You want to construct the building without the necessary entitlements... planning approval, zoning compliance or variance, concessions such as roadbuilding or traffic lights, building plan, work permits etc.
You're overlooking some costs there.
Right off the bat is the cost of constructing the structure.
Mind you, when the dust settles, the municipality will force it to tear the building down after obtaining a permit to tear it down, so there'll be that cost too.
Forcing a scofflaw to tear down an unauthorized structure/improvement is a standard weapon in municipalities' arsenal.
So the construction cost of the structure will be a total loss, as well as the demolition costs.
And some occupancy issues
Regardless, the government is not going to issue the building an occupancy permit. No occupancy permit means they can prohibit, well, occupancy. And they can use the government jackboot (police) to physically evict any refuseniks (not that too many employees will want to be arrested for the company's cost-cutting measure.)
And some construction issues
The next problem is, who's going to build it? A company can't just smite the ground and a building pops up.* Somebody has to build it. Unless the company has an internal core competency at that, they'll be going to a contractor. Licensed contractors won't want to touch the job because it hasn't been permitted.
Most likely, the contractor will simply quote the job inclusive of the entitlement costs... and the contractor will hand over keys to a building for which they (the contractor) pulled the permits.
* Okay, yeah, companies do have the ability to 'smite the ground and make a building pop up' in the sense that the Board can allocate a budget and assign a project manager in literally a minute who just hands it off to a General Contractor... but a ton of stuff happens behind the curtain, including design, entitlements (establishing right-to-build, which your premise excludes), contracting, and the contractors look to those entitlements.
