Avorino

ADU Construction Services by Avorino

Avorino is a contractor specializing in the design, permitting, and construction of accessory dwelling units (ADUs). Whether the goal is generating rental income, accommodating extended family, or simply making better use of available lot space, they handle the full process from initial plans through to final inspection.

An accessory dwelling unit is an independent residential unit located on the same lot as an existing home. Avorino works with several ADU types, giving homeowners options depending on their budget, lot layout, and goals.

1. Detached ADU: A standalone backyard cottage built separately from the main home. This option offers the most privacy and design flexibility, and is commonly used for rental income or multigenerational living arrangements.
2. Attached ADU: An addition connected to the existing home with its own private entrance. Sharing a wall with the main structure can reduce construction costs while still maintaining a fully independent living space.
3. Garage Conversion: An existing garage is converted into a permitted living space. This is typically the most affordable ADU option, with projects starting at around $75,000 and generally offering the fastest turnaround time.
4. Above-Garage ADU: A second story is added above an existing garage. This approach preserves parking and yard space while adding usable living area to the property.

What the Process Looks Like

Avorino structures their ADU projects in three main phases, with an average total timeline of 10 to 14 months from design through to move-in.

1. Design (4–6 months): Custom architectural plans, structural engineering, and Title 24 energy calculations are all included in this phase. The design work is tailored to the specific property and local requirements.
2. Permits (included in design phase): Avorino submits permit applications to the relevant city and manages all plan-check corrections and approvals on behalf of the homeowner.
3. Build (6–8 months): Construction is carried out by a licensed crew. Homeowners receive weekly progress updates, and the goal is on-budget delivery from foundation through to final inspection.

The average project cost for an ADU built by Avorino falls in the range of $250,000 to $400,000, depending on the type, size, and complexity of the unit. Garage conversions represent the lower end of the cost spectrum, while detached ADUs and above-garage builds tend to fall higher.

A Practical Option for Homeowners

For homeowners considering an ADU — whether a detached backyard cottage, a garage conversion, a granny flat, or an in-law suite — Avorino offers an end-to-end service that covers design, permitting, and construction under one roof. Their involvement throughout the permitting process in particular can reduce the administrative burden that often comes with ADU projects.

As an ADU builder operating across their service area, Avorino positions itself as a single point of contact for what is often a complex, multi-phase construction process.