Detached Accessory Dwelling Units
A standalone home for the rest of your life.
The scope, plainly.
A DADU — detached accessory dwelling unit — is a freestanding second home on your property. Unlike an attached ADU, it sits apart from the main house with its own foundation, roofline, and outdoor approach. That separation is what makes them so versatile: privacy for an aging parent, real rental potential, a dedicated studio, or simply more livable space for a growing family. We build single-story and two-story DADUs from the dirt up, working within Seattle's pre-approved DADU plan program when it makes sense and going fully custom when it doesn't. Our crews handle excavation, foundation, framing, MEP, exterior, and a finish package selected to either complement or intentionally contrast your main house.
- ✦Custom and pre-approved DADU plans
- ✦Single-story and two-story configurations
- ✦Up to 1,000 sq ft + 15-ft height bonus under HB 1337
- ✦Coordination with civil, structural, and energy consultants
Four phases, one crew.
- № 01
Site study
Topography, setbacks, tree retention, utility tie-ins, and an honest read on access for crews and equipment.
- № 02
Design + engineering
Architectural plans, structural calcs, and an energy compliance path appropriate for the climate zone.
- № 03
Permit
Full permit submission through SDCI or your county, including SEPA when required.
- № 04
Construction
Excavation through final inspection, with a fixed schedule and weekly owner meetings.
Other work we do.
Accessory Dwelling Units
Self-contained living spaces — kitchen, bath, and private entrance — added to your existing home or basement.
New Construction
Custom single-family homes built on infill lots and rural parcels across the greater Seattle area.
Additions & Add-Ons
Pop-tops, room additions, bump-outs, and second-story additions that match the home you already have.
Ready to talk about dadus?
A site walk is the fastest way to find out if we're a fit. Free, no obligation, usually within the week.