JADU (Junior Accessory Dwelling Unit)
An ADU up to 500 sqft carved out of an existing single-family home.
A Junior ADU is a separate dwelling — its own entrance, sleeping area, and an efficiency kitchen — created within the walls of an existing single-family residence. California law (Gov. Code §65852.22) caps JADUs at 500 sqft and requires the owner to live on-site in either the JADU or the primary home.
JADUs share the main home's bathroom or include their own, and may share utilities with the primary residence (no separate meter required). Permit fees are typically a fraction of detached ADU fees, and most cities approve JADUs ministerially in 4–8 weeks.
Related terms
- ADU (Accessory Dwelling Unit)A self-contained second home on a residential lot, with its own kitchen, bath, and entrance.
- AB 68 (Assembly Bill 68)2019 California law that streamlined ADU approvals and removed local barriers.
- Owner-Occupancy RequirementA city or state rule that the property owner live on-site as a primary residence.
People also ask
FAQ — JADU (Junior Accessory Dwelling Unit)
What does "JADU (Junior Accessory Dwelling Unit)" mean in plain English?
An ADU up to 500 sqft carved out of an existing single-family home. Browse the full construction glossary for related terms.
Why does JADU (Junior Accessory Dwelling Unit) matter for a California ADU or remodel?
JADU (Junior Accessory Dwelling Unit) comes up in the zoning and land-use side of nearly every Greater LA and Bay Area project we touch. A Junior ADU is a separate dwelling — its own entrance, sleeping area, and an efficiency kitchen — created within the walls of an existing single-family residence. Getting it right at design saves rework later — getting it wrong is one of the most common reasons permits stall. See how it lands in our five-phase process and the relevant field guides.
Where will I see JADU (Junior Accessory Dwelling Unit) on my own project?
Most owners run into JADU (Junior Accessory Dwelling Unit) during the design or plan-check phase — specifically inside schematic design or permit submittal. Your project manager flags it on the schedule, walks you through what the city expects, and confirms documentation is in place before the inspection that depends on it.
Does JADU (Junior Accessory Dwelling Unit) cost extra?
Sometimes — depends on whether it adds scope (a report, a structural detail, a fee) or just a paperwork step. Anything cost-impacting is itemized in your contract or change order, never buried in the invoice. Sanity-check your number with the ADU cost calculator and the 2026 cost report.
Who at Alpha Dream handles JADU (Junior Accessory Dwelling Unit)?
The project architect owns design-level decisions; the permit runner owns city interactions — see the California permit directory; the project manager owns field execution. You always know who to ask. Start a conversation on the contact page.
When does JADU (Junior Accessory Dwelling Unit) typically come up in the project schedule?
Most often during permit submittal or early construction. The full sequence is on the process page.
Is JADU (Junior Accessory Dwelling Unit) handled differently in LA vs the Bay Area?
Yes — local interpretation varies. The LA studio and Bay Area studio note the regional shifts on each city hub.
What documents prove compliance with JADU (Junior Accessory Dwelling Unit)?
City-specific — the California permit directory lists the form set per jurisdiction. Field journal entries show what actually clears plan check.
Which trades or consultants own JADU (Junior Accessory Dwelling Unit) on a typical job?
Architect, structural engineer, or Title 24 consultant — depends on the term. The process page maps roles across the five phases.
How does JADU (Junior Accessory Dwelling Unit) affect the project budget?
Direct line item in the contract when it triggers a report, detail, or fee. Pricing bands are in the 2026 cost report.
Has JADU (Junior Accessory Dwelling Unit) changed recently under California law?
California ADU and remodel law has shifted every legislative session since 2017. Material changes land first on the field journal; definitions update quarterly here.
Where can I read the underlying statute for JADU (Junior Accessory Dwelling Unit)?
Each glossary entry cites the relevant Gov Code, building code section, or city bulletin. The permit directorylinks the source portals.
Which ADU type is JADU (Junior Accessory Dwelling Unit) most relevant to?
Cross-references live on the ADU types index. The term often appears in detached ADU and JADU contexts most.
Can I send JADU (Junior Accessory Dwelling Unit) questions to your team?
Yes — use the contact page. We add the most-asked questions to the site-wide FAQ monthly.
What's a related term I should also read after JADU (Junior Accessory Dwelling Unit)?
Each entry cross-links 3–5 related terms. Browse the full set on the glossary index.
Plain EnglishOff-site · Leo replies tonight
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