Correcting depreciation by making improvements at less cost than the value added. For example, the management of an aging strip shopping center makes a decision to refurbish the windows and walkway at a cost of $2,000 per unit. Management estimates this will provide a rent increase of $100 per unit. The current neighborhood gross rent multiplier is 120. Therefore, the value added by the improvements is 120*100=$12,000 per unit. This is curable depreciation since the $12,000 unit value added more than compensates for the $2,000 unit cost of the improvements.