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What is an

Accessory Dwelling Unit

ADU is fancy way of referring to a secondary suite on the same property. Some of the other common names of ADU include:

  • Granny flats

  • In-law units

  • Secondary dwelling units

  • Backyard cottages

  • Garden suites

Building an ADU in California brings numerous benefits to homeowners. Firstly, it provides a valuable opportunity to generate additional income by renting out the unit, helping to offset mortgage payments or supplementing the household budget. ADUs also offer the flexibility of hosting family members, providing a comfortable living space for aging parents or adult children while maintaining privacy and independence for everyone. Moreover, constructing an ADU can significantly increase the overall value of the property, serving as a wise long-term investment. Additionally, ADUs allow homeowners to make efficient use of their existing land and resources without compromising the integrity of the main residence. By capitalizing on unused space, homeowners can optimize their property's potential and contribute to addressing California's housing shortage. With financial benefits, flexibility, increased property value, and a contribution to the community's housing needs, building an ADU proves to be a rewarding choice for homeowners in California.


Avorino's ADU Building Process

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Pre-construction Consultation

It is essential to plan ahead and setting project goals, identifying future challenges, and creating a solid foundation for a successful construction project.

House Plan

Architectural & Structural Design

Our engineers and architects will work with you to understand your vision and will design a unique project based on your needs and preferences.


Often times our clients require financing to bring their construction project to life. Our financing partners offer up to 100% financing of your project with up to 30year terms with the option to re-finance.

Image by Glenn Carstens-Peters


Permits are crucial for almost all construction projects, ensuring compliance, safety, and legal authorization for the work to proceed successfully.

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Construction & Inspection

The construction phase is the heart of any construction project. The construction phase brings plans to life, involving skilled professionals executing the project with quality, coordination, and adherence to timelines.


Post-construction Relationship

At Avorino, we value long-lasting client relationships over one-time transactions. We are committed to nurturing and maintaining these connections, reflecting our dedication to client satisfaction and trust.

Convert Your Backyard Into
a Passive Income Generator


ADU Sample Floor Plans

Your ADU can be similar to any of these plans, or it can be designed very differently per your criteria.

Depending on your needs, we will design a custom floor for your project.


Elega Floor Plan 500sqft

This floor plan is ideal to accommodate up to 1-2 people.

Most common use cases:  • Romantic getaway (Airbnb)  • renting out to individuals  • Accommodating older parents or grown up children

Bellecielo Floor Plan ∼ 830sqft

This floor plan is ideal to accommodate 2-4 people.

Most common use cases:  •  Small families   • Older parents who need live-in nurse/ care givers  •  Grown up children moving back with the family  • College student housing

Casielo Floor Plan 1,200sqft

This floor plan is ideal to accommodate up to 5 people.

Most common use cases:  • airbnb targeting family vacation  • renting out to a family  • Older parents who need live-in nurse/ care givers

Your ADU Project - Step By Step Guide


Pre-Construction Phase:

Initial Consultation:

During the first meeting, our aim is to offer insights and information that assist the client in making informed choices. This includes guidance on whether to proceed with the project, scheduling, broad budget estimates, design concepts, and brainstorming. The brainstorming and the collaborative construction journey will persist throughout the project's lifespan.

Architectural & Engineering Drawings:

In this stage, you'll collaborate closely with our esteemed engineer or architect. Together, you'll develop a detailed custom plan tailored to your project. By the conclusion of this phase, you'll have architectural and structural plans, alongside structural calculations and T24, all prepped for submission to the City/County.


If you've already earmarked a liquid budget for your project, you can skip this step. However, if you require financing, we can connect you with our reputable lenders. They can facilitate financing for up to 100% of your project's value. They'll meticulously tailor a plan for you, focusing on what makes the most sense for you, by leveraging your property's equity, personal credit, etc.

Realistic 3D Rendering:

We offer premier 3D rendering services that allow our clients to visualize their projects long before they begin. Our detailed 3D depictions offer a virtual walkthrough, presenting an immersive preview of your project's final look. This early insight enables you to identify and address any design inconsistencies well in advance of them becoming real challenges.

City/County Approval Process:

After you've given the green light to the plans, they must be approved by City/County officials.

This ensures your plans align with the latest building codes, zoning regulations, setbacks, and more. Typically, the City/County officials send a few rounds of feedback that require clarification from the engineer. We handle this process for you. Should any changes be requested, our team will keep you informed.

Finished Material Shopping:

As the plans undergo review, we'll collaborate with you to select the finishing materials, including appliances, vanities, sinks, faucets, cabinets, countertops, and beyond. While you're free to source any of these materials from your preferred vendors, we may recommend against certain items if our experience suggests they might be of inferior quality.


Construction Phase:

Foundation & Framing:

At this stage, our attention centers on laying the foundation and framing your project. This encompasses footings, slabs, and the framing of walls and ceilings. After each component receives approval from City/County inspectors, we'll progress to subsequent phases.

Mechanical, Electrical, Plumbing (MEP):

In this phase, we'll concentrate on the mechanical, electrical, and plumbing components of your project. Every section undergoes a distinct inspection, and must be cleared by inspectors before we proceed to the next stages.


In this phase, we'll hang the drywalls, paint the house and lay down the flooring. We will install cabinets, vanities, and countertops as well as the outlets and switches, among other tasks. It's crucial that all finishing materials are purchased and delivered to the site before this phase.


Post-Construction Phase:

Final Touch Ups:

We understand no matter how meticulous our team is, there are always minor details involved in every project that may not be visible during the construction phase. Thus, we grant our clients a month or two to settle into their new space and identify any minor imperfections. Should they notice minor imperfections during this period, we commit to returning and addressing those issues at no additional cost.

Future Help:

We value fostering enduring relationships with our clients. Whether it's assisting you in finding tenants for your ADU or building your next home, we're eager to be a part of any upcoming construction endeavors you embark upon.

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