Build something together.

[SverhRazum]

Okay, few builders of one player can build something together. Is it possible to allow different players to build one building?

 

[Pyrogasm]

Shared unit control and human builders maybe? (Or whatever part of repair gives humans that ability to speed up buildings)

 

[Atakan Özel]

You may set the building as an enemy for all of the builders and use this method:

Events:
A unit is attacked​

Conditions:
Attacked unit is (Building)​

Actions:
Set (Building) HP %x​

Or maybe an other trigger function as a "whenever unit takes damage give it x hp at a time". And so after that all you have to do is changing the owner of the building.

 

[Halithor]

You could use the Priest's "Heal" ability to create an auto-cast ability that can target damaged allies buildings (which includes under construction structures). Whenever that ability is used on an under construction structure, you could set the construction progress higher. This will require you to track the construction progress yourself, as there's no way to get a building's current construction progress.