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Simpson St ADU

Portland, OR, USA

polyphon.com

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Published on 

Sep 23, 2025

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United States

Category:

RESIDENTIAL

ADU

Project Type:

Post Type:

Building

Country:

United States

Polyphon Architecture

Photographers:

Architects:

Polyphon Architecture & Design, LLC

Area:

575 ft²

Year:

2018

City:

Portland, Oregon

Construction:

Dave Rush

Client

Description:

the Architects

Text description by

The Simpson St ADU is a 575-square-foot Accessory Dwelling Unit in the Concordia neighborhood of Portland, Oregon, designed by Polyphon Architecture & Design. The project's unique solution was to place the ADU in front of the primary residence, which was set back far on the property, while still providing ample space for a driveway and access to the main house. The design addresses the narrow building envelope by using a split-level layout. This strategic arrangement allowed the ADU to maximize its internal space while remaining within the side setback requirements. The interior is efficiently organized to include distinct spaces for a bedroom, kitchen, and living area. Credits Architects: Polyphon Architecture & Design, LLC Location: Concordia neighborhood, Portland, Oregon.

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More Projects by

Polyphon Architecture

About

Polyphon Architecture:

Polyphon Architecture & Design is a Portland, Oregon-based architectural firm that specializes in sustainable, contemporary, and socially responsible residential, commercial, and mixed-use projects. Through a collaborative and multidisciplinary approach, the studio takes pride in creating high-quality designs with acute attention to detail, ensuring that the final built product embodies the same level of craftsmanship as the original design concept. The firm is recognized for its work on urban infill projects and accessory dwelling units (ADUs).

Category

ADU

Post Type

Building

Project Type

RESIDENTIAL

Country

United States

Year

2018

Area

575 ft²

Client

Photographers

Polyphon Architecture

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