about
Who We Are
Grummer Architecture is a boutique residential design firm in Portland, Oregon. We create bespoke homes and remodels that reflect how you live—modern yet timeless, beautiful and functional.
We believe in thoughtful design that supports your everyday life. With a collaborative approach, lasting materials, and a commitment to detail, we tailor every project to your vision. The result: homes that feel grounded, personal, and built to endure.
our values
We believe that designing a home is deeply personal. Every project begins with listening—so we can translate your vision into something enduring, refined, and entirely your own.
We prioritize collaboration, clear communication, and a design process that feels organized and human. Materials are selected with care, and details are shaped to stand the test of time—not just in quality, but in meaning
collaboration
We see our clients as partners, guiding them through a process that’s clear, creative, and responsive.
Personalization
Every home we design reflects the rhythms and values of the people who live there.
enduring craftsmanship
We favor lasting materials and thoughtful details that support both long-term use and timeless aesthetics.
Meet Sean Grummer
Sean Grummer is the founder and principal architect of Grummer Architecture. With degrees in Environmental Design and Architecture, Sean blends technical precision with a deep respect for craftsmanship and place. His work is rooted in clarity, collaboration, and thoughtful problem-solving, always focused on creating spaces that support the way people truly live.
Based in the Pacific Northwest and licensed in multiple states, Sean brings his calm, design-driven process to clients across a range of climates and contexts. Whether designing for the forested slopes of Oregon or the coastal light of Florida, he approaches each project with care, curiosity, and a commitment to homes that feel grounded, timeless, and personal.
Ready to Begin?
Whether you're exploring ideas or ready to start your project, we're here to support you.
Still exploring? Download the Design Investment Guide
Our Design Investment Guide breaks down each phase of the design journey, explains typical fees, and answers frequently asked questions about custom home projects. Download the guide to gain a clearer understanding of how we bring your vision to life, step by step.
Have a project in mine? Join the Waitlist
If you’re looking for expert support to help turn your vision into reality, consider joining our waitlist to work with a team dedicated to simplifying the process and making each decision manageable.