It is not built yet but I have a lot in Everett that allows for a single-family home and 2 Additional Dwelling Units (either attached to the SF home or detached, duplex style).

The packet also provides the income limits and dwelling vouchers.  

The Town of Ithaca issues Operating Permits to all residences with three or more dwelling units:http://www.town.ithaca.ny.us/Code-Enforcement

Yesterday during my search I came across Dwell Financial out of Charlotte NC.

Are there any tax breaks for investing in low-income single family dwellings?

Maybe the zoning requires .5 acres per dwelling and there had to be 2 .25 acre lots joined to have one house Just research all you can with your local building and planning departments first and research and verify all you can before considering buying that property.

If they are not prevalent in your area then purchase a fixer up that has the potential to either rent rooms in the basement or has livable space that you can rent out or enclose away from your own personal dwellings.

“The Fair Housing Act is a federal act in the United States intended to protect the buyer or renter of a dwelling from seller o...r landlord discrimination.

@Charles Stubblebine  You'll need to have your policy changed from a homeowners policy to a landlord policy, also sometimes called a dwelling fire policy. 

Originally posted by @Joshua D.:Well