JD Biggers has done more damage to this conversation than good.
Property Law is big part of what defines a Fee Simple interest from a Leased Fee interest.
In most commercial appraisals in my neck of the woods, if the tenants are on a month to month rent/lease, the owner is said to have Fee Simple interest.
IF the owner has leased the property to a tenant for any time longer than month-to-month, Then they have given the RIGHT OF USE AND OCCUPANCY away for a specified time frame. If they try to sell that property to someone else during the period of that lease, the new owner will have to honor that prior lease until the terms of that lease have been met.
The current owner and/or new owner WILL NOT BE ABLE TO USE OR OCCUPY that portion of the property. In effect THEY NO LONGER HAVE THE FEE SIMPLE INTEREST.
Laymen's Terms:
Fee Simple says, [BOLD] it's all yours [/BOLD] AND you can use it and go there as you see fit.
Leased Fee says, [BOLD] It's all yours [/BOLD] , BUT you have given the right to use it to someone else.
Lease Hold says, Thank you Mr. Landlord for giving me the right to use your property for the terms of our lease. Now that I have the right to USE AND OCCUPY what you own, I can sell that right to someone else. Value is created in the lease hold interest if the lease is considered to be "below market rent".
Example: I own a house with no tenant (Fee Simple). I lease it to a friend for 5 years at $1,000/month. I have given the right of USE and OCCUPANCY to my friend. I now possess the Leased Fee interest in the property, and my friend now possess a Lease Hold interest in the property. After two years, the market rent for my house goes up to $1,500/month. I cannot go in and kick out my friend or raise his rent. I have given up that right (this is why lease terms are so important). When this is the case, it is possible that the Lease Hold interest now has some sort of value. He could possibly sell the right to use and occupy the property to someone else. For example, he rents it to a family for $1,500/month for 3 years. His Lease Hold interest allowed him to earn 500/month off my property. I still own the property, but because of the lease, I lost certain rights.
Now lets say I want to sell my house while it is under this lease? Would a buyer purchase it for market value if it was leased to someone at below market rents? Not if they were an investor. That is only one reason why it is important to properly identify the Interest being appraised.
THE RIGHT OF USE AND OCCUPANCY is defendable based upon Contract Law in the state of CA.