Is there a global discount on the cost of repairing a commercial premises?

The plaintiff concedes that where the effect of the repairs is to put the premises into better condition than they were at the commencement of the lease term, there may be a discount from the full cost of the repairs. However, the plaintiff adds, where the repairs do not improve the condition of the premises but put them back into the condition they were at the beginning of the term, there should be no global discount, citing Buscombe v. Stark, supra, and any discount should apply only to repair items and not to demolition or clean up items.