Converting to gas heat is a great idea, both from the point of view of the environment and your heating bills. I don't think you should expect the seller to do it, but you should negotiate the price taking into account that you will need to spend X thousand dollars on the conversion and remediation (removing old oil tank and any clean-up necessary). You should talk to National Grid (the gas company in Brooklyn) for info about rebates, cost, and tax advantages: https://www.powerofaction.com/gcnationalgridincentiveofferme
Have a great day;
CEO & SR Credit & Mortgage Consultant of
Ex-Mortgage Broker of more than 10 years
PS; aslo try service magic - I think that's the site that gives contractors & estimates.
The decision is a matter of personal preference. As long as the heating system is working, it is doubtful that the seller would want to give you any consideration. The conversion usually would cost about $7,000.00 (speak to a licensed plumber for a more precise estimate). Make sure you also remove the old oil tank, some people leave it to save money, but it is an eye sore and a waste of space once you convert, just remove it.
You should take this into consideration when you are determining the amount you want to offer for the house but don't try to force the seller to fix it. You would just be complicating the negotiations and if the homeowners feel there is nothing wrong with the heating system you may just upset them.
If I can be of further assistance, please let me know. Good luck!
Mitchell S. Feldman
Associate Broker/ Director of Sales
Madison Estates & Properties, Inc.
Office: (718) 645-1665/ Cell: (917) 805-0783