Hammer & Hand
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Hammer & Hand has been designing and building residential projects in Portland and Seattle for three decades, accumulating a portfolio that spans everything from full home renovations to passive house builds to custom ADUs. Over that 30-year span, the firm has observed how its clients use accessory dwelling units and has learned to design and build with remarkable flexibility. Some homeowners build an ADU to help aging parents live independently on the same property. Others build for rental income, viewing the secondary unit as a revenue stream and a hedge against rising property costs. Still others build studios or workshops, creating space for creative pursuits, professional practices, or hobbies that were previously squeezed into a garage or basement. Hammer & Hand's portfolio reflects this diversity, showing ADU projects that serve wildly different purposes and reflecting different design philosophies.
The firm operates with offices in both Portland and Seattle, maintaining a presence in both major regional markets. The Portland office is located at 1011 SE Lincoln St, and the Seattle office is at 2450 6th Ave S. This dual-market presence allows Hammer & Hand to serve homeowners on both sides of the Washington-Oregon border and to maintain institutional knowledge of the zoning, permitting, and design culture in each region. Portland's ADU market and Seattle's ADU market have evolved somewhat differently; Portland has become increasingly permissive with ADU zoning, while Seattle has built a strong design culture around accessory dwelling units. Hammer & Hand operates confidently in both contexts.
The company describes itself as a design-build firm rooted in contemporary building science, precision craftsmanship, and modern project management tools. This framing signals an approach that is not nostalgic or purely artisanal, but forward-looking and informed by current understanding of how buildings should perform. Buildings designed with modern building science are more energy-efficient, more durable, and more comfortable than structures built to older standards. Precision craftsmanship is not about labor-intensive handwork for its own sake, but about exacting standards applied throughout design and construction. Modern project management tools allow the firm to track progress, coordinate teams, and communicate clearly with clients in real time.
Hammer & Hand's service offerings are broad. The firm handles residential work including kitchens, bathrooms, additions, basements, whole-home remodels, and new home builds. The company also undertakes commercial projects, high-performance builds focused on energy efficiency and environmental performance, and custom woodshop work including cabinetry and specialty carpentry. This full-service model means the firm has developed expertise across many building challenges and project types. A kitchen remodel teaches the team about mechanical and electrical coordination; a passive house project teaches about thermal performance and air sealing; a commercial build-out teaches about code compliance in different contexts. All of this expertise translates into sophisticated ADU work.
The ADU portfolio showcases projects including the Glen Road Residence, Irvington ADU, Laurelhurst ADU, Cully ADU, Wine Lovers' ADU, Super-Efficient ADU, and Alameda Ridge ADU, each with its own character and design story. The naming suggests that these are not generic cookie-cutter builds, but custom projects responsive to their particular contexts and purposes. A project called "Wine Lovers' ADU" likely reflects a design tailored to how a specific client intended to use the space. An ADU named after the neighborhood (Irvington, Laurelhurst) signals that the design was informed by the neighborhood character. This naming practice and portfolio approach conveys that Hammer & Hand thinks about each ADU as a specific project, not a product to be replicated.
The firm's high-performance focus is worth noting for homeowners concerned with operating costs and environmental impact. Building science has advanced significantly in the past 20 years; homes designed with attention to insulation, air sealing, ventilation, and thermal mass will cost substantially less to heat and cool over their lifetime compared to structures built to older standards. If you are building an ADU and expect to own it for decades, or if you are renting it to tenants who will bear operating costs, the upfront investment in high-performance building delivers measurable savings over time. Hammer & Hand's emphasis on building science suggests the team will apply these principles to your ADU.
The firm has four primary service categories: Residential, Commercial, High Performance, and Woodshop. The Residential category encompasses the ADU work alongside kitchen and bathroom remodels, additions, whole-home renovations, and new construction. The High Performance category is distinct and reflects projects designed to passive house or near-passive house standards. The Commercial category handles non-residential projects. The Woodshop division performs custom cabinetry and architectural woodwork, including handcrafted furniture and specialty doors and windows. This organizational structure allows the firm to develop deep expertise in each area while maintaining the flexibility to apply high standards across all work.
The firm's emphasis on modern building science is increasingly important as energy costs rise and climate considerations weigh more heavily on homeowner decisions. An ADU built with contemporary understanding of insulation, air sealing, and thermal mass will cost substantially less to operate than an older standard structure. Over a 20-year or 30-year horizon, the energy savings from a high-performance ADU can amount to tens of thousands of dollars, making the upfront investment in building science worthwhile. For homeowners planning to rent an ADU, this performance advantage also translates to a competitive advantage in the rental market; tenants appreciate lower utility bills and comfortable interiors, and these features support higher rents and better occupancy rates.
Hammer & Hand's project names reflecting neighborhood or specific use cases (Wine Lovers' ADU, Super-Efficient ADU) suggest that the firm approaches each project as bespoke, not templated. This attentiveness to the particular client and the particular property is what distinguishes a truly custom builder from a production operation. The firm is unlikely to propose a one-size-fits-all solution; instead, the design process likely involves deep conversations about how the homeowner will actually use the ADU, what matters most to them, and how the new structure can fit both practically and aesthetically on their property.
Hammer & Hand's longevity in the market, its scope of work, and its commitment to building science make it an excellent choice for Portland or Seattle homeowners who want a custom ADU informed by 30 years of residential construction experience. If you are considering an ADU that serves a specific purpose, whether that is multi-generational living, rental income, or creative space, and you want a firm that will design with intention and build with precision, Hammer & Hand brings a depth of expertise and a portfolio that demonstrates their ability to deliver across diverse ADU applications.