@Rocket J Squirrel
If this is your personal residence, you do not depreciate the improvements. You add the cost of the improvements to your basis when you sell the home. Critter-3 must have thought that you were asking about a home that you rent out to a tenant, not the home that you live in.
You can find a little more detail about improvements in Pub. 523. Look for "Improvements" in the index.
