Wash. Admin. Code § 458-61A-305
(3) The trade-in credit is allowed toward the later sale of the residence "brought in" on trade, not toward the tax liability of the sale of the residence for which it was traded. The affidavit upon which the trade-in credit is claimed must show all of the following:
(c) The disclosure that both properties involved in the original trade-in transaction are single-family dwellings.
For example, Bob is selling real property in Sun City. Alex wants to buy Bob's property, but he needs to sell his property in Smokey Hollow. Both the Sun City property and the Smokey Hollow property are single-family residential properties. Bob agrees to buy Alex's Smokey Hollow property for $175,500 and Alex agrees to buy Bob's Sun City property for $210,000. Real estate excise tax is paid on the full sales price of both properties. Three months later, Bob sells the Smokey Hollow property to Sally for $180,000. Bob receives a credit on the sale to Sally for the tax paid on the previous sale of the Smokey Hollow property.
[Statutory Authority: RCW 82.32.300, 82.01.060(2), and 82.45.150. WSR 05-23-093, § 458-61A-305, filed 11/16/05, effective 12/17/05.]