Build and sell do you have to pay social security tax?

[David C.]

This is my first project.  If I build a house, pre-sell it when almost done, then actually sell it when done, do I have to pay social security taxes on the profit?  I know as a short term gain I would have to pay income tax, which is fine, but I am worried I would have to pay social security taxes as well?  I am already employed full-time and paying SS tax on that income too.  

Thanks!

[Carl Fischer]

@David C.

Consider renting for a while at least a year and then sell. Turn it into long term capital gains and pay no SSI on the rent or sale and turn it into long term capital gains. Consider carrying costs, tax savings, cost of money, and use a CPA to help and see if it is worth it. 

As@Nicholas Aiola questioned your intentions, carefully think about your answer and weigh the consequences.