First thing you should do is contact your city's zoning department to make sure you can rezone it and if so, for how much. Next thing you need to do is check the wiring for the property, you might need to rewire to conform to a multifamily property. Most investors do not want to pay the tenants utilities, and if the property is on one meter this creates an issue. If your market is requiring landlords to pay utilities then it's not a problem, so check your market. To determine value of this deal, first find the NOI (gross income-expenses). Divide the NOI by the cap rate investors want in your area. Ask local investors what cap rates they are buying at. That will determine your purchase price. To find a buyer, ask investors in your area that invest in multifamily about the deal they would be glad to determine if it's a good deal. If you have a local REIA, go to it network with other investors and you can find a buyer that way