I am not a builder, but based on my research, it seems you can estimate it will cost about 50% of the price of the land to develop it. I would take that into account and then estimate $25,000 for septic and $25,000 for well.

The current real estate market isn’t necessarily a fun one, but there seems to be some relief for Buyers these days. Interest rates are still on the high end (~ 7ish%) and inventory is low, but we aren’t seeing offers as crazy.