Why a backyard cottage is the strongest ADU investment
A detached ADU is a second legal home on your lot: its own entrance, kitchen, bath, and address, with nothing shared but the parcel. That independence is why DADUs out-earn attached units as rentals, why they carry the highest appraised-value increase of the three ADU types, and why they are the most popular ADU we build across King and Pierce County. Under Washington's HB 1337, every single-family lot has the right to two ADUs — a DADU can stand alone or pair with a basement suite.
Custom design or pre-approved plans
There are two routes to a permitted DADU. A custom design gives you a cottage shaped around your lot, trees, and light — our architects handle it end to end. Pre-approved plan sets (like Seattle's ADUniverse program) trade some flexibility for a meaningfully faster permit review. We build both; feasibility tells you which fits your parcel and timeline.
Not sure whether your parcel supports a backyard cottage at all? Read will your lot qualify for a DADU for the five site factors — size, setbacks, slope, sewer, and access — we check before quoting.
One fixed price, permit to keys
The quote covers the whole project: architectural drawings, engineering stamps, site survey and soil testing, every permit application and city fee, foundation through roofing, full MEP, interior finishes, landscaping restoration, and the final inspection with certificate of occupancy. The number on page one is the number at closeout.