Does washignton state have common law marriage?

Question

If so what are the requirements. (eg years together or tax returns etc) Please state the government reference weblink

I have read that very few states have common law marriage.

Answer 1

No, it does not have common law marriage.

It does recognize the doctrine of meretricious relationship (also known as the doctrine of committed intimate relationship), wherein if a couple were living together as if husband and wife and they acquire assets together, then their assets can be considered as jointly held and in the case of a split or a death, the assets would be property owned by both.

It has nothing to do with other rights such as tax breaks, health insurance, etc.  It merely has to do with property.