Residential Real Estate Investment
Accessory Dwelling Unit (ADU) Cost & ROI Calculator
Calculate turnkey construction costs for garage conversions vs detached new builds, impact fee exemptions, monthly market rent, and cash-on-cash investment yield.
ADU Scope & Construction Type
Financial Returns & Cash Flow
Total Turnkey Project Cost
Construction + utility hookups + permits
Net Annual Cash Flow (NOI)
After 20% vacancy, tax & maintenance reserve
Cash-on-Cash Return & Payback
Unlevered cap rate yield
11.5% Cap Rate
8.7 Years Breakeven
Many states (e.g., California SB 9 / AB 68) now exempt ADUs under 750 sq ft from local development impact fees, saving $8k to $25k in upfront costs.