What all is entailed in a 'Price per SqFt' Builder Quote?

[Account Closed]

I reached out to a builder recently who said he could build a house for $125 per sq ft. However, as we were discussing the project in more detail, he mentioned that the price did not include engineering and pouring of the slab, connecting to city sewer/water, or the framing. Is this standard practice? I would imagine a builder would include all associated costs (sans architect) with building a property in his estimated price per sq ft, beginning to end.