Regarding Washington State notice requirements, are subcontractors required to send a notice to the property owner or prime contractor if they are contracted directly with the prime contractor? Is there a difference for material suppliers if providing material to a prime contractor? This question was raised after reviewing RCW 60.04.031 (2)(c) and RCW 60.04.031 (3)(b). It looks like section (3)(b) is only related to owner-occupied single-family properties. Our practice has been to send notices to all parties that have not contracted directly with our company.