Planning
Home Addition or ADU: Which Direction Fits Your Seattle Property?
A clear comparison of two ways to add useful space, from daily connection to long-term flexibility.
An addition and an accessory dwelling unit can both create valuable square footage, but they solve different problems. The right direction depends on how the new space should connect to the household.
Choose an addition for connected living
An addition can expand a kitchen, create a primary suite, or improve shared living space while remaining part of the main home. It is usually the more direct answer when the family needs the space every day.
Consider an ADU for independence
An ADU can support multigenerational living, guests, a home office, or potential rental use. That independence also introduces separate access, utilities, privacy, and code considerations.
Study the site before choosing
Lot dimensions, access, utilities, trees, setbacks, and the existing structure all influence feasibility. A concept that looks simple on paper may need a different approach once the site is understood.
Begin with the use case, then verify what the property can support. That sequence prevents the format-addition or ADU-from becoming the goal by itself.
Planning a remodel? A short conversation can help you clarify the next step.Request an estimate