Systems and methods for generating a valuation, including : a processor (2); a non-transitory computer readable storage device (8) in data communication (14) with the processor and having encoded thereon computer executable instructions which, when executed on the processor, implement : a graphical user interface (201) for interacting with a user for receiving information including fractional interest information; and a valuation engine (205) for generating a valuation discount for a fractional interest in real estate, in response to said fractional interest information.