The current online code incorporates ordinances passed through 21 December 2012. The most recent codified ordinance is Ordinance 124092.

http://clerk.seattle.gov/~public/toc/table.htm

Ordinance	SMC sections affected
124072	Amended § 23.49.011, 23.49.013, 23.49.014, 23.49.181
124074	Amended § 21.04.440.E.2
124076	Amended §§ 21.36.089, 21.36.922.B
124082	Amended § 4.36.230.A
124089	Amended §§ 5.40.025, 5.30.030.B.4, 5.30.035.E, J, 5.30.050.B, C, 5.45.081, 5.45.090.N, 5.45.100.G
124092	Amended § 4.13.010