Jill,
I don't know anything about the firms listed below except that they're members of the same national alliance (BDO Seidman) that the firm I work for is. That means they should have pretty high standards. The first one specifically mentions contractors on their website:

http://www.kempburdick.com/
http://www.sabcpa.com/

Another route might be to check with the Associated General Contractors branch in Nevada.

Good luck!