Home loans have emerged as the new battlefront for the local fossil fuel divestment campaign against the big four banks, with the launch on Monday of a mortgage brokerage website to switch home owners to "clean" lenders.

The new brokerage, Future Home Loans, is the latest project from the team behind Future Super, a superannuation fund set up last year to entice investors to switch from funds invested in coal, oil and gas.

Simon Sheikh is targeting home owners with mortgages at the big four banks because it will force the banks to "sit up and notice". Credit:Melissa Adams

Co-founder of both sites, Simon Sheikh, a former national director of activist group GetUp, is aiming to switch $200 million to $300 million in home loans this year.

"A mass home loan switch would make the banks sit up and take notice, it's one of their highest margin businesses," Mr Sheikh said.