My question involves real estate located in the State of: Washington
Purchased house "B" with weedy front yard and weedy fenced in side yard. By all appearances the weeds belonged with the house as there was a clear maintenance line with the next door house "A". Fence was erected by prior owner of "B" along the maintenance line in 2005/06. Google maps in 1998 shows same unfenced line of maintenance. Apparently most of the yard belongs to house "A". "A" claims to have known about it after his purchase 8 months ago and before our purchase 2 months ago because another potential buyer of house "B" had a survey done and discovered the problem and somehow he found out from that. He did nothing to inform the realtor of house B nor did he start to maintain the property in question or tear down the fence upon discovering that it is his. It seems prior to these recent purchases, owners of both houses maintained the property line at this point with no encroachment filed. Can this be construed as adverse possession thru various owners, given the google map image from 1998 showing the same line?
House A is two lots with combined size more than twice B's lot, yet B's lot is valued at 65% of A's 2 lots, almost like the assessors have been considering the maintenance line to be the property line for years also (may be hard to prove). Legal descriptions are given only in lot#x, no measurements are attributed to the lots on the city plat. The houses were built around 1900.

