When a global pandemic strikes, a construction crew in the midst of building a mysterious billionaire’s remote New Zealand bunker attempt to save themselves by sheltering inside it. However, they risk their own lives when their client arrives wanting to use it and they refuse to leave.

A fractious construction crew takes refuge in a survival bunker when a deadly pandemic breaks out but must unite to fight eviction when the owner and his ruthless security arrive.

Well, the premise looks interesting, but I have to agree with savinh0. I don't even see how this would even work as a Feature script.

You marked it as being a thriller, so I assume it will be something more along the lines of "cabin in the woods" kind of feel. But, its a bunker. A bunker is made with the intent of keeping whatever is outside from getting in when closed. And it does the client no good to destroy the bunker to get in because then they can not use it. All in all, this idea is a bit flawed mate. I suggest revising.

Your logline is solid, it contains the main conflict, the stakes, the characters, and it suggests a genre as well. The only issue is that it's too long.