That's why I just give everything to the accountant and let him do his thing.

We do all work ourselves so it's only ever materials that we claim but still it all adds up - usually a few thousand a year. CRA won't know what I had before so how will they know the material wasn't used for repairs?

I am pretty sure when I opened my daycare my accountant wrote off a lot of my renos for the basement. We added a sink and counters to the space, railings on the stairs etc. 2 years ago we had a full basement Reno as the daycare space flooded. It was all paid through insurance so nothing was claimed on my taxes. I did put up a pile of shelves in my laundry room and basement bedroom closet that I have every intention of claiming this year. It's because of daycare I desperately need it!