House Runs Through 4 Parcels

[Bryce Davis]

What happens if someone has segmented their land so that the houses and land run through multiple parcels. 

They have a house on land and they have turned 1 acre into 4 separate parcels. I am guessing they did this to try and avoid someone bidding on their lots at the tax sale. Four of the lots are going up for auction. One of them is not.

What happens if I bought all 3 of the parcels except for the one that was paid. Would I own 3/4 of the house? 

Never dealt with a situation like this.