California Civil Code > Civil Code §933. Use of Evidence of Repair Efforts
If any enforcement of these standards is commenced, the fact that a repair effort was made may be introduced to the trier of fact. However, the claimant may use the condition of the property prior to the repair as the basis for contending that the repair work was inappropriate, inadequate, or incomplete, or that the violation still exists. The claimant need not show that the repair work resulted in further damage nor that damage has continued to occur as a result of the violation.