If the city/public is funding a building, i would think they are checking if it is built to code before they pay the company in full.
If its not built to code, the contractor didnt finish the job and will not be paid until the building is up to code.
If its a private investor building the building, thats on them, they shouldve hired better contractors or been more thorough in their management of their contractors
Flooding is a big issue right now in Toronto because we've had a few 'incidents'. You can build a building such that every drop of rain is gone from the property within minutes of it landing, straight into the storm sewers. But you can't have everyone do that, or every rainfall will mean a major flood in the lower-lying areas. And anyone in Toronto back in 2013 remembers exactly what that is like (last week too, nearly).
Instead, regulations now say that new buildings have to retain their water for as long as possible. You can release it, just not all at once, and hopefully not all of it. Green roofs are great to absorb the water. Car washes in the underground parking garage. Options like this exist, but they cost money.
This is only one example (storm water management). There are others. The goal of the city regulating certain engineering aspects of the buildings isn't just to protect those directly living in the building, it's to protect the city as a whole.
Fuck NIMBYism straight to hell, but don't tell me that the developer flooding my property isn't my problem.
If its not built to code, the contractor didnt finish the job and will not be paid until the building is up to code.
If its a private investor building the building, thats on them, they shouldve hired better contractors or been more thorough in their management of their contractors