Sutter plumbing came out and videoed the exterior and interior sewer lines. The main clay sewer lateral is completely clear and uncracked, and not a candidate for the Sewer lateral Program. He said it looks good and could use a cleaning once the house is built.
The interior sewer line was also pointed out. This is made of cast Iron and he recommended replacing that with PVC, even though there were no cracks there either. He did not think the lines needed to be larger either; they are 4".
He gave me a rough estimate of $8200 for 41 feet of replacement line around $200 per foot installed.