The best avenue to take is to do an anaylsis of what the highest and best use of the property is. That takes zoning, income and potential value into account to give you the best outcome for the potential value of the property. Typically a multi family home has more value than a single family, however every situation is different. Hope this helps Joan at 617-216-7455
In some areas, 2 families are selling for less than single families. If you'd like to contact me with an address and more info- I can try to help you further.
Thanks and good luck,