Accessory dwelling unit — Columbus, OH | AccessoryDwellingUnit Services

Looking for accessory dwelling unit in Columbus, OH? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Columbus and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

Frequently asked in Columbus

What's the first step for an ADU permit in Columbus?

How can I find the best ADU builder in Columbus?

What does 'accessory dwelling unit' mean in Columbus?

In Columbus, an 'accessory dwelling unit' (ADU) refers to a secondary housing unit on a single-family residential lot. This could be a basement apartment, an addition, or a detached structure. These units provide additional living space while adhering to city zoning and building codes. They are a great way to add value and functionality to your property.

Are there grants for accessory dwelling units in Columbus?

While specific ADU grants can change, it's always worth exploring available programs in Columbus. Sometimes, local or state initiatives offer financial assistance for affordable housing projects, which can include ADUs. The pros can advise if any such programs are currently active and applicable to your situation. It’s wise to inquire about all potential funding options.

What's the process for ADU building in Columbus?

What are the benefits of a detached accessory dwelling unit in Columbus?

A detached accessory dwelling unit (DADU) in Columbus offers excellent privacy and flexibility. It can serve as a rental unit, a home office, or living quarters for family. DADUs often have minimal impact on the main house's footprint. They can be designed to complement your existing home's architecture. This makes them a versatile addition to your property.

Also serving nearby: Dayton · Cincinnati · Akron · Toledo · Cleveland

All cities in Ohio →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

913,175residents

4,137per sq mile

8ZIP codes served

Serving all of Columbus — population 913,175; about 4,137 residents per square mile across 220.7 sq mi. ZIP codes covered include 43085, 43201, 43202, 43203, 43204, 43205, 43206, 43207.

Neighborhoods served in Columbus: Short North, German Village, Clintonville, Victorian Village, Grandview Heights, Downtown Columbus — and every surrounding area.