121 exclusion for fourplex

[Jacob Pereira]

Hello all

I'm trying to determine my next move, and one of the ideas that I'm contemplating is moving back into a fourplex I own for another year (I lived there for a year already in 2014) and then selling it in order to use the sec. 121 exclusion on capital gains for my next project. I've been unable to determine whether I'd be able to use the exclusion on the whole building, or whether I would need to prorate it out because I've only been living in one of the four units. I'm sure many people on BP have gone through this, and I'd like to learn from their experiences.

 Thanks BPers