ADU Service · Los Angeles

Junior ADU (JADU)

Junior ADUs (JADUs) are units up to 500 sq ft created within your existing home. Lower cost, simpler permitting, and powerful for rental income.

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200+ ADUs Built
Across LA County
15+ Years
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Junior ADUs: Maximum Value, Minimum Footprint

A Junior ADU (JADU) is carved out of your existing living space — converting a bedroom, bonus room, or attached garage into a self-contained unit up to 500 square feet. JADUs have simpler permitting requirements than full ADUs and can often be completed in a matter of months.

They're ideal for homeowners who want rental income or a space for family members without a major construction footprint.

Our JADU Approach

Small Footprint. Real Rental Income. Simpler Permitting.

JADUs are appealing precisely because they're lower-cost and faster to permit than a full ADU. But they have real compliance requirements that catch unprepared contractors. We've built JADUs within bedrooms, bonus rooms, and attached garages — and know exactly how to hit the 500 sq ft ceiling efficiently.

  • Interior space analysis to confirm JADU eligibility before any design work
  • Efficient layouts that maximize livability within the 500 sq ft cap
  • Simplified permit pathway — typically faster than full ADU plan check
  • Owner-occupancy requirement clearly explained upfront
  • Kitchen and bathroom design within tight spatial constraints
  • All-inclusive pricing — design, permits, and construction in one contract
200+
ADUs Completed
Including JADUs & conversions
$60K
Starting Price
All-inclusive JADU build
4.9★
Google Rating
From verified homeowners
500
Sq Ft Maximum
CA JADU code limit
Free Estimate

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Tell us about your property and your goals. We'll review your site and provide a detailed cost and timeline estimate — at no charge, with no obligation.

  • Property feasibility review at no cost
  • Realistic cost range based on your specific lot
  • Estimated timeline from design through occupancy
  • Response within 1 business day

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Common Questions

Junior ADU (JADU) — Frequently Asked Questions

What Los Angeles homeowners ask most before starting an ADU project.

What exactly is a Junior ADU (JADU)?
A Junior ADU is an ADU created entirely within the walls of an existing single-family home, typically a converted bedroom, bonus room, or attached garage. JADUs are capped at 500 sq ft, must have their own exterior entrance, and require a kitchenette (efficiency kitchen). They are a separate dwelling unit from the primary residence but share the same building envelope.
Does a JADU require owner-occupancy?
California law allows cities to require owner-occupancy as a condition of JADU approval, meaning the property owner must live in either the main house or the JADU. As of 2025, this requirement is still permitted for JADUs (unlike standard ADUs, where it was removed). We confirm your city's current JADU owner-occupancy rules during the free property assessment, as requirements vary by jurisdiction.
What is the maximum size of a JADU?
California state law caps JADUs at 500 sq ft. This is a hard ceiling, there is no variance or exception available. Most effective JADU conversions fall in the 300–500 sq ft range. Within that limit, we design layouts that maximize livability: efficient kitchen placement, a full bathroom, separated sleeping area, and natural light from the existing room's windows.
What kitchen requirements apply to a JADU?
A JADU must include a kitchen facility, but California allows an efficiency kitchen rather than a full kitchen. This means a sink, cooking appliance, and counter surface. A full-size range or dishwasher is not required, which makes the kitchen achievable within a tight footprint. We design JADU kitchens that meet code requirements while making the most of the available space.
Does a JADU need a separate bathroom?
A JADU must provide bathroom facilities. If the JADU has interior access to the main house, it may share the home's existing bathroom, but this is uncommon in practice. Most JADUs we design include a dedicated bathroom within the unit for practical tenant and owner use. A full bathroom adds cost but significantly improves the unit's livability and rental value.
How much does a JADU cost and how long does it take?
JADU projects start from around $60,000 all-inclusive, covering design, permits, and construction. Cost depends on the scope of conversion: an existing bedroom with a new kitchenette and bathroom runs less than a full interior reconfiguration. Permitting for JADUs is typically faster than a full ADU, plan check at LADBS runs 8–12 weeks for a straightforward JADU. Total timeline from design to CO is typically 5–8 months.

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Explore Your JADU Options

Find out if your home qualifies for a Junior ADU.