None
Its more just a selling point...
In our area, ROI comes from three things: Master bath, master bedroom, and kitchen. Detached buildings don't seem to do much because many people don't want to talk out to them in the winter time.
I was lucky in that the three nice outbuildings on my property kept most of the young buyers from wanting the property until we found it. It was listed for 2 and a half years before we found it.
The return on investment is directly to you on how much you do and can create in your use of the space. If it cost $15,000 and you save $30,000 in repair cost and replacement cost of automobiles you have had terrific ROI. The immediate ROI is about all you are going to see as they really won't add to property values except for tax purposes. If wood working is your hobby, add the value of each thing built and the amount it would have cost to purchase and then figure your ROI. If car restoration, What would it have cost to have someone else do the work or could you have afforded someone else to do it. My shop has paid for itself several times over on savings on car repair, furniture/cabinets made, welding projects complete etc. I have restored and driven for years at least 6 cars way beyond their natural lives. I hate car payments and have never had them because of being able to fix/paint/rebuild/reupholster cars by having shop space. A $15,000 outlay on materials for a shop and doing work yourself would repay it self many times. Just don't expect the return to be in real estate prices.
The return on investment is directly to you on how much you do and can create in your use of the space. If it cost $15,000 and you save $30,000 in repair cost and replacement cost of automobiles you have had terrific ROI. The immediate ROI is about all you are going to see as they really won't add to property values except for tax purposes. If wood working is your hobby, add the value of each thing built and the amount it would have cost to purchase and then figure your ROI. If car restoration, What would it have cost to have someone else do the work or could you have afforded someone else to do it. My shop has paid for itself several times over on savings on car repair, furniture/cabinets made, welding projects complete etc. I have restored and driven for years at least 6 cars way beyond their natural lives. I hate car payments and have never had them because of being able to fix/paint/rebuild/reupholster cars by having shop space. A $15,000 outlay on materials for a shop and doing work yourself would repay it self many times. Just don't expect the return to be in real estate prices.
