// ADU Construction

ADU Construction in Orange County

Fully permitted accessory dwelling units — designed, engineered, and built by Avorino.

What Is an ADU

A second home on your property

An accessory dwelling unit is an independent residential unit on the same lot as a single-family home. It can be a detached backyard structure, an attached extension, or a converted garage.

ADU Types

Four ways to build

01

Detached ADU

Standalone unit in your backyard. Maximum privacy and design flexibility.

02

Attached ADU

Extension connected to your home with its own private entrance.

03

Garage Conversion

Convert your existing garage. Most affordable option, starting at $75K.

04

Above-Garage ADU

Second story above your garage. Keeps parking, adds living space.

Cost & ROI

The numbers

$250K–$400K
Project Cost
$2K–$4.5K+
Monthly Rental
5–12%
Annual ROI
8–15 yr
Break-Even
How It Works

Three steps to your ADU

Step 01

Design

4–6 months

Custom architectural plans, engineering, and structural calculations.

Step 02

Permits

(included)

We submit to your city and manage all approvals.

Step 03

Build

6–8 months

Licensed crew, weekly updates, on-budget delivery.

Get your ADU estimate