Accessory dwelling unit construction cost

Looking for accessory dwelling unit construction cost in Columbus, OH? Call AccessoryDwellingUnit Solutions 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 budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

The cost of building an ADU depends on your choice of materials, the square footage, and whether you are doing a garage conversion or a new detached build. Site access and utility upgrades also play a big role in the final bill. Exact pricing confirmed free on the call.

Frequently asked in Columbus

What are the disadvantages of ADUs?

Potential disadvantages include initial construction costs and the fact that adding an ADU might slightly reduce your yard size. In Columbus, local ordinances aim to balance these factors. A professional consultation can help you weigh these aspects against the benefits for your specific property.

How much does an ADU cost in Ohio?

What are the rules for ADUs in Maryland?

This service is focused on ADU construction in Ohio. For information on ADU regulations in Maryland, you would need to consult local authorities in that state. Our expertise is specific to the Columbus area and Ohio building codes.

What are the rules for ADU in California?

California has specific state laws and local ordinances regarding ADUs. While these rules are designed to encourage ADU development, they can differ significantly from those in Ohio. Our focus is on navigating Columbus's unique zoning requirements.

Is ADU allowed in Maryland?

We specialize in ADU construction within Ohio. To determine if ADUs are permitted in Maryland, you'll need to research the local regulations for that specific state and its municipalities. Our knowledge base is centered on Columbus.

Grant programs for ADUs are often state or locally specific. While California has had such initiatives, they may not be available in Ohio. Discussing your project with us is the best way to understand potential costs and any available incentives in Columbus.

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, Victorian Village, Olde Towne East, Grandview Heights, Clintonville — and every surrounding area.