Which ADU type fits an Orlando lot?
Start with what is already on the property. A sound garage is usually the shortest path to a legal unit. An open rear yard points to a detached cottage. A tight yard with room beside the house suits an attached in-law suite. Then check the lot size, because the City of Orlando ties the largest ADU you can build to it.
How do the types compare in Orlando?
| Type | Where it goes | Orlando rule to know, as of October 2026 | Often fits when |
|---|---|---|---|
| Detached ADU | New building in the rear or side yard | Must meet accessory structure setbacks and cannot sit in front of the house | The yard is open and you want the most privacy |
| Garage conversion | Inside an existing garage | The main house still needs one parking space behind the front yard setback | The garage is structurally sound and outside the flood zone |
| Attached ADU / in-law suite | Addition joined to the house | Must meet principal structure setbacks; over 500 sq ft triggers duplex standards | A relative wants to live close by, with a door of their own |
| Garage apartment | Above a new or existing garage | Counts toward the 0.50 floor area ratio shared with the house | You need parking and a unit on a narrow lot |
Rules summarized from the City of Orlando ADU page. Neighboring cities use different rules; see service areas.
Which type usually costs the least?
Work inside an existing structure usually costs less than building new, because the slab, walls and roof are already there. A garage conversion is often the lowest-cost route, and a detached cottage or a garage apartment is usually the highest. National Angi figures are in our Orlando ADU cost guide.
Is design and permitting included?
Yes. Every project includes ADU design and permits: the survey, plans, engineering for Florida wind loads, and the city submittal. You can also hire us for design and permits alone.