WAC 51-50-0506
Area modifications.
506.1.1 Basements. Basements below the first story above
grade plane need not be included in the total allowable area
provided each such basement does not exceed the area permitted
for a building with no more than one story above grade plane.
[Statutory Authority: RCW 19.27.074, 19.27.020, and chapters 70.92, 19.27, and 34.05 RCW. 07-01-091, § 51-50-0506, filed
12/19/06, effective 7/1/07.]