capital gains on selling condos in multifamily

[Nemo Djuric]

I bought a 4 unit/multi-family in July 2017 and have been using it as primary residence since. During this time I did  a condo conversion.

This year I sold 3 of them (and used all the money to payoff mortgage and renovation debt), now I have one left under my name. Will I pay capital gains if I sell it after July this year since I used it as my primary residence for 2 years? How will it be calculated?