What is the 2026 cost range for a interior conversion scope adu in Atlanta?

$81,000-$171,000, with the median landing near $126,000. The range reflects finish tier and layout complexity within the interior conversion scope; the Atlanta labor multiplier of 0.90× vs national median is baked in.

How long does a interior conversion scope adu take in Atlanta?

14-20 weeks of on-site construction for the interior conversion scope, plus 3-10 weeks of permit review in Atlanta if the scope requires a permit. Cosmetic-only refreshes often skip permits; anything touching plumbing, electrical, or structural does not.

What is the single biggest budget-overrun risk for this scope?

Existing slab without a vapor barrier — vapor-pressure moisture leads to flooring failure and mold if not re-poured or sealed. Adds $4-8K.

ADU — Interior conversion Cost in Atlanta, 2026

Low

$81K

$81,000

Median

$126K

$126,000

High

$171K

$171,000

Scope timeline: 14-20 weeksAtlanta permit window: 3-10 weeksUpdated 2026-04-24

Why interior conversion × Atlanta produces this band

A interior conversion scope for a adu in Atlanta combines two price levers: scope and metro labor rates. Interior-conversion ADUs repurpose an existing enclosed space (attached garage, basement) without adding foundation or framing footprint. Faster and cheaper than a detached build. Against the national median remodel labor rate, Atlanta runs 10% below the national median — so the interior conversion band comes in 50% below the mid-range, then scales 10% below the national median on top of that. Permit timelines for residential work in Atlanta typically run 3-10 weeks, which is the window you plan your design and decision sequence against. This page gives you the actual 2026 Atlanta bands for this exact combination, plus the three cost drivers Baily asks about first when scoping the project live.

What drives cost for a interior conversion scope

·Insulation and conditioned-space HVAC tie-in
·Egress window cutting and well install
·Kitchen and bath rough-ins (often net-new to the space)
·Legal separation from the primary unit

What makes Atlanta different

Labor — Non-union market with competitive trade supply — labor rates 10-15% below national median.
Labor — BeltLine neighborhoods (Old Fourth Ward, Inman Park, West End) generate remodel demand above metro average.
Labor — Climate-controlled remodel season is 10+ months; only late-July to August heat is a factor.
Material — Southeast lumber supply is competitive — Georgia Pacific plants nearby.
Material — Historic-district restrictions affect material sourcing in Candler Park, Druid Hills, Inman Park.

Atlanta rules that affect this scope

City of Atlanta Office of Buildings handles permits — turnaround varies from 3-10 weeks with a residential express lane available.
Historic preservation review affects remodels in the 10+ designated historic districts.
Tree Protection Ordinance requires payment into the Tree Trust Fund for any protected-tree removal, plus recompense planting.
DeKalb and Fulton County code amendments differ from City of Atlanta — matters for ITP vs OTP projects.

Scope your adu with Baily.

Baily asks the eight questions that determine where your project lands inside the $81K-$171K band for Atlanta and hands the scoped brief to one licensed builder.

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Questions LA homeowners actually ask

$81,000-$171,000, with the median landing near $126,000. The range reflects finish tier and layout complexity within the interior conversion scope; the Atlanta labor multiplier of 0.90× vs national median is baked in.