Do I need a city permit for this?

No: Pressured walls now officially demand a city permit. Do so without at your own risk.

Is there any kind of partition wall I can put up without needing a city permit? Or do they all? I can't move forward at my own risk because the building super is in my unit every day and very diligent about his job.

--Is there any kind of partition wall I can put up without needing a city permit?--

Yes. A curtain.

But seriously, you may be able to install a sliding door type apparatus. But putting up an actual wall? No way without a permit. And unless the space to be partitioned has a window you are very unlikely to receive such permit. Zoning laws, you know.

By the way, I did know someone who fudged this by building the partition wall up to about one foot from the ceiling, and installing sliding glass panels at the top. Since the wall did not go all the way up, it was somehow allowed (or maybe someone looked the other way, who knows). They used the space as a bed room (totally illegal since there was no outside window).

Take it will a grain of salt but...

http://en.wikipedia.org/wiki/Pressurized_wall

I would just file just in case. God forbid if there is a fire and a fireman dies because of it. I heard that has happened in the past, so....

You do need a permit to build a partition. You might be able to get away with some type of sliding door/panel partition that does not require a drop soffit to support it as you could argue it's just a space divider, not a partition. However, from what you're describing, you want a definite separation of space.

As for the door, you're "cutting away a portion of a wall" which does require a permit and does not qualify as "minor work" (permit free things like replacing a plumbing fixture in place or a window in an existing opening).

Since it's such minor work, permitting it will not be insanely expensive and will keep you out of trouble in the long run. It's more of a time suck than anything else and you can probably find an architect who will self-certify the work which will greatly reduce the permit wait time on the design end.

Of course this is a public safety issue & possibly a case of life or death (you or a public safety person) & poor you might waste another 3 or 4 weeks. If you're altering that space & moving points of entry & egress, the safety officials need to know. We generally don't think of these sorts of things, but should there be a fire, your perspective will change INSTANTLY.

Roons,

You need to ask your management company, some require them and some don't.

Primer05 is on point, you definitely need to ask your management company. I do know that a company with a DCA license is allowed to install partitions. I started up a blog about pressurized walls for a class at NYU feel free to check it out http://pressurizedwallsguide.blogspot.com

just use furniture creatively, tall custom book case with a sliding panel at the end, as long as doesn't go all the way up nothing management or dob can do about it.

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In 2018, I added three sliding doors across my NYC alcove and it needed a NYC Dept of Building permit and approval from the co-op board and property management. The permit also demanded an architect create a rendering of the work to be done and asbestos testing. The permit process doubled the cost. Worth every penny, IMHO.