Custom ADU and home addition construction by Rip City Construction in Portland, Oregon

Portland ADU & Home Addition Contractor

Custom ADUs & Home Additions Built To Last

Expand your living space, increase property value, and build for the future with custom ADUs, home additions, garage conversions, and multigenerational living spaces built throughout Portland.

📍 Portland, Oregon

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Portland ADU & Home Addition Contractor

Designed For
The Way You Live.
Built For The Future.

Whether you're building a detached ADU, backyard cottage, guest house, garage conversion, or custom home addition, Rip City Construction specializes in creating high-quality living spaces throughout Portland, Oregon. Our team works closely with homeowners to design and build additions that increase property value, improve functionality, and provide long-term flexibility for growing families, multigenerational living, or rental income opportunities.

From foundations and framing to custom kitchens, bathrooms, and interior finishes, we manage every phase of construction with a focus on craftsmanship, communication, and lasting quality. Explore our completed ADU and home addition projects below.

ADU construction services infographic showing accessory dwelling unit design, permitting, framing, electrical, plumbing, HVAC, roofing, windows, and interior finishing services

Custom detached ADU built by Rip City Construction featuring Hardie siding, energy-efficient windows, and professional landscaping in Portland, Oregon

Featured Project

SW 78th Custom
ADU Construction

This custom detached ADU was designed and built to create a comfortable, fully independent living space. The project included complete site development, utility connections, custom kitchen and bathroom construction, energy-efficient mechanical systems, and high-quality interior finishes throughout. The finished ADU provides modern functionality, long-term durability, and valuable additional living space.

•Detached ADU Construction
•Site Development
•Foundation & Framing
•Hardie Siding
•Energy-Efficient Windows
•Custom Kitchen
•Quartz Countertops
•Designer Tile Backsplash
•Mini-Split HVAC
•Luxury Vinyl Flooring
•Full Bathroom
•Utility Connections

View Project Photos >

Featured Project

Nixon Basement
ADU Conversion

This custom basement ADU conversion transformed an unfinished lower level into a fully functional independent living space. The project included three bedrooms, two full bathrooms, a complete kitchen, custom stair construction, architectural wood paneling, premium finish carpentry, built-in storage, and modern lighting throughout. Designed to provide flexible living arrangements, guest accommodations, or multigenerational housing, the finished space blends seamlessly with the home's existing architecture while adding significant usable square footage and long-term property value.