Atlanta ADU Cost Guide (2026)

As Accessory Dwelling Units have become more common in Atlanta, one question comes up more than any other: what does it actually cost to build one?

The answer depends on two main factors: the size of the unit and the conditions of the property where it will be built. Trees, grading, utilities, and site access all influence the final cost.

Because ATL ADU CO works with a set of predesigned models that have been built dozens of times across Atlanta, we are able to provide reliable pricing expectations based on real projects rather than conceptual estimates.

One-bedroom Reynoldstown Accessory Dwelling Unit completed in Atlanta.

A Typical Example

Our one-bedroom Reynoldstown ADU typically falls in the low $200,000 range as an all-in project.

That number reflects the full scope required to deliver a permitted, finished detached accessory dwelling unit. In addition to the structure itself, site work, permitting, utilities, and project management all contribute to the overall project cost.

Other models may fall above or below that example depending on size and site conditions, which we evaluate during the feasibility phase.

One-bedroom Reynoldstown ADU completed in City of Decatur

What Is Included in That Number?

Our pricing is turnkey and includes everything required to move from concept to certificate of occupancy:

• Survey

• Site plan and feasibility review

• Architectural drawings and engineering

• Permitting and plan revisions

• Site work and foundation

• Framing, roofing, siding, and exterior finishes

• Insulation, drywall, flooring, and paint

• Kitchen and bath finishes

• Appliances (range, refrigerator, microwave, dishwasher)

• Stacked washer and dryer

• Plumbing, HVAC, and electrical

• Water and sewer connection to the primary home

• Project management throughout construction

We also coordinate directly with Georgia Power to establish a separate electrical meter for the ADU. Georgia Power connects the unit directly to the street and requires payment from the homeowner. Clients should budget approximately $4,000–$5,000 for that utility connection. Water and sewer connections are managed by our team and are included in the pricing above.

Two-Bedroom Expanded Kirkwood ADU with ADA features in City of Atlanta

Why Our Pricing Is Consistent

Every property is different. Trees, grading, soil conditions, site access, and utility distances all influence construction cost. What makes our pricing predictable is repetition.

We have operated with predesigned ADU models since 2018 and focus exclusively on detached ADUs. Our estimates are based on real projects, not conceptual numbers.

As Breanne in Edgewood shared:

“We worked with ATL ADU because the predictability in cost was huge for us. One contractor quoted us $300–$600 per square foot. ATL ADU’s pricing was much more transparent.”

Not all “all-in” pricing reflects the same scope. Site work, permitting revisions, and project management can significantly impact final cost. Our estimates account for the full process required to deliver a completed unit.

Kathy in Decatur noted:

“They had built this exact model time after time, and that experience reduces cost, chaos, and confusion. They were confident in their price.”

Two-story, Two-bedroom Ormewood ADU completed in Atlanta near the Beltline

From Range to Final Number

The example above is a starting point. To convert a range into a final estimate, we begin with a feasibility phase after a free consultative call to discuss zoning and site conditions (Atlanta ADU Zoning Guide).

Our feasibility phase typically costs $2,500 and includes a new survey. The survey confirms tree locations, lot coverage, topography, and any potential constraints such as easements or stream buffers.

With that information, we prepare a CAD generated site plan and evaluate the placement and orientation of your chosen model.

At the conclusion of feasibility, we provide a refined estimate and draft contract specific to your property. There is no obligation to move forward. If you choose to proceed, the feasibility fee rolls into the project as a deposit.

This structure allows homeowners to understand what is possible and what it will cost before committing to construction.

Studio East Lake ADU in Atlanta

What About Managing the Project Yourself?

Some homeowners choose to act as their own project manager. In certain cases that may reduce upfront cost, but it also means coordinating subcontractors, navigating permitting comments, scheduling inspections, and resolving field conditions as they arise.

Will in Reynoldstown explained it this way:

“We talked to others who had gone the DIY route and maybe spent less, but we didn’t want to be project managers or troubleshoot every detail. Working with someone who understood the permitting process was worth the turnkey service.”

For many clients, predictability and defined scope are more valuable than chasing the lowest possible number.

Street facing, corner lot, Beltline adjacent Reynoldstown ADU in Atlanta

Why ADUs Make Financial Sense

An ADU allows you to create new housing on land you already own. In many Atlanta neighborhoods, building a new one- or two-bedroom ADU is significantly less expensive than purchasing a comparable standalone home.

For homeowners and investors, an ADU can provide rental income, flexibility for family, multigenerational living, or future downsizing options while increasing the overall utility of the property.

Next Step

If you would like help evaluating your property, schedule a free consultation with our team.

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