blotunga: Don't you get deductions for renovations? Here you can use up to 25% of your rent-income tax to deduct repairs.
There are cases where you can get tax deductions:
1. If it is your own home where you live, you can get deductions from the work costs, ie. when you hire someone else to do renovations and repairs. This is called "kotitalousvähennys", translated something like "home domestic deduction". You might even get it if you hire someone to clean your home, the purpose of it is to encourage people to hire others to do stuff at their homes (instead of just doing it themselves), and fight grey market (you can't get such deductions if you pay directly so that no income tax is collected from the worker).
2. If you are already renting it out, you can deduct at least many (but not all) renovation costs from your taxes.
However, I didn't get any deductions when I renovated the apartment a bit (for less than 5000€, including both work and stuff). The reason was that I had lived there myself before (already moved out), and I was about to rent it out, so neither of those cases applied to me directly.
I tried to find the answer from our tax office home pages, but they were very vague there about my case, ie. live in the apartment yourself first, move out and renovate it, and then rent it out. I got an impression that in such a case you get part of the costs deducted from the taxes you pay for renting it out, but it didn't specify how much is that part. 10%? 50%? 90%? If there had already been a tenant in the apartment when I renovate it, then I could have deducted apparently 100% from the taxes.
I applied for the tax deductions afterwards and figured they decide what part can be deducted. The reply was that I get no deductions at all, the reasoning was that I can deduct the renovation costs from the taxes for selling the apartment (tax which you pay for the profit you make for selling the apartment, ie. you sell it for more than what you had originally paid for it), if I ever do that.
So the suggestions on the tax office home page was misleading or flat out wrong, AND their suggestion about deducting it from the sales profit tax was bullshit because I wouldn't have to pay such taxes for selling the apartment anyway, as I had lived there myself (the meaning of that particular tax is to charge those who buy and sell apartments for living, not those who sell their own home).
Damn tax office hags, they always like to torment people.