Expand your living space without the stress.
Adjunct Designs delivers cost-effective, high-quality residential additions, handling everything from early concepts and permits to final construction.
Residential
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![An image of a one-bedroom DADU interior.]()
Detached Accessory Dwelling Unit
DADUs, Decks, and Landscaping
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![Shoreline Addition kitchen and living room interior.]()
Shoreline Addition
Residential Additions
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![Rainier Beach Remodel cutaway section]()
Rainier Remodel
Residential Remodels
Commercial
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![Cafe Calaveras interior with baristas making espresso.]()
Cafe Calaveras
Cafes, clinics, studio spaces…
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![Pidgin Cooperative Restaurant empty interior of the bar and dining space.]()
Pidgin Cooperative Restaurant
Restaurants, bars, pop-ups…
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![Adult Care Residence sketch interior.]()
Adult Care Residence Facility
Multi-unit residential, adult family homes…
Let’s Build!
From conceptualizing to constructing, we’re ready to take your dream and help move it into reality. We promise a client-centric approach that empowers ideas, eases concerns, and delivers a project that we’ll all be proud of.
About
Services
Residential Design
Renovation + Restoration
New Construction + Additions
Passive Housing Design
Accessory Dwelling Units - DADUs
Hybrid Spaces - Home Offices
Commercial Tenant Improvement
Restaurant, Bar + Cafe Design
Temporary Event Spaces and Structures
Who is Adjunct Designs?
Andrew “AJ” Johnston, Architect
Founded by AJ in January 2020, Adjunct Designs provides thoughtful, bespoke design solutions for residential and commercial clients throughout the greater Seattle area. With over 15 years of architectural design practice, AJ brings a seasoned eye, a practical approach, and a genuine curiosity to every project.
At Adjunct Designs, good design is about understanding how people live, work, and connect with their surroundings. AJ approaches each design problem as an opportunity to work with others to resolve issues creatively and tailor new spaces to the project’s needs. The result is design that feels personal, purposeful, and built to last.