@LMtax wrote:
Would the full monthly maintenance fee either be added to the basis of the co-op shares as investment ownership costs, or deductible as estate administration expenses?
You can certainly deduct real estate taxes in the year they are paid and can add improvements to the cost basis of the property (shares), but you have to be cautious with ownership costs.
Per Treas. Reg. §1.67-4(b)(2), if the ownership costs would be commonly or customarily incurred by a hypothetical individual owner as miscellaneous itemized deductions (on Schedule A), they are not deductible.
