@Zachary Gray If you did these renovations on a property you do not own but do rent, you have several options. I have many unanswered questions that I would need to know to give you the best advice. Here are a few: how long ago did you do these renovations? Are you or your company the occupant? Was the owner of the property involved in the renovation costs? Were you the contractor and are asking on behalf of the owner/tenant?
If the renovations were all internal they may qualify for Qualified Improvement Property (QIP) or Tangible Property Regulations (TPRs) also called the Repair Regulations. There may also be the possibility of doing what is called a Partial Asset Disposition (PAD) which would allow the owner to expense the value of what was taken out of the property during the renovation from their depreciation schedule. Like I said, too many unanswered questions.
Yes, existing properties may likely qualify for cost segregation or some of the benefits I listed above. Additional questions?