What is an Accessory Dwelling Unit (ADU)?

An Accessory Dwelling Unit (ADU), sometimes referred to as a granny flat, in-law unit, secondary suite, or backyard cottage, is a self-contained residential unit that is located on the same property as a single-family home. ADUs are designed to provide independent living quarters and typically include sleeping, cooking, and bathroom facilities.

ADUs can take various forms, including:

  1. Detached ADUs: These units are separate structures from the main dwelling, such as a standalone cottage or converted garage.

  2. Attached ADUs: Attached ADUs are connected to the main house, often as an addition or conversion of existing space like a basement or attic.

  3. Junior ADUs (JADUs): Junior ADUs are smaller units that are created within the existing footprint of a single-family home, typically by converting a portion of the home's interior space, such as a spare bedroom or underutilized area.

Why an ADU?

ADUs offer several benefits, including providing additional housing options, accommodating multigenerational living arrangements, generating rental income for homeowners, and contributing to more efficient land use within urban areas. They can also help address housing shortages, promote affordability, and support sustainable development by utilizing existing infrastructure and resources.

It is now easier than ever to construct an Accessory Dwelling Unit (ADU) in Southern California. The City of Los Angeles has recently implemented new regulations regarding ADUs. Key highlights of the new ADU regulations in Los Angeles include:

  • Streamlined Permitting Process

    The city has streamlined the permitting process for ADUs to make it easier and faster for homeowners to build these units. This includes reducing processing times and simplifying application requirements.

  • Expansion of ADU Types

    The new regulations allow for various types of ADUs, including detached units, attached units, and conversion units within existing structures like garages or basements. This offers homeowners flexibility in designing and constructing ADUs that suit their needs and property constraints.

  • Relaxation of Parking Requirements

    Parking requirements for ADUs have been relaxed in certain areas, making it easier for homeowners to add these units without the need for additional parking spaces. This change acknowledges the potential for ADUs to reduce reliance on cars and promote more sustainable transportation options.

  • Increased Allowable Size

    The maximum allowable size of ADUs has been increased, providing homeowners with more space to accommodate living needs. This change enables the construction of larger units that can better serve families or individuals requiring more living space.

  • Affordability Incentives

    In an effort to address housing affordability issues, Los Angeles offers incentives for homeowners who rent out ADUs at affordable rates. These incentives may include fee waivers or expedited processing for homeowners who participate in affordable housing programs.

  • ADU Financing Programs

    To assist homeowners with financing the construction of ADUs, the city may offer low-interest loans or grants through various housing assistance programs. These financial incentives aim to encourage the development of ADUs as a means of increasing the housing supply.