@Leslie175, @Cynthia-and-Chris1, it is not super simple, and it is best to consult your tax professional. (I am not a tax professional.)
My understanding is that renovations paid out of pocket are not deductible expenses at all, but rather are treated as an investment. This means you cannot deduct it, but it does increase the cost basis of your property, which will eventually reduce your capital gains at the time you sell the property. As a capital expense, you may be able to depreciate it, which would allow you to slowly claim the deduction over 27.5 years.
Also:
If the remodeling was for a medical necessity, then it may be deductible to a certain extent.
If you can classify any part of your remodel as a repair, then that part can be deducted on Schedule E.
If your remodel happened at the time of original purchase, it of course can be rolled into your mortgage, and is deductible that way.
This is just a broad overview, and your tax professional should be able to provide advice for your specific situation.