ADU & DADU in Seattle

[Darren Chang]

Hi everyone, has anyone recently taken advantage of the new ADU/DADU regulation in Seattle? Any reflection/thoughts on it? Thanks in advance for any feedback.

[Michael Haas]

@Brian Hughes my understanding is that the rules for adding a unit to small multifamily are completely different from SF zoning ADU and DADU permitting. For true ADU's (which can be rented separately without owner occupancy) the big changes tend to be electrical (it needs its own sub-panel), plumbing (it needs it's own hot water heater), egress (5.7 sq ft opening required in all bedrooms), HVAC (needs independantly controlled heat). Most permitted Mother-In-Laws (and almost all non-permitted units) share power, hot water tanks, and HVAC with the main house.