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An Overview of Accessory Dwelling Unit (ADU) Types in California

ADU stands for ‘Accessory Dwelling Unit’, which is a secondary housing unit on a single-family residential lot. These are increasingly popular for adding extra living space and can come in different types. Here are the main types of ADUs:


image source:the California Department of Housing and Community Development (HCD)


1. Detached ADU:

- A separate, standalone structure built on the same lot as the main home, resembling a small, independent house in the backyard. This type provides complete privacy and independence from the main residence.



2. Attached ADU:

Constructed as an extension to the existing home, this type shares at least one wall with the main structure but has its own entrance and utilities, making it somewhat integrated yet independent.



3. Garage Conversion ADU:

This ADU transforms an existing garage into a living space, which can be attached to or detached from the main home, providing a cost-effective solution for expanding living areas without building anew.


4. Interior ADU (Basement or Attic Conversion):

Utilizes spaces within the existing house, like the basement or attic, converting them into separate living areas. This type is ideal for utilizing underused parts of a home and often maintains a seamless integration with the main house.


5.Above-Garage ADU:

Built on top of an existing or newly constructed garage, this ADU offers living space above the garage structure, which is beneficial for maximizing property usage without expanding into the yard.


Each of these ADU types serves to provide flexible housing solutions that can be used for rental income, guest accommodations, or as living space for family members, adding both functionality and value to properties.


As a leading expert in light gauge steel structure construction in the Bay Area, Easy House is committed to providing every client with safer, more modern, and eco-friendly housing options. We offer comprehensive, one-stop ADU construction services, including full assistance with the entire permit process from application to approval, covering the following:


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Package 1 : Architectural + Permit application package
  • Architectural Services: Drawing and drafting of plans.

  • Structural Engineering

  • Surveying

  • Title 24 Compliance (T24)

  • Communicate with city officials and submit your plans on your behalf.

Will deliver full service when the permit approved by city. (Permit fee not included)


Package 2. From Permitting to Finish material hassle free one stops shop service

see our Model Home  2bed 2Bath 748sf ADU


Package 3: Custom-Build

If you want to custom-build your house and require a unique set of architectural plans, please Contact Us for a quote.


 






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