How Do We Find a Home With an In-Law Suite or Finished Basement in Metro Atlanta?

How do we find a home with an in-law suite or finished basement in metro Atlanta? Write down who will use the space and how, search under every name that space can go by, and then check what the records say about those rooms before your due diligence period ends. Our team searches more than one term and more than one MLS, and we read the square footage split with you.

One lower level can carry four names. A listing may call it an in-law suite. An appraiser following Fannie Mae's guide calls it below-grade. A county may call it an accessory dwelling unit. The person moving in will call it my room. This search holds all four names at once, and the last one comes first.

This guide is from Andrew and Jassey Nguyen. NRG Nguyen Realty Group is a real estate team with Keller Williams Realty Peachtree Road helping buyers in Atlanta, Georgia find a home with an in-law suite or finished basement and read what that space is on paper.

What should we write down before we search?

Begin with an ordinary weekday in the life of the person who will use the space, and ask them about it directly.

• Who will use the space, and for what: daily living, long visits or a future plan?
• How many steps sit between the car and the bed, and between the bed and the kitchen?
• Does a full bath need to be on the same level?
• Will they cook full meals there, or would a sink and a small refrigerator be enough?
• Do they want a door of their own?

The last two answers deserve extra care. As the sections below explain, a full kitchen and a separate entrance bring a lender's definitions and a county's zoning rules into the conversation.

If senior living is still on the table, our guide on selling before or after moving a parent into senior living covers that side of the move.

What words should we search for?

The words sellers and agents use vary, so one term can leave out a home that fits. As our team's practice, we search several: in-law suite, mother-in-law suite, guest suite, finished basement, terrace level, walkout, second kitchen, kitchenette, basement apartment and separate entrance, along with different spellings of each. We search by feature too, such as a full bath on the lower level, and our team checks both FMLS and Georgia MLS, two listing services agents use here.

"In-law suite" tells you what someone chose to call the space. Whether it has a full bath, a stove, its own door or a permit is something to check, room by room and record by record.

How do we read the square footage?

Here is what our team sees in those two services, and how we work with it. FMLS's square footage folds finished basement space into the total. Georgia MLS shows above grade and below grade finished area separately. So our team reads the split.

Say a listing shows 4,000 square feet in FMLS. Georgia MLS might show that same home as 2,500 above grade and 1,500 below grade. Those figures are made up, to show the reading. We keep both numbers in front of you, the total you would live in and the split an appraiser would report.

The split also shapes how we compare prices. Our team's own practice is to compare a home with a finished basement to recent sales that also have finished basements.

How would a lender's appraiser read this space?

For a lender following Fannie Mae's guidelines, the Selling Guide's section on the improvements part of the appraisal report says, "Fannie Mae considers a level to be below-grade if any portion of it is below-grade, regardless of the quality of its finish or the window area of any room." It goes on, "Therefore, a walk-out partially below-grade area with finished rooms would not be included in the above-grade square footage or room count."

So a bedroom on a terrace level may appear in a listing's bedroom count and still sit outside the above-grade room count on the appraisal.

The appraiser still accounts for those rooms. The same section says, "Rooms that are not included in the above-grade room count may add substantially to the value of a property, particularly when the quality of the finish is high." And then, "For that reason, the appraiser should report below-grade areas separately and make appropriate adjustments for them on the Basement & Finished Rooms Below-Grade line in the Sales Comparison Approach adjustment grid." That grid is where the appraiser sets the home beside comparable sales, and the finished basement gets its own line there.

The guide sends lenders using version 3.6 of its Uniform Appraisal Dataset to a separate policy supplement, so ask your lender which rules apply to your loan. Our article on what happens if the appraisal comes in low in Georgia covers what follows if the value and the price disagree.

When does a suite become a separate unit?

For a lender following Fannie Mae's guidelines, the answer turns on what the space contains. The guide's section on special property eligibility says an accessory dwelling unit, or ADU, "must provide for living, sleeping, cooking, and bathroom facilities and be on the same parcel as the primary one-unit dwelling." It lists "a living area in a basement" among its examples.

The guide says the ADU must have these features separate from the primary dwelling: "means of ingress/egress, kitchen, sleeping area, bathing area, and bathroom facilities." Ingress and egress are the ways in and out. It adds, "The ADU may, but is not required to, include access to the primary dwelling. However, it is not considered an ADU if it can only be accessed through the primary dwelling or the area is open to the primary dwelling with no expectation of privacy."

The kitchen must contain, at a minimum, cabinets, a countertop, a sink with running water, and a stove or stove hookup, and the guide says hotplates, microwaves and toaster ovens are not acceptable stove substitutes. Two more sentences are worth reading slowly. "An independent second kitchen by itself does not constitute an ADU." And, "The removal of a stove does not change the ADU classification."

The appraiser also determines whether the home is a one-unit property with an ADU or a two- to four-unit property, based on characteristics that "may include, but are not limited to, the existence of separate utility meter(s), a unique postal address, and whether the unit can be legally rented." If a lower level has a stove, a door or a meter of its own, tell your lender early and ask how it would be treated.

Was the finished space permitted?

Ask, and then check. Take one county as an example. Cobb County's residential permitting page says its Inspections office administers and enforces building codes "in the permitting jurisdiction of the unincorporated areas of Cobb County," and it lists Basement Finish among its residential permitting checklists. The county's online permit portal lists a search for permit applications under Building Permits and says registration is required for all services except code enforcement complaints. Its address lookup shows the jurisdiction for an address in Cobb. If the address falls under a city or another county, ask that building department the same question.

Ask the seller in writing who finished the space, when, and under what permit. Then ask the building department what its record shows for the address. A missing record can raise a question on the loan side too. Fannie Mae's guide says, "If the appraiser identifies an addition(s) that does not have the required permit, the appraiser must comment on the quality and appearance of the work and its impact, if any, on the market value of the subject property." The guide's word there is addition, so ask your lender how it would read for a basement finish.

Is a kitchen or separate unit allowed where the home sits?

That answer belongs to whoever zones the address, and it can change. Take unincorporated Cobb County. On October 27, 2026, its Board of Commissioners adopted amendments to the county's zoning code that address accessory dwelling units. As adopted, Cobb's code says an ADU "means a residential dwelling unit subordinate to the principal single-family dwelling unit on the same lot," and that it "may be either attached to or detached from the primary structure."

Cobb's summary of uses marks an accessory dwelling unit SLUP, short for special land use permit, in the R-80, RR, R-40, R-30, R-20, R-15 and R-12 districts, and leaves RD, RA-4 and RA-5 blank. The county's explainer, written before the vote, described that permit as one approved by the Board of Commissioners.

The conditions in Cobb's section on special land use permits include this one: "ADU accessed from a separate entry from the primary structure shall require a special land use permit." They also include a size limit, a rule that the ADU be connected to the utility meters of the primary structure, a rule that the ADU be located only in the rear yard, no short-term rental of either structure, and a rule that the owner reside in either the primary dwelling or the ADU. An applicant signs an affidavit that the ADU is not in conflict with any applicable covenants, conditions, deed restrictions or bylaws, so read those too.

The same code says a single-family dwelling unit "shall have an interior bathroom and complete kitchen facilities, permanently installed. All rooms in a dwelling unit shall be accessed through the common front door."

Those lines raise questions to put to the county. Does this lower level, with its kitchen and its door, count as an ADU? Was it approved? How do the 2026 rules treat a space built before them? Cobb's zoning maps page offers a viewer you can search by address, and it says the county's Zoning Division has jurisdiction over unincorporated Cobb while cities regulate zoning within their own limits. Elsewhere, ask whoever covers the address.

Then bring the answer to your lender. For an ADU not allowed under zoning in any circumstance, Fannie Mae's guide lists additional conditions for the property to be eligible, including that the lender "confirms that the existence will not jeopardize any future property insurance claim that might need to be filed for the property."

What should we raise during due diligence?

Our guide to the due diligence period in Georgia explains how that window works. A space like this adds to what has to fit inside it. These steps are practical guidance to fit to your home.

1. Before you write the offer, list everything you want answered about the space, and ask how quickly each person can work. Choose the length of your period with that list in hand.
2. On the first day, send the seller your written questions about who finished the space, when, and under what permit.
3. Ask the building department for its permit record, and ask the zoning office about the kitchen and the entrance.
4. Ask your inspector to spend time on that level: moisture, the stairs, the door to the yard, the kitchen connections and the ways out of any room used for sleeping.
5. Tell your lender what the space contains, and ask how the appraisal would treat it.
6. Describe the space when you request your homeowners insurance quote.
7. If the plan includes changes, get a contractor's estimate and ask the building department what they would require.
8. Read the answers together before the deadline, and ask your attorney how your contract handles anything still open.

What mistakes make this search harder?

Stopping at one search term. The home that fits may be listed under a word you did not try.

Treating the total square footage as one kind of space. Read the split before you compare prices.

Assuming a rule travels. Cobb's 2026 amendments are for unincorporated Cobb. An address under a city or another county needs its own answer.

How could this play out for one household?

This is an example, not a real client.

Say a household is planning for a parent who cooks for themselves and would like a door of their own. Our team searches the terms above in both services, and one home appears as a terrace level with a second kitchen.

Say FMLS shows 3,600 square feet, and Georgia MLS splits it into 2,200 above grade and 1,400 below. Our team compares the home with recent sales that also have finished basements, and the household writes an offer with enough due diligence days to get answers.

On the first day, they send the seller written questions. The answer gives a year for the basement work and no permit number. The household asks the building department what it has on file and the zoning office about the kitchen and the outside door. The inspector looks at moisture and the ways out of the bedroom. The lender hears about the stove and the door.

With those answers on one page, and their attorney's read of the contract, the household decides before the deadline whether to go forward, ask for something or end the contract.

Frequently asked questions

What is the difference between an in-law suite and an accessory dwelling unit? None of the official pages we read for this guide defines "in-law suite." It is a phrase you will see in listings. Accessory dwelling unit has definitions in Fannie Mae's Selling Guide and, for unincorporated Cobb, in the county's zoning code.

Does a finished basement count toward square footage in Georgia? It depends on who is counting. Our team sees FMLS fold it into the total and Georgia MLS show it separately. For a lender following Fannie Mae's guidelines, the appraiser reports below-grade areas separately and makes adjustments for them on their own line.

Can we add a kitchen to a basement in Cobb County? Ask Cobb County Community Development before you count on it, and tell them about any separate entrance. Its residential permitting page lists a Basement Finish checklist, and its zoning code was amended on October 27, 2026. If the address is inside a city, ask that city.

Start with the person

The search begins with one person's ordinary day and ends with a stack of answers about the rooms that will hold it. Our team can run the search with you and help you check those records.

NRG Nguyen Realty Group is a real estate team with Keller Williams Realty Peachtree Road helping buyers in Atlanta, Georgia find a home with an in-law suite or finished basement and read what that space is on paper.

Send us a message: nrgmovesyou.com/contact

Or book a 15-minute discovery call with our team: schedule a call

Andrew and Jassey Nguyen

NRG Nguyen Realty Group

Real Estate Agents in Atlanta, GA

678-743-1586

nrgmovesyou.com

This article is general information, not legal, lending, zoning or appraisal advice. Rules vary by loan and by address and can change, so talk with your lender, the county or city that covers the home, your inspector and a Georgia real estate attorney about your own purchase.