An update to my previous comment.
@Nyxyx This may work without cleaning the model. I did some more testing after adding a little to the value of $HARBOR_EXTEND_AREA_WHEN_BULDING (must be greater than the length of the building, in this case -280).
Test 4a
https://steamhost.cn/steamcommunity_com/id/Igi_PL/screenshot/2502394419294606969/
Test 4b
https://steamhost.cn/steamcommunity_com/id/Igi_PL/screenshot/2502394419294606780/
Test 4c
https://steamhost.cn/steamcommunity_com/id/Igi_PL/screenshot/2502394419294606415/

@Nyxyx you can try to use $HARBOR_EXTEND_AREA_WHEN_BULDING ( thread on Reddit ), but, from what I see, this will work only during placing.

I did a quick test with Bloc 1 and $HARBOR_EXTEND_AREA_WHEN_BULDING -180 placed before 1st $CONNECTION_PEDESTRIAN (screenshots below). If you want to disable collisions, you need to clean the model.
Test 1
https://steamhost.cn/steamcommunity_com/id/Igi_PL/screenshot/2502394419294468703/
Test 2
https://steamhost.cn/steamcommunity_com/id/Igi_PL/screenshot/2502394419294468522/
Test 3 with No collision Signalling control building Hamm https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2513910596

https://steamhost.cn/steamcommunity_com/id/Igi_PL/screenshot/2502394419294468156/

and incase you say you cant, there are already many buildings on the workshop that do

remove the collisions, i want to be able to atleast put some shops in the open areas

Yeah you can make buildings not collide with other objects. But there are already a bunch of cinemas, shops ect. on the workshop so you can place those in the empty space on these flats

One, suggestion, you should remove collisions because it would be nice to put some stuff like Cinema or Shop between buildings (idk how to call this)

yes please, split it

yeah but you could probably split it into multiple buildings so that it can both be more modular and not have so much dead space

Oh, in that case you’re probably right

Which one is this? Because the game is hardcoded to autogenerate the footprint in a rectangular shape according to the extremities of the model. I think you can add a small segment to the footprint with a road connection but that's about it. As far as I, or anyone on the modder's discord are concerned, you cannot define the shape of the footprint.

i'm pretty sure it does.
Just off of the top of my head I csn think of the construcion office pack which has a small construcion office with an irregular form.

It would be nice if the game let us define the footprint of the buildings we make

It would be nice if the empty space wasn't part of the building.
It could be used for parking lots and kindergardens.

Aaaaaah yeah! My parents lived there when it was just build in the 70's! Epic!

Make P-3 series like dat pls

They're not 100% accurate; they're slightly fictionalised.

I thought the standard Biljmer blocks was 11 storeys tall thou

Nice

gorgeous!

isnt this where that el al air cargo plane crashed down