Key legal question
Whether flood-related protective and repair measures in a privately owned property are deductible maintenance costs or non-deductible investment costs.
Extracted holding
The measures were deductible maintenance costs because they served to preserve or restore the property's utility after water damage and did not create a taxable value increase.
Extracted reasoning
Maintenance costs cover expenses aimed at preserving existing value or restoring prior utility. The court held that the decisive criterion is the objective effect of the work, not whether new installations were partly created. Protective measures against elemental events such as water damage are deductible if they eliminate a loss in value or restore the property's usability. The authority's focus on 'building defects' was not decisive for tax purposes.