New construction of one detached structure containing two accessory dwelling units (shared-wall DADU pair, side-by-side, mirrored), accessory to the existing single-family dwelling which remains (Bonus 1 allowing 35' building height). 999 SF living area per unit (1,998 SF total), each unit with attached 2-car garage and mechanical room (410 SF + 70 SF per unit), 3 levels, garages accessed from alley. All-electric: ductless mini-split heat pumps and Tier III heat pump water heaters, no gas. Removal of existing detached garage. Two new 4" sanitary services combining to one 6" service connecting to existing 6" side sewer; two new water meters from 8" main. Stamped structural engineering (Routley Engineering #2026.104) and stamped roof truss engineering (MiTek/Parr) included with application — no deferred submittals. WSEC compliance via WSU calculator, 7.5 credits provided vs. 5.0 required.
Submitted Sep 04, 2026
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