Right wing trolls aside, this is one of the problems with the hallowed supply and demand economy. The owners of this building did nothing to warrant the doubling of rent for these units. It's like a lottery win for them. That the rest of us pay for.
Profiteering doesn't trickle down.

@1, 2, 3: I think you are both partly right. Property taxes have increased, and these costs are eventually passed along to tenants in increased rents -- but the tax increases are not all due to us voting for additional levies. A very substantial portion is due to the higher assessed value of the properties. And the rent increases are way bigger than the tax increases. If the taxes were zero we would still see high rents because there is a high demand for rental housing. However, the higher rents may not be "like a lottery win" for the owner. It might be if they bought the building 25 years ago. But if they bought it recently (or in 2008 before the market fell), their mortgage may leave them (deliberately) cash neutral or cash negative while they wait for the value of the property to go up. It takes many years to make money as a landlord unless you start with a huge amount of money in the first place.

We need more housing.
Allow & encourage new housing.

I lived in a 2 bedroom apartment here from 2011-2014. I wonder if they got rid of the bed bugs and cockroaches.

I thought Charles was married and had a house since the early 1990s.

@2 Actually the Owners DID PLENTY. They paid the mortgage + taxes on the property long enough for Real Estate values to rise. That's not nothing..

It's not profiteering to act on changing economic climates. If Landlords can't make a profit you won't see new construction. Really just that simple..

Sorry @1), I have owned a home since 2001. My mortgaged back then? $1100. My mortgaged today? $1500. you can't bullshit a homeowner. and I did not bullshit my renters when i did not live in the house.