Capital gains tax on an owner-occupied 4-family?

[Brittani Gardner]

Hi! I'm looking for answers regarding the sale of my 4-family that I have lived in since I purchased in 2015. I have an offer to buy that will leave me a profit of roughly 100k. I plan to purchase a single family home and use the proceeds as a down payment. Is my building exemption from capital gains since I occupied one of four units since owning? If not, can I do anything to avoid capital gains tax or depreciation recapture beside offset with losses (that I don't have)?