Comparing Temporary grids

[Pinzu]

Buildings are competing for grids so when a buildings starts constructing I want to find out the preliminary available grids, one building can't have the grid of another at the same time.

IF the building is paused it loses all its grids temporarily and nearby grids will claim its territory.

IF a building is completing faster then another it will take grids from buildings under construction that are behind it.

IF the available grids are 0 the building construction will be paused.

What I currently need help figuring out:
How to detect when a building progress catches up to another nearby building?

 

[Ezekiel12]

For some strange reason there is no reliable way to get the construction progress of a building currently. So you will have to trigger it somehow I guess..

 

[Pinzu]

Screw that, I'll be moving on then. Thanks anyway.

 

[Spartipilo]

If you store the time it takes for a building to become "build" and start a timer from the moment it's placed for build, you can calculate the progress