Ethos Design + Build

We are a Seattle area general contractor specializing in design-build projects ranging from new homes, substantial remodels, ADUs, and back yard cottages. We also operate our own custom cabinetry shop & woodworking services devision.

What We Do

AADUs, DADUs, and Backyard Cottages

From standalone backyard cottages to attached units, we handle design, permitting, and construction; turning underused space into functional living areas that add value to your property.

Custom Cabinetry and Interior Craftsmanship

With deep roots in fine woodworking and finish carpentry, we design and build custom cabinetry, built-ins, and interior details that bring character and quality to every room.

Custom Residential Construction

We take on whole-house remodels and select new-construction projects where our hands-on approach and planning expertise can deliver an exceptional result.

Pre-Construction and Project Strategy

Our pre-construction services include design coordination, cost planning, value engineering, and permitting; so your project is ready to build on a budget you understand.

Built on Experience. Driven by Craft.

Our story begins with years of hands-on building in a variety of environments; from custom homes and backyard cottages to commercial projects and even treehouses featured on national television. All of it grounded in shared values and a firm belief that quality craftsmanship and integrity are the foundation of every successful project.

As a small, dedicated team of builders and project managers, we focus on the details that make your project unique and personal. We guide you from concept to completion; navigating design decisions, permitting challenges, and budget realities with practical solutions and clear communication every step of the way.

Portrait of business owners Ian and Alex against the Seattle skyline

Cameron McKinnon

“Through his hands-on experience in the field, Alex brings real world knowledge of how projects are actually built. This allows him to approach budgeting, contracting, scheduling, and scope clarification with a depth of understanding that is hard to replicate. His ability to bridge the gab between the field and the office makes him an incredibly effective and respected project manager.”

Emily Nelson

"What truly sets Alex apart is his extensive hands-on field experience. Unlike many project managers who work primarily from an office, Alex has actually built what he manages. This practical knowledge allows him to anticipate challenges, develop creative solutions, and communicate effectively with constructions crews."

Scott Atkins

"Over my three decades in this industry, it’s rare to come across a partnership like Alex and Ian’s. Both bring a strong combination of project management expertise and hands-on construction knowledge, which gives them a well-rounded, practical approach from planning through execution.

Alex stands out as the most detail-oriented and organized PM I’ve encountered, while Ian is an exceptionally talented carpenter whose craftsmanship speaks for itself. Just as important, they operate with a level of integrity that’s hard to find. They communicate clearly, follow through, and do exactly what they promise. That balance of shared capability and individual strengths makes them an easy recommendation for any project."

Kalem A

"Ian built the cabinets in my kitchen and they came out beautifully. From concept to installation, there was excellent communication throughout. The craftsmanship is the kind you can only get from someone who's been doing this a long time. He took the time to match the wood grain and made sure everything was done the way he'd do it in his own home. My wife couldn't be happier with the outcome, and that's what truly matters."

Is an ADU right for me?

Before you get started you may have some questions. Visit our resources page for more information.