Need references for general contractors

[Account Closed]

I am planning to add a detached 2 story unit (900 sq ft, 2 bed/2bath/kitchen) and need recommendations for good general contractors who are willing to work in san ramon/pleasanton area. We have the plans ready. The quotes that I received from couple of contractors are very high and I am looking for reasonable contractors that can build for less than 200 per sq. ft.