self employment tax? llc?

I hold my property in an llc. If I buy and sell one, in less than twelve months I know I will pay short term Capital Gain tax. But will I have to pay a self-employment tax, even though the llc is the owner?

Do we assume that the LLC is a single member LLC?

If so, then when you are acting as a dealer to real estate, the profit from your flips are taxed as ordinary income (not short term capital gain) and self-employment income taxes also apply. Compute your tax on Schedule C (1040) as if the LLC did not exist.