ADU Questions · 2026
What Is an Efficiency Kitchen (JADU)?
An efficiency kitchen is the scaled-down cooking setup California law allows inside a Junior ADU (JADU): typically a cooktop, a small refrigerator, and a food prep counter, instead of a full range and full-size kitchen. It’s a code term specific to JADUs, not something you’ll find in a standard, freestanding ADU.
The short version: An efficiency kitchen is the smaller cooking setup state law permits for a JADU, a cooktop, small fridge, and prep counter rather than a full range. Standard ADUs, including every Framework First model, come with a full kitchen instead.
Why JADUs get a smaller kitchen
A JADU is a distinct category under California ADU law. It tops out at 500 square feet and has to be created within the existing walls of a single-family home, think a converted bedroom or a portion of the garage that shares structure with the house.
Because a JADU is small and physically part of the main home, state law doesn’t require it to have a full kitchen the way a standard ADU does. Instead, it allows an efficiency kitchen: enough to cook and store food, without the footprint of a full range and full-size cabinetry.
A JADU also has a feature no standard ADU has: it can require owner-occupancy, but only if it shares a bathroom with the main house. A JADU with its own bathroom doesn’t trigger that requirement. Either way, the efficiency kitchen is what makes a JADU function as a livable, separate unit even inside a tight footprint.
Efficiency kitchen vs. full kitchen: what’s the difference
| Efficiency kitchen (JADU) | Full kitchen (standard ADU) | |
|---|---|---|
| Cooking appliance | Cooktop (smaller than a full range) | Full range or equivalent |
| Refrigerator | Small refrigerator | Full-size refrigerator |
| Counter space | Food prep counter | Full counter and cabinet run |
| Where it’s allowed | JADUs only (up to 500 sq ft, within existing walls) | Standard detached or attached ADUs |
| Governing size limit | 500 sq ft max | Up to 1,200 sq ft under state law |
The practical difference is scale. An efficiency kitchen is built for a compact, budget-friendly unit that’s part of the main house. A full kitchen is built for a standalone home that needs to function completely on its own, whether that’s for a renter, an adult child, or aging parents.
What this means if you’re deciding between a JADU and a standard ADU
If you’re comparing a garage-conversion JADU to a detached ADU, the kitchen is one of the clearest lines between them. A JADU’s efficiency kitchen keeps the unit compact and inexpensive to build, but it also means less flexibility if you ever want the space to feel like a true independent home, for a long-term renter, for example, rather than a family member living just steps from the main house.
A standard ADU with a full kitchen gives you a completely self-sufficient unit. That matters for resale, for rental appeal, and for how comfortably someone can live there long-term. It’s also simpler from a design standpoint: no shared walls with the main home, no owner-occupancy question to sort out.
If you’re weighing the two paths for your own property, the county-specific rules that apply (setbacks, size caps, fees) can shift the math, so it’s worth confirming details with your local building department or through a Framework First feasibility study before deciding which direction fits.
Building with Framework First
Every Framework First model is a standard, detached ADU, which means every one of them includes a full kitchen, not an efficiency kitchen. Our 14 models range from 405 to 1,200 square feet, priced from $180,000 to $557,000 with a permitting budget built in along with plans, foundation, the factory build, delivery, utility hookups, appliances, and final inspection. Exact permit costs are set by your city and county, so they’re confirmed in your feasibility study, and property-specific site work like septic upgrades or retaining walls sits outside that listed pricing, though we handle it in-house as part of your contract. You can browse the full lineup at /models/ or run the numbers with our /calculator/.
If a full kitchen and a completely independent unit are what you’re after, whether that’s for rental income, aging parents, or adult children nearby, a standard ADU is the right structure. If you’re specifically trying to fit a unit inside your existing home’s walls on a tighter budget, a JADU with an efficiency kitchen may be worth exploring with a local designer or contractor who specializes in that path.
Frequently asked questions
Can a JADU have a full kitchen instead of an efficiency kitchen?
State law defines the JADU category around the efficiency kitchen concept, since JADUs are meant to be smaller, lower-cost units built within an existing home’s walls. Whether a specific full kitchen upgrade is allowed can depend on local interpretation, so confirm with your city or county building department if you’re set on a larger kitchen inside a JADU footprint.
What appliances count as an efficiency kitchen?
Generally, a cooktop, a small refrigerator, and a food prep counter, a scaled-down version of a full kitchen rather than a specific fixed list of brands or models. The idea is a functional cooking space sized to a compact unit, not a full range and full-size kitchen layout.
Is a JADU the same as an ADU?
No. A JADU is capped at 500 square feet and must be built within the existing walls of a single-family home. A standard ADU can be up to 1,200 square feet under state law and can be a fully detached, standalone structure. Every Framework First model is a standard detached ADU with a full kitchen, not a JADU. See /blog/jadu-vs-adu/ for a fuller comparison.
Does a JADU require owner-occupancy?
Only if the JADU shares a bathroom with the main home. If it has its own separate bathroom, owner-occupancy isn’t required under state law. This is different from a standard ADU, which never requires owner-occupancy regardless of layout. For more on how occupancy rules work across ADU types, see /blog/adu-owner-occupancy-rules-california/.
Why do Framework First’s ADUs come with full kitchens instead of efficiency kitchens?
Because every Framework First model is a standard, detached ADU, not a JADU. State law reserves the efficiency kitchen option for JADUs built within an existing home’s walls. Since our units are freestanding, crane-delivered homes, each one includes a full kitchen as part of the build price described above, permitting budget included.
Ready to see which full-kitchen ADU fits your lot? Start with a feasibility study or browse our 14 models.