What is an Accesory Dwelling Unit?

Also known as Granny Flat or Casita

In the home remodeling and home building world, ADUs are essentially small guest houses (typically 600 – 1200 square feet) and include a separate entrance, bathroom and small kitchen or kitchenette. Granny Flats can be detached or attached to the main house, and are typically found in the front of properties, but can also be located in the backyard. ADUs can be a great way to make your home work for multiple generations.

Types of Accesory Dwelling Units

A Detached ADU is an independent structure entirely separate from the primary dwelling, usually built in the backyard. As a rule, detached ADUs cannot be physically connected to the main residence in any way. A benefit of Detached ADU's is that the maximum ADU size is not linked to the size of the main dwelling, allowing for more freedom in design of spaces. Since Detached ADUs are independent structures, they offer the most privacy for everyone on the property. Existing buildings such as detached garages can be easily converted into detached ADUs. ADUs are typically 600 – 1200 square feet and include a separate entrance, at least one bedroom, at least one bathroom and a kitchen.

A Garage or Existing Structure Conversion ADU is a conversion of an existing garage or structure into into an independent living space. Suitable options for this kind of ADU are Garage, Attic or basement. As a rule, you can not change the original floor plan of the space you are converting int an ADU. Garage or Existing Structure Conversion ADUs are usually the cheapest option for construction, but they also provide the least privacy.

An Attached ADU is an addition, attached to the primary dwelling that must include a separate entrance, at least one bedroom and at least one bathroom. Attached ADUs must be isolated from the main residence. Attached ADUs can not be over 50% of the total floor area of the primary dwelling. Attached ADUs are perfect for housing elderly relatives, since they allow easy access from both dwellings. You can also use it as a Home Office or Home Gym.

How much does an ADU cost in San Diego?

At HJ Innovation Construction building ADU’s is our core business and we have an in-depth understanding of every element from planning and building regulations through to aesthetics. Our team is integrated by experts in each area, from design to electricity. Because of that, we can offer lower prices for top of the line products.