Every week...a few times a week...my sellers will ask: What improvements should I do if I am selling next month?
My answer is just make sure you do them right and don't become a Mike Holmes show candidate :(
My Top 21 list of Improvements is for clients only but to get you started, the Appraisal Institute of Canada has a great interactive calculator to use.
Contact me for a 1 on 1 pre-renovation appraisal. In the last few months I have talked my clients out of several low return renos that did NOT affect resale value.