2024 Orange County ADU Cost Guide

What do I need to Know?

Auxiliary dwelling units (ADUs) can serve several purposes, come in several shapes and sizes, and can be customized as little or as much as you’d prefer. From prefab and modular models to a completely custom design, the cost of an ADU could range from around $150K to $400K. Where your ADU will fall within that range will mostly depend on the level of customization, its size, and the grade of finishes. A larger, luxury ADU could even exceed this average. 

We’re going to break down the main avenues you could take in adding an ADU to your home, their costs, and the possible features or benefits you could expect in each category.

CUSTOM ADU DESIGN & CONSTRUCTION

Price Range: $250K - $400K

We offer a variety of design services tailored to your customization level. Select a floor plan to initiate your design, opt for a pre-designed ADU for a straightforward approach, or fully customize every aspect for total control.

Our comprehensive construction services encompass all necessary steps to complete your project, including:

  • Site preparation
  • Permit acquisition
  • Laying the foundation for your ADU
Rest assured, the ADU design you select, guided by your budget and needs, will align with your financial boundaries and fulfill all your requirements.
A spacious living room with a high white ceiling and exposed black beams, featuring a brown leather sofa, black accent chairs, and a modern black coffee table.

Benefits of a Custom ADU:

select_check_boxCompletely custom floor plan
select_check_boxPerfect fit to your property size and shape
select_check_boxHand-selected finishes in every space
select_check_boxDesign specifically for rental income
select_check_boxIncrease property value
select_check_boxCoordinate design with the main home
A minimalist bedroom with a large wood-framed bed, white bedding, a tan leather armchair, abstract wall art, and a gold bedside wall sconce.

ADA-Compliant ADUs

Price Range: $300K - $400K

The need for a private and independent space is crucial, especially when standard homes don't meet specific requirements. Our ADA-compliant ADUs provide comfort and accessibility, offering families and individuals a much-needed solution.

Collaborate with our designers to tailor a design and select finishes that cater to your unique needs. Constructing an ADA ADU brings numerous advantages, including enhanced longevity and health, privacy beyond what the main house offers, financial savings over assisted living facilities, and deeper family connections. At ADUs by Avatar, we dedicate careful attention to crafting accessible living spaces, a commitment reflected in both the design and construction of our ADA ADUs. 

 

Our most popular ADA-Compliant ADU features:

select_check_boxWider doorways and hallways
select_check_boxEasy-to-access storage
select_check_boxNon-slip flooring
select_check_boxFlush thresholds
select_check_boxCurbless walk-in shower
select_check_boxCoordinate design with the main home

Junior ADUS

Price Range: $200K - $300K

A Junior ADU is an ideal solution for those seeking the advantages of an ADU but facing space constraints. Transforming a garage or a different part of your home into a compact living unit, a Junior ADU offers the same independence and privacy as a standard ADU.

These units, akin to studio or one-bedroom apartments, are excellently suited for various uses such as accommodating an elderly family member, serving as a home office, or providing a cozy retreat for guests. Additionally, a Junior ADU can enhance your property's value and functionality.

 

An open-concept living space with a modern interior. The foreground shows a part of a living area with a gray armchair and a brown leather sofa.

Common features of a Garage Conversion or Junior ADU:

select_check_boxStudio or one-bedroom apartment layout
select_check_boxFull bathroom
select_check_boxSeparate entrance from the main home
select_check_boxWet bar or compact kitchen
select_check_boxADA features for accessibility
select_check_boxIndependent patio or porch

Ready to Start Your ADU Project?

Get in Touch.

We’re ready to start working with you to bring your vision to reality. Fill out the form to tell us about your project, and we’ll reach out to you.