There is one EC that was doing 'new' resi in the Twp I work in that did a SFD of normal size in one day; rough & service. Houses ranged in the 2k to 2.5k SF.
He had three (3) 2 man crews there, so it worked out to 40+ man hours total. The builders loved him.
That was his 'thing'; new resi construction only. He had a shop with materials all 'on hand', and the crews would have everything they needed. Inspection was 99% no issues, as he personally walked the job before scheduling the inspection.
Other guys locally are in for two to three days, so it basically works out to the same man hours.
The McMansions (still building) are another story. One is in the third week of rough.
