A San Francisco man is fighting eviction after a 400 per cent increase in his rent, from US$1,800 to $8,000 a month, allegedly without notice from his landlord.

Neil Hutchinson told ABC News that he has filed an appeal with the city’s rent board concerning the spike for his North Beach home where he has lived for the last six years.

However, a decision will not be reached until early August, and Hutchinson is facing eviction on July 21 because he cannot afford the new $8,000 rent.

“I don’t know where I’m going to go if I have to leave here,” he told local ABC News affiliate KGO-TV.

“So, I honestly don’t know what I’m going to do. I’m struggling here.”

Hutchinson’s attorney, Mary Catherine Wiederhold called it the “largest rent increase I have ever seen.”

“This rent increase is above market,” she added.

Hutchinson’s landlord did not respond to ABC News’ request for a comment.

An international survey on housing affordability released earlier this year ranked San Francisco as the seventh least affordable major market in the world behind Hong Kong, Sydney, Vancouver, Auckland, Melbourne and San Jose.

Meanwhile, data from Zumper’s national rent report for June shows that San Francisco has the highest median rent prices in the U.S., with a monthly price tag of $3,590, $340 more than New York, which came in second place.