How to write your address when the building name ends with a number?

I'm moving to Japan soon and have arranged housing. The address they have given me looks like this: 福岡市〇〇区〇〇番地　〇〇ビル１　１２３号室.

I was wondering how I'm supposed to write this address when registering it at the ward office. My fear is that they will not let me put a space in the 方書 and thus my address will look like I'm living in 〇〇ビル１１２３号室 which is hard to parse and looks ugly. There are multiple buildings in the same 番地, only differentiated by number at the end.

Are there hard rules on how I must write the address? I would like to put some kind of delimiter between the building name and room number, such as 〇〇ビル１・１２３号室. The city in question is Fukuoka.

As a reference, I found this blog post talking about how to write the address in the 登記. Though obviously 住民票 is not 登記 so it may not apply in my case.

The obvious answer is to ask my city and landlord, which I will do. I was just wondering if anyone has any experience with this and what options I may have.