Determining the value of damages is not always easy, but as a general rule you can charge the tenant for the fair market value of the damaged item (see e.g. depreciation and useful life expectancy calculations), plus the costs of repair. Do not charge the tenant for repair items that are the landlord’s obligation or that exceed the scope of the damages at issue. Also, beware of charging for the replacement of material in order to “match” the damaged material. Consult an attorney regarding issues of damage value.