What Does ADU Mean in Real Estate?
ADU stands for accessory dwelling unit. It is a separate living space on the same property as a main home.
Quick answer. An ADU can be inside the main house, attached to it, or in a separate building. It has facilities for living, sleeping, cooking, and bathing. A finished basement or guest room alone may lack the features or approvals needed to qualify.
Common types of ADUs
- Interior. A self-contained unit within the main house, such as a converted basement.
- Attached. A unit built onto the main house.
- Detached. A separate unit, such as a backyard cottage or a converted garage.
For mortgage purposes, Fannie Mae describes the features and parcel requirements in its property eligibility guide.
Can an ADU add value or rental income?
Separate living space can be useful for relatives or guests. Its contribution to value depends on factors such as condition, legal use, and what buyers pay for similar homes. Construction cost and resale value are separate estimates.
Before counting on rent, confirm which rental uses are allowed and budget for vacancies, maintenance, insurance, and utilities. Ask your lender how it treats potential rent.
What to check in Oakland County
Start with the city, village, or township that governs the property. Ask the local planning or building office whether the unit is allowed at that address and what approvals apply. Review any association or deed restrictions. For an existing unit, ask for permits and final approvals.
Key takeaways
- Confirm local rules before building, buying, or renting out the unit.
- Compare similar sales before estimating resale value.
- Check lender and insurer requirements early.
Frequently asked questions
Is an in-law suite always an ADU?
The label alone tells you little. Check whether the space functions as an independent dwelling and whether the municipality recognizes the use.
Can I rent out an ADU?
It depends on the rules for the address and the intended rental term. Confirm local requirements and private restrictions before relying on income.
Recommended reading
Oakland County short-term rental buyer checklist
Tom Gilliam | RE/MAX Classic
For a conversation about comparable homes and local resale considerations, contact Tom Gilliam or call 248-790-5594.