Appraisal scheduled - How to determine value of updates done?

[Yesenia Padilla]

I am in the process of a refinance for one of my investment properties. My appraisal is scheduled, I am meeting the appraiser tomorrow and would like to provide a list of updates that were done. I really need the property to appraise at a certain amount for the refi. On the list I want to include a column that lists the value added, but I am unsure of what that amount would be, how would I determine that amount?. I'm located in northern California. Any advice, suggestions would be greatly appreciated.