When it comes to stratospheric Atlanta rents, YOO on the Park is pushing the envelope right now.

Standing 25 posh stories, the not-quite-finished tower up the street from Piedmont Park is offering some units for more than $3 per square foot — a benchmark once thought impossible in Atlanta. (For example: a 540-square-foot studio for $1,630).

Extrapolate that number to the size of your apartment/condo for perspective — and try not to cry.

What’s more, some of the choicest apartments here are asking for — and getting — nearly $6,000 per month.

The building has succeeded in renting three of four 1,923-square-foot penthouses at $5,875 monthly. It’s no surprise the fourth unit isn’t occupied, because it won’t be finished until mid-January.

Developers with Trillist have been saying this project would offer sophistication, elegance, next-gen technology, and world-class amenities like Atlanta has never seen before it broke ground on 13th Street.

Among other perks, the 245-unit building boasts a saline pool, cabinetry imported from Milan, in-unit 1-gigabit Wi-Fi and fiber connectivity, an outdoor yoga terrace, and a signature Fido-pampering service called Pet Respite℠.

At last check, the near-$6,000 stratosphere is significantly more expensive than the going rate for three-bedroom (but smaller) penthouses at Buckhead’s Cyan on Peachtree, where rents raised eyebrows upon the building’s debut last year.