What Are the Different Types of Accessory Dwelling Units?

Interior Accessory Dwelling Units

It might seem like converting an existing basement into an ADU is a quick and easy way to add extra living space to your home. That's rarely the case.

Most cities have specific rules underlining the difference between a refinished basement and a basement accessory dwelling unit. Under California law, a basement ADU must meet all state building standards for a dwelling.

Some of the technicalities involved in building a basement ADU include:

• Ceiling height
• Ventilation
• Plumbing
• A separate kitchen and bathroom
• Ductwork
• Natural light
• An entrance

These aspects can delay your project, resulting in a loss of income if you plan to rent your ADU.

Attached ADU Options

Attached accessory units are additions to existing homes or an existing space that you convert into an ADU, like a garage or attic.

Adding a separate access point is usually the biggest consideration when you build an attached ADU. You'll also need to create fire and sound separation between your home and the ADU.

Some attached ADU options are easy conversions. For instance, if you're converting an existing room with an en-suite bathroom into an ADU, you only need to add a kitchen area and a new door.

If you don't have space for a backyard ADU, you can also build an attached ADU adjacent to your home in the form of a one- or two-story pop-out.

Detached Types of ADUs

These customized ADUs are the most versatile of all. Also known as granny flats, mother-in-law suites, or backyard cottages, these ADUs are tiny homes located close to the main dwelling.

You'll need to take all the usual building codes into account when building a backyard ADU, plus a few extras.

In some cities, the ADU must match the appearance of the existing home and comply with height limits. In most cases, you'll come across restrictions regarding how close you can build to your lot line.

Despite these challenges, detached accessory dwelling units offer two major benefits for homeowners. They're more private than the other types of ADUs, and you can charge higher rental rates for them.

Find the Perfect Fit for Your Home

Now that you're familiar with the basic types of accessory dwelling units, you'll discover the almost endless variety of customizations available.

That's where we come in. With 25 years of experience in the construction industry, ELS Home Builders is a top choice when it comes to designing and building your ultimate ADU.

Get in touch, and let's talk about your next home remodeling project.