
Specializing in ADU construction and related services in Seattle, WA.
Seattle and surrounding areas
On time and on budget
Fast, efficient, and high quality. Our ADU was done in under 4 months and looks fantastic.
Garage ConversionFair pricing
We are thrilled with our new ADU. It adds so much value to our property and the rental income is great.
Prefab ADUWonderful team
They helped us design an ADU that perfectly matches our main house. The neighbors love it too!
Backyard CottageSign in to leave a review for Hammer & Hand. Your feedback helps other homeowners make informed decisions.
Sign In to Write a ReviewProfessional-grade power tools and equipment for ADU construction. Industry-leading cordless tool systems.
Factory-built ADUs delivered to your site. Modern designs from 400–1,200 sq ft. Turnkey installation included.
Browse thousands of ADU and guest house plans. Filter by size, style, and budget. Plans start at $500.