Backyard improvements - worth it?

[Luke Pontier]

My wife and I recently purchased a duplex that we are house hacking and intend to hold onto and rent after we move out. The backyard is in rough shape. What are the best value adds (if any) to a backyard for a buy and hold duplex? Have you found it worthwhile (with a return through increased rent or appreciation) to add a deck or patio? TIA.