Seems about right. My buddy said his is normally $200 and it was $400 recently - for a house, not apartment mind you.

I expect ours to at least double.

Welcome to higher energy costs, inflation, and winter.

You get good LLs and bad ones. Our one before in Millvale was terrible. Came in and broke our dryer trying to clean out the heavily blocked vent when we moved in. We had really bad water/flooding problems and he never fixed them. It was common to come down to the basement/garage with literally 1/2" or more of water on the floor. The mold was nuts over time.

Only stayed there a year and got the fuck out. Ended up not even getting our security deposit back because he claimed the entire place was "infested" with fleas because we had a cat.

Personally, after exhausting my resources calling The Health Dept, etc. I'd be buying space heaters, saving the receipts, and saving my electric bills for the month (or propane purchases if you go that route). Bill them back to the LL when it's all done.

Our LL was super cool about this when ours went out. He was on top of it, but said the HVAC guys were swamped when it happened last year. Asked if we had space heaters and if not, he'd bring one over. We were good, but he offered to cover our propane costs. I actually declined because it was only for 2 days.