Modular building shape

Hello,

I am looking for something similar to this:

I need very simple shapes to build different buildings:
-Floor
-Wall
-Floor with hole to put a staircase
-Staircase for 1 floor
-Staircase with height = floor height
-Wall with hole to put a Window
-Wall with hole to put a door
-Wall with hole to put a garage door
-Pillar

Edit :
I found my man, I will add some pictures when he will finish the job.

hello
I am interested
my Portfolio: https://www.facebook.com/Isshak-souaci-361566937343656/?ref=bookmarks
my gmail: [email protected]

With the image you are referring too, are those specs correct for this project too?

Hello, I found my man for this project.
Thank you

Then set to solved, in advanced edit on first post