SFR + ADU + JADU: 3 Rentable Units on One California Lot (2026)
The existing house, a detached ADU, and a junior ADU — by right, with ministerial approval, in every city in the state. Here's exactly how the three-unit combination works under current law.
The single most valuable fact for a California investor in 2026: you can put three rentable units on one California lot — the existing house, a detached ADU, and a junior ADU — by right, with ministerial approval, in every city in the state. This post explains exactly how SFR ADU JADU three units one lot California works under current law.
The By-Right Combination: California ADU JADU By Right 2026
Government Code §66323 requires a local agency to ministerially approve, on a lot with a single-family dwelling, the combination of one ADU and one JADU. "Ministerial" means no discretionary hearing, no neighbor veto, no design review board. That's what California ADU JADU by right 2026 means: the city checks the boxes and issues the permit.
The Three Units
The House (SFR)
The existing or newly built single-family home on the lot — the primary dwelling that anchors the other two units.
The ADU
A detached accessory dwelling unit, no owner-occupancy requirement under §66315, rentable on standard leases.
The JADU
A junior ADU within the home's footprint, including attached-garage conversions, with its own separate bathroom.
No Minimum Lot Size ADU California
One of the biggest misconceptions is that you need a large lot. You don't. Under §66314(b)(1), there is no minimum lot size ADU California rule a city can impose, and §66321 voids any lot-coverage or setback standard that would block an 800 sq ft ADU with four-foot side and rear setbacks. A 5,000 sq ft lot carries the same right as an 8,000 sq ft lot — lot size affects only what physically fits.
JADU Own Bathroom, No Owner Occupancy — the 2026 Change
Before 2026, a JADU required the owner to live on the property. That's gone for units built correctly. Under §66333, amended by AB 1154 California effective January 1, 2026, a JADU own bathroom no owner occupancy rule now applies: if the JADU has its own separate sanitation facilities, owner-occupancy is not required. Share a bathroom with the main house and owner-occupancy can still be required — so the build spec is simple and non-negotiable: give the JADU its own bathroom.
The non-negotiable build spec: Standard ADUs already carry no owner-occupancy requirement (§66315), so all three units can be rented by a non-resident investor on leases longer than 30 days — no short-term rentals — as long as the JADU has its own bathroom.
California ADU JADU Size and Setback Requirements
The California ADU JADU size and setback requirements are set by statute so cities can't zone the units away:
| Element | Standard |
|---|---|
| Detached ADU max size | 1,200 sq ft (§66314(d)(5)) |
| JADU max size | 500 sq ft interior livable space, within the home's walls incl. attached garage |
| Side/rear setback | 4 feet max (§66314(d)(7)); conversions need none |
| Height (detached ADU) | 16 ft standard; 18 ft near transit; 25 ft attached |
| Fire sprinklers | Not required unless the primary home has them |
JADU Deed Restriction California — and Why It Protects the Exit
A JADU deed restriction California is recorded against the property, but read what it actually says: it only (a) prohibits selling the JADU separately from the house and (b) restricts the unit's size and attributes. It does not record an owner-occupancy covenant. It runs with the land and survives sale — so a future buyer inherits a fully rentable three-unit property. That's a clean resale story, not a burden.
- Prohibits separate sale — the JADU can't be sold off as its own parcel
- Restricts size and attributes — keeps the unit within the 500 sq ft / attached-footprint rule
- No owner-occupancy covenant — the restriction itself doesn't require you or a future buyer to live on-site
- Runs with the land — survives sale, so a buyer inherits a fully rentable three-unit property
Have a California Lot in Mind?
Send us the address. We'll confirm the by-right units, the buildable envelope, and what it takes to permit.
Review My Deal →FAQs
Yes for SFR + one ADU + one JADU — that combination is guaranteed by state law statewide. Some cities allow a second detached ADU (four units), but that is city-dependent, not a statewide right.
It must be within the walls of the proposed or existing single-family residence, which includes converting an attached garage. It needs an efficiency kitchen, a separate entrance, and — to skip owner-occupancy — its own bathroom.
Have a Lot That Could Carry Three Units?
Send us the address. We'll confirm the by-right unit combination, the buildable envelope, and the construction-to-DSCR financing that funds the build.
