Creating a building/placing system ?

Hello, First of all i don't plan on attempting to build something like this yet as i still have alot to learn but I'm interested in how the building/placing systems in games like City skylines work to get an idea of what i would need to look into for the future. Can a system like this be created without using any plugins from the asset store and going into the engines source?

Any comments are appreciated, Thanks.

 

search quill18 or quill18creates on youtube, he started few months ago tutorials for creating rts game with placing buildings and stuff. Highly recommend the guy and it fits your question!

 

Thanks, I'll make sure to check it out