Capital gains tax implications on warehouse sell

[Derek Bell]

I bought a 1.3 acre IWD parcel in 2018, built a 15k sf warehouse in 2019. 
I will be selling the property this year. Will I pay long term capital gains tax on the earnings or will I have to declare the earnings as income and pay the higher percentage in federal income tax?

The business that I have set up that holds the mentioned property is an LLC in the state of TN.