To determine Lee's depreciable basis for the building, you need to exclude the cost of the land, as land is not depreciable.
The total cost of the building was $330,000, and the portion allocated to the land was $90,000. Therefore, the depreciable basis of the building is calculated as follows:
\[ \text{Depreciable Basis} = \text{Total Cost} - \text{Cost of Land} \] \[ \text{Depreciable Basis} = 330,000 - 90,000 = 240,000 \]
Thus, Lee's depreciable basis for the building is $240,000.