MC wrote:

In some places I have lived here in the south, usually do not require a home
already on septic to hookup to new sewer just becuase they install. However
other considerations are depending per county. On my currnet house the
county requires any house in certain areas to hookup to any available sewer
if within a certain distance to the sewer main. May be due to water basin
issues ? And I was told they only will require when the house was being sold
anyway, current owners were not required. The house is 300ft back from the
road/sewer and was not required to hookup but I was told that if closer I
would have had to hook up.

Yes but some municipalities require homeowners to pay an amount for every foot
sewer main laid in front of their house, whether they connect or not. That
appears to be the case the original poster.