SBCC committee issues interpretation: ADU/duplex cannot egress through another unit; protected shared egress allowed under specified conditions

Feb 13, 2026

The BFRW approved a committee interpretation finding that an ADU or duplex unit may not legally egress through another dwelling unit, but a shared protected egress area is permissible for two‑family dwellings if it meets Washington amendments (R302.3/302.35) and opening‑protective requirements.

The full story

The BFRW voted Feb. 13 to approve a draft opinion answering whether an accessory dwelling unit (ADU) or duplex may egress through another unit and whether attached dwelling units may use a shared egress area.

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