Allows substantial amendments to the codes to be adopted no more frequently than every six years after the adoption and implementation of the 2016 codes referenced in RCW 19.27.031.

Authorizes the state building code council to enact emergency statewide amendments to the state building codes if an amendment is needed: (1) To address a critical life and safety need;

(2) To address a specific new or amended statute;

(3) For consistency with state or federal regulations; or

(4) To correct errors or omissions.

Requires the department of enterprise services, with the advice and input from the members of the state building code council, to employ permanent and temporary staff and contract for services for the state building code council.

Changes the composition of the state building code council.