Los Angeles Junior ADU Guidelines & Requirements
Workplace Inspiration

Los Angeles Junior ADU Guidelines & Requirements

|Dec 7, 2023

Are you a millennial intrigued by the idea of innovative living spaces or expanding your property's potential? With the rising popularity of alternative housing solutions like container homes in California, tiny home kits, and the evolving California ADU law, it's no wonder that the concept of Junior Accessory Dwelling Units (JADUs) has become increasingly appealing. These compact and stylish prefab ADU units offer an affordable and sustainable living option that aligns perfectly with the needs of the modern generation.

Let's delve into JADUs, discovering their distinctive advantages and the reasons they're gaining popularity so rapidly among Angelenos.

Los Angeles Junior Accessory Dwelling Unit (JADU) Guidelines & Requirements

A Junior Accessory Dwelling Unit (JADU) is a small, self-contained living unit that is attached to an existing single-family home. JADUs are also known as granny flats, in-law units, or accessory dwelling units (ADUs).

JADUs are a great way to add additional living space to your home for family members, caregivers, or renters. They are also a more affordable and sustainable option than building a new home.

Here are some of the junior ADU Los Angeles requirements:

  • JADUs must be no larger than 500 square feet.
  • JADUs must have their own separate entrance.
  • JADUs must have a kitchen, but it does not need to be a full kitchen.
  • JADUs must have a bathroom, but it can be shared with the main house.
  • JADUs must comply with all applicable building codes

Los Angeles Junior Accessory Dwelling Unit (JADU) Guidelines & Requirements

Owner-occupancy Requirement

The owner of the property must occupy either the main house or the JADU. This means that you cannot rent out both the main house and the JADU.

Difference Between an ADU and a JADU

Accessory dwelling units are referred to as ADUs. Standing on the same lot as a single-family house, it is an independent living space. ADUs may be added to, removed from, or transformed from preexisting buildings.

Junior ancillary dwelling unit is what JADU stands for. Compared to a typical ADU, this kind of ADU is smaller. Junior ADU in Los Angeles can only be linked to the main home and can't be bigger than 500 square feet.

The following table summarizes the key differences between junior ADU vs. ADU:





Up to 1,200 square feet

No larger than 500 square feet


Can be detached, attached, or converted from existing structures

Must be attached to the main house

Bathroom requirement

Must have its own private bathroom

Can share a bathroom with the main house

Occupancy requirements

No owner-occupancy requirement

Owner of the property must occupy either the main house or the JADU

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Building a Jr ADU in Los Angeles

In Los Angeles, building a Junior Accessory Dwelling Unit (JADU) requires a straightforward approach. First, you need a building permit from the Los Angeles Department of Building and Safety. The LADBS website has valuable information on what you need to know.

Your JADU construction may begin after you have obtained the necessary permits. If doing it yourself doesn't appeal to you, you may always employ a professional.

Make sure to follow the rules from LADBS during the process. If you are in the market to buy a prefab ADU that has all the necessities you will need to spend your life, then make sure to check out Autonomous.ai. This online store has a ridiculous amount of variety for JADUs. You will not get better rates and features anywhere else with the kind of convenience they offer, so make sure to check them out.

Building a Jr ADU in Los Angeles

Why Are Los Angeles Homeowners Building JADUs?

Junior Accessory Dwelling Units (JADUs) are small living spaces attached to existing single-family homes, offering homeowners and communities additional space and income. Los Angeles homeowners are embracing JADUs for several reasons, including:

  • Affordability: JADUs are a cost-effective option, requiring less construction and permits than regular ADUs or container homes, leading to potential savings on utilities, taxes, and maintenance.
  • Versatility: With flexible usage options, JADUs can serve as living spaces for relatives, friends, or renters, as well as functioning as home offices, studios, or hobby rooms, easily integrating back into the main house when necessary.
  • Sustainability: By utilizing fewer resources and energy, JADUs contribute to a reduced environmental footprint. Incorporating eco-friendly features like solar panels, rainwater harvesting, and composting toilets further enhances their sustainable appeal.
  • Accessibility: JADUs address the demand for affordable housing close to workplaces, schools, and family, offering adaptability for individuals with diverse needs, including those with disabilities.

Why Are Los Angeles Homeowners Building JADUs?


1. How much does a Junior Accessory Dwelling Unit cost in LA?

The cost of building a Junior Accessory Dwelling Unit (JADU) in Los Angeles typically ranges from $50,000 to $100,000, considering factors such as size, design, and customization.

2. How long does it take to build a JADU?

The construction timeline for a JADU in Los Angeles generally spans between 3 to 6 months, encompassing various stages from design to permitting and construction.

3. ADU vs. JADU in Los Angeles: What are the key differences to consider?

While both ADUs and JADUs offer additional living space, they differ in size, independence, and regulatory requirements, making it essential to understand their unique characteristics before embarking on a construction project.

4. Is it possible to rent out a Junior Accessory Dwelling Unit (JADU) in Los Angeles?

The short answer is "yes," you may rent a JADU in the LA area. It's worth noting that JADUs are primarily for long-term rentals, and therefore short-term rentals like Airbnb or VRBO can be illegal in certain places. Before you decide to rent out your JADU, you should research the local ordinances and zoning restrictions.

rent out a Junior Accessory Dwelling Unit (JADU) in Los Angeles


Junior Accessory Dwelling Units (JADUs) have emerged as a practical solution for affordable living and additional income. With a rising demand for sustainable and adaptable living spaces, JADUs have gained significant popularity, showcasing the city's progressive housing trends.

Explore the various options offered by prefab houses in California and Los Angeles (read prefab ADUs in Los Angeles to know more). These customizable, eco-friendly container homes in California cater to your unique preferences. Whether you're considering an ADU or a JADU, these modern housing alternatives underscore the evolving dynamics of contemporary living, emphasizing the importance of flexibility and eco-consciousness in the heart of Los Angeles.

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