ADU Cost Calculator
Our interactive calculator is being built with real contractor data. In the meantime, use our detailed cost guides below — they cover every ADU type with verified 2026 pricing.
Detailed Cost Guides
Real pricing data from contractor bids, permit records, and vendor quotes.
How Much Does an ADU Cost?Complete 2026 pricing by type, size, and region
ADU Cost Per Square FootWhy per-sq-ft costs vary and what drives them
Prefab ADU CostFactory-built pricing, delivery, and install
400 Sq Ft ADU CostBudget breakdown for one-bedroom units
Garage Conversion ADU CostConverting existing space for less
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