Prolific DBR(425) 800-4775
Build/Additions & ADUs

Additions & ADUs.

Permitted additions, ADUs, accessory dwelling units.

King County loves ADUs. We handle design through final inspection — permit application, foundation, framing, MEP, finish.

Start your additions & adus intake.

Tell us a bit about your project and when you're free. We'll set up a 30-minute call.

No spam. No salesperson.

What you get. Always.

Every additions & adus project. Written into the scope.

Design + permit-ready drawings
Site survey + foundation engineering
MEP coordination
Inspection scheduling
Final occupancy certificate
500+
Washington homeowners
5.0
Aggregate rating
24/7
Emergency response
2020
Founded in King County
Live feed

Recent additions & adus work.

Live pipeline syncing. Check /work for the full project archive.

Additions & ADUs in 12 King County cities.

Same crew. Same scope discipline. Same warranty.

Ready to lock additions & adus?

★ 5.0 · 500+ Washington homeowners