Washington's new laws let most lots add a second dwelling (a DADU). Answer a few quick questions and get an instant 5-point read on your lot — Green, Yellow, or Red across the things that actually make or break a project. Free, no obligation.
Where's the lot?
Your address powers the zoning, land, and utility checks.
Serving King & Pierce County and the greater Puget Sound.
Two quick ones
These decide the two things law can't tell us from an address alone.
The budget picture
A realistic WA backyard home runs $200k–$600k depending on your market. Rough is fine — we're only sizing feasibility.
Preliminary verdict
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Good to go Worth a closer look Likely blocker
Want the full picture?
A builder can turn this preliminary screen into a real answer for your exact lot — the specifics behind every yellow and red, plus a firm cost range.
This is a screening-level, self-reported estimate — not a permit determination. It's based on your answers plus general Washington and King/Pierce County law; it does not yet pull your parcel's official zoning, lot geometry, critical-area overlays, sewer/septic service records, or recorded covenants. Feasibility is not approval — final buildability is subject to city review and permits. A full report or a consultation confirms every item against real parcel data.