This is a great question and a hard search, and the difficulty is not that these properties are rare. It is that there is no standard name for them, so they hide. Search terms to try, because different agents and different listing inputs use different language: guest house, casita, second dwelling, two homes on one lot, mother-in-law suite, detached ADU, main house plus guest quarters, multigenerational, duplex on acreage. Also search the two-unit and multi-family categories, not just single family, because that is often where a genuine second house gets filed. Ask your agent to run a keyword search across the listing remarks rather than only the property-type field. That one request finds most of them. Now the two things that will actually shape your search. Zoning and permits. Whether a parcel can legally hold two dwellings is a local question, decided by Ada's planning office or Pontotoc County depending on where the property sits. Plenty of these setups exist without ever having been permitted. That is a real problem: an unpermitted second dwelling can mean you cannot insure it, cannot legally rent it, and cannot count it in an appraisal. Before you fall for one, ask for the permit history and call the planning office with the address. Financing. This is the part that surprises people. Conventional and FHA single-family financing generally does not accommodate two full dwellings on one parcel. Depending on how the second structure is classified, you may be pushed into two-unit financing, or you may find the property is simply non-conforming and your lender options narrow to portfolio lenders and local banks. Talk to a lender about the structure before you shop, because finding the perfect property and then discovering nobody will lend on it is a miserable way to spend two months. One more practical note. Appraisals on properties like this are difficult because there are few comparable sales, so appraisers sometimes assign little value to the second dwelling. That can work in your favor on price and against you on the loan amount. Go in expecting it. Given how thin this thread is, I would add: rural Oklahoma acreage is actually a good hunting ground for this, since the setups are common and the zoning is often more permissive than in town. Widen your radius beyond Ada city limits. This question is from 2021, so financing options and any state ADU rules may have changed. Confirm both currently. I am a real estate professional, not a lender or a land use attorney. I am Zoltan Peresztegi, a Realtor working the Palos Verdes Peninsula and the South Bay in Los Angeles County, where multigenerational buyers face exactly this problem with far less land to work with. Oklahoma is not my market, but if you want an introduction to an agent near Ada who handles acreage, ask and I will find one. Zoltan


