We provide

architecture and design-build services

to our clients to assist in designing, planning, visualizing, and realizing your project in a collaborative environment.

For over two decades we have worked with a diverse range of clients from individual homeowners to city agencies. Through our design studio and building workshop rhiza A+D offers a rigorous design and development process from idea generation and planning, construction documentation and permitting, digital and physical modeling to full-scale prototypes and products.When designing architecture and public artworks we listen to and work closely with our clients through all phases of the project as needed; initial planning & programming, schematic design, design development, structural engineering coordination, energy analysis with mechanical, electrical and plumbing coordination, construction documentation, acquiring permits, bid & schedule estimating & negotiating and construction administration.When building public art or art installations our process starts with hand drawings and developments through parallel digital and physical modeling. Our workshop is an idea laboratory where wood, metal, plastics, foam, clay and re-purposed materials are shaped into beginning sketches and gestures of an idea. From here we move our concepts from paper, digital and sketch models into fabrication of full scale artworks.Our workshop supports our ability to create and fabricate in a range of scales. From architectural mock-ups & full-scale building components to the production of large scale sculptures and complex structures. The workshop is certified in steel and aluminum welding as well as equipped to assemble a wide array of materials as projects require. Our studio and workshop function in tandem to deliver innovative, efficient, tested and sustainable works of architecture and art.

We are

a design studio & building workshop

founded in 2005 and located in Portland, Oregon. Partners Ean Eldred, Richard Garfield, John Kashiwabara, and Peter Nylen have been working together since the mid 90's designing architecture and building public art, interior and exterior furnishings, lighting, gallery art installations and theater sets. Rhiza stems from the word rhizome- a root system that is collaborative, diverse, and adaptable. For us, bringing together unique and diverse perspectives is the root of creating durable, long lasting and adaptable design solutions.

With our roots in collaboration, we are committed to creating an inclusive work environment. Whether designing an individual client’s house or working with multiple stakeholders on a public art project, we value the unique perspectives offered by one another, our clients and communities. Experience has taught us that successful creative outcomes rely on collaborative problem solving, clear communication, shared goals. We love the world of making and sharing this world with others. We believe it’s a good idea to listen, since a good idea can come from anywhere.Through collaborating and building we realized ideas could be rapidly expanded and assumptions tested, a working process that has sustained us to today. We continue to believe in the physicality of making as integral to idea generation and the design process; where decisions made, become decisions felt.“No ideas but in things.”- William Carlos Williams.Whether designing or building, rhiza A+D’s practice is rooted in a respect for craft and a dedication to site sensitive place-making through the creation of cultural and climate sensitive objects and spaces.

We are a collaboration forward design studio. We believe a great idea can come from anywhere, so we listen.


News & Stories

Welcome to our News feed. Here you will find announcements, project updates and stories.

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Tel: 503. 281. 6829

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    rhiza A+D, Architecture + Design
    Based on 18 reviews
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    Kim GronroosKim Gronroos
    12:06 13 Sep 22
    An excellent design team. I used rhiza for a basement remodel and they were professional, knowledgeable, and passionate about my project and what we were trying to accomplish. Very happy with the results, and would use them again in the future.
    Mike NoonMike Noon
    01:03 17 Jun 21
    Given the fact that I had to recover with a broken arm AND I am 80 yrs of age...Ean's design of my bathroom saved more than the day...probably the rest of my safety and health. (Sanity as well!)It also is quite nice to look at each day ..colors, textures,shapes all work together.Ean got it just right !
    Meg BusseMeg Busse
    12:32 11 Mar 20
    they're the absolute best. smart, thoughtful, innovative, great listeners, and brilliant designers. this is the only A&D group I'd work with.
    Koni GKoni G
    20:05 10 Mar 20
    Hurray for NEW LOCATION! Rare gem of a business, even more rare gems of people inside. Incredibly mindful, creative, brilliant, and true artists -- we feel honored and blessed to have and continue to work together.