Converting oil to gas in Massachusetts cost?

[Yuzi Stha]

Hi,

I was looking to purchase a house in Arlington, MA which currently has oil and wanted to convert to gas. When I reached out the National Grid, they said there is gas line in the neighbor house but it needs to be extended to this house the extension estimated length is 19 ft. She quoted me the cost of $102,748. I am really surprised with the cost of extending the gas line, does it really cost hundred thousand dollars to extend 19 ft of main line? 
for service line length is about 225 ft, with national grid covering 100 ft for free, it is about 125 ft in the drive way length for service line.

Anyone has any clue on how much it cost for the gas line extension in Massachusetts?