JADU (Junior ADU) ADU Cost in 2026
JADU (Junior ADU) ADUs typically cost between $60,000 and $150,000 in 2026.
Typical range
$60k–$150k
Per sqft
$150–$350
Where the money goes
Line-item averages for a typical ADU build. Actual percentages vary by site conditions and finish level.
Foundation
$25k–$45kFraming & shell
$60k–$120kMechanical / electrical / plumbing
$35k–$70kFinishes
$30k–$90kPermits & impact fees
$10k–$30kDesign & engineering
$15k–$35kJADU (Junior ADU) ADUs offer a specific tradeoff between cost, timeline, and flexibility. This guide breaks down typical pricing, line-item costs, and the key factors that affect your final budget.
Get a personalized estimate
Tell us about your project and we'll match you with verified builders for accurate quotes.
Get Free Quotes