2026 Side-by-Side
ADU / Garage Conversion vs Addition Cost
ADU / Garage Conversion runs about 82% more than Addition in 2026. Here's the full breakdown.
National typical
ADU / Garage Conversion
$158,850
$95,310–$254,160 range
Full guide
National typical
Addition
$87,368
$47,655–$142,965 range
Full guide
| 2026 Cost | ADU / Garage Conversion | Addition |
|---|---|---|
| Low range | $95,310 | $47,655 |
| Typical | $158,850 | $87,368 |
| High range | $254,160 | $142,965 |
ADU / Garage Conversion vs Addition Cost: FAQ
Which costs more, ADU / Garage Conversion or Addition?
ADU / Garage Conversion costs more — about $158,850 typical versus $87,368 for Addition in 2026, roughly 82% higher. Ranges overlap at the margins, so scope and finish level can flip the math on any individual project.
What's the 2026 cost range for ADU / Garage Conversion vs Addition?
ADU / Garage Conversion: $95,310–$254,160 (typical $158,850). Addition: $47,655–$142,965 (typical $87,368). Figures reflect a national-average cost index.
Why does one project cost more than the other?
The difference reflects scope, square footage, materials, and labor intensity. RemodelerIQ breaks every bid into labor-vs-materials so you can see exactly where the money goes.
Got a bid for either?
We audit your contractor's estimate against live local wage data to flag padded scope and hidden margins — free.
Data sources: Zonda Cost vs Value 2025; Houzz 2024 Cost Guides; BLS OEWS 2023; FRED regional price indices; Reddit homeowner & contractor reports.
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