Portland ADU Design & Build — Serving Oregon & the Willamette Valley
Portland ADU Design & Build is a licensed and bonded ADU contractor serving homeowners throughout the greater Portland area and the Willamette Valley. Their team specializes in helping homeowners transform underused space into lasting value — whether the goal is rental income, multigenerational living, or long-term property appreciation.
An accessory dwelling unit is a secondary residential unit built on the same property as a primary home. Portland ADU Design & Build works across multiple ADU types, including:
- Detached ADUs — stand-alone backyard cottage builds offering privacy and strong rental appeal
- Garage conversion — transforming underutilized garages into fully independent living spaces
- Basement & interior ADUs — maximizing existing square footage within the home
As a full-service ADU builder, they manage every phase of the project — from site analysis and feasibility through architectural design, engineering, permitting, construction, and final inspection. Homeowners never have to coordinate multiple contractors or navigate complex regulations on their own.
A Streamlined Design & Build Process
Portland ADU Design & Build follows a structured, step-by-step process designed to make the experience as smooth and transparent as possible. Their approach covers:
- Site Evaluation — assessing zoning, utilities, placement options, and overall feasibility
- ADU Type Selection — helping determine whether a detached ADU, garage conversion, or basement conversion is the best fit
- Preliminary Design — interior and exterior concepts tailored to the property and the homeowner's vision
- Cost Review & Budget Planning — clear pricing and realistic expectations before any work begins
- Permit Application & Processing — handling the full regulatory process on the client's behalf
- Construction & Final Inspection — quality craftsmanship from foundation to finishes
As an elite FIR contractor, Portland ADU Design & Build holds the exclusive privilege of working with a single inspector on qualifying projects. This streamlines the permitting process, accelerates construction timelines, and improves financial efficiencies for their clients.
Transparency is central to how they operate. Their collaborative construction software gives clients real-time access to project schedules, on-site progress photos, cost summaries, and direct communication. During the design phase, 3D modeling ensures homeowners know exactly what to expect before a single nail is driven.
Built for Energy Efficiency & Long-Term Value
At an average of approximately 800 square feet, ADUs are naturally energy-efficient structures. Portland ADU Design & Build takes this further by advising clients on energy-efficient systems, sustainable building materials, and smart design strategies that reduce long-term operating costs. The result is a smaller carbon footprint, lower utility bills, and a unit built to stand the test of time.
Founded in 2017, Portland ADU Design & Build partners with some of the Portland and Willamette Valley region's most skilled craftsmen. Their team has converted dozens of empty basements, unused garages, and open backyards into beautiful homes and income-producing rental properties. As a trusted accessory dwelling unit builder in the Pacific Northwest, they are deeply committed to unlocking value for families and creating alternative housing opportunities that strengthen local communities.
Whether someone is just beginning to explore what's possible or is ready to move forward with a project, Portland ADU Design & Build offers a free consultation to evaluate the property, clarify options, and design something built for lasting impact.
