounts for homes that are already built rather than the ones that they have not started upon.
I think realistically though, there is a limit as to how much you can negotiate for new homes. Simply because unless they are desperate, they will not sell at a loss.
The cost of building in the sacramento area ranges from $100-150 per sqft. So to get the house that you like 2300 sqft @$230k or $100 per sqft for new construction would probably be a bit hard to achieve.
Perhaps you will have better luck with short sales or reos.
Their are several, but you need to to interview 2 or more for 1 that you feel will represent YOU!
Compare credentials, experience in your market area, personalty's that fit you, etc!