Junior ADU (JADU) vs. Standard ADU
Compare Junior ADUs and full-size ADUs — size, cost, income potential, and which makes sense for your property.
JADU vs ADU Comparison
| Feature | Junior ADU (JADU) | Standard ADU |
|---|---|---|
| Max Size | 500 sq ft | 1,200 sq ft |
| Construction Estimate | Property-specific written estimate | Property-specific written estimate |
| Timeline | 3–5 months | 4–12 months |
| Rental Income | $1,000–$1,600/mo | $1,500–$3,500/mo |
| Location | Within existing home | Separate or attached |
| Kitchen requirements | Efficiency kitchen (sink + range) | Full kitchen |
| Can build both? | Yes — 1 ADU + 1 JADU allowed on same lot | |
Which Is Right for You?
Choose a JADU if: you want the most affordable ADU option, have an existing bedroom or room you can convert, and want to minimize disruption to your property.
Choose a standard ADU if: you want a truly independent unit with a full kitchen, more space, higher rental income, or a unit that feels like a separate home.
Build both: A JADU renting for $1,200/month plus a detached ADU renting for $2,500/month gives you $3,700/month in total rental income from one property.
Find out what's possible on your property
Free site evaluation — we'll tell you exactly what ADU types your property qualifies for.
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