I have spent days building this apartment but every time I entered the lot zoning cheat, it says I need to change lot architecture. I cannot see anything wrong looking at any guidelines I can find, and I've never had this issue before when building apartments. I am definitely using the right doors and there are no passages I can see between apartments. I did have balconies for most apartments, but I removed all access to them in a desperate attempt to make it work, though there was only access to them through select apartments. I am at a loss as what to do.

I don't know if there is anywhere I can upload the package for people to look at, so if that is an option please let me know! I've never posted in any forums before.

Please attach some floorplan images, with walls up, so that we can see what's up.

Likely some sort of access issue. Seconding the request for floorplan images to investigate

I have just discovered the same issue and it has never happened to me previously.
On occasion perhaps one of the apartments was not fully enclosed but I was able to fix; but this is different as not any of them are registering to be rented.



There is no custom content except for two wallpapers I created using Homecrafter plus.
I also generated a new EA Game folder as this was to be my first attempt at uploading a lot to MTS to avoid any corruption of files.
I started building this last week so has never been occupied (never got that far to be able to ). I changed the roof and gave each town house a separate roof; I moved stairs as two of the stairs were sharing a wall.
I have attached the ground floor plan: -

Is it because I am not using spiral stairs?
Any help would be most welcome.
Thank you in advance!

Those stairs work fine, it's stages that cause issues.  Did you use the invisible fence in back to enclose the back yard?  You cannot just have a backyard when on a foundation without tricking the game into thinking it's enclosed.

Hello HugeLunatic,
Thank you for your reply.
I have replaced the wooden fence with the invisible fence...but still the same error message.
All fences have been enclosed - at first I had used a black fence (modern unsure of name) then opted for this wooden fence as used in apartment lots built by Maxis.
How do I trick it?
I could opt to make to make the backyards a decking area as an alternative.

Ladysimplayer8

Probably the stages breaking it.
https://www.simfansuk.com/wp/buildi...ivate-backyard/

I can't see the images in that thread Jo- is it just me? Here's an image from the Wiki that might help.

Niol's invisible fence is good for this also, it is meshless.
https://modthesims.info/download.php?t=219292

Thank you for this and the simple guidance of how to achieve it.
Earlier today I tried just making a decking area and surprisingly when I change the lot from residential to apartment base it worked and I have apartments to let (albeit $4000 per week!)
Now I know what the building issue is, I am currently changing the apartments back to the way I had them originally before changing roofs, some stairs etc.
With this new info guidance, I will also be having my small back garden - just the way I wanted it to be.