Park51 owes $1.7 million in rent

Park51, which leases the substation from Con Ed, wants the two buildings so it can knock both down and build a $100 million, 15-story community center.

But the plan hit a major obstacle in August when Con Ed raised the rent from $2,750 a month, a rate set in 1972, to $47,437 a month, retroactive to July 31, 2008, The Post has learned.

When the mosque failed to fork over the $1.7 million, the utility fired off a letter demanding the money by Oct. 4 and threatening to evict.

Park51 principals responded with a lawsuit to stop the increase, calling Con Ed’s rent demands “outrageous.”