messed up topology on the model

All the polygons should be four sided, I have deleted too many edges on the model i.e. The windows (holes)

Next time to improve I should first carefully plan the edges on paper before modelling. (could of used the inset tool on the holes in the walls for the windows)

The house model will be remodelled ensuring that edges are looped around the model to prevent further mistakes. Will be looking at further tutorials to help me to create a neater low poly model with correct edge flow.To get a better understanding of this.

Bad polygon modelling