Re: Washer Drain Pipe Overflow
It would seem since this is a recent issue it's sounds likely there is a blockage in the drain.
You might purchase a snake at least 25 feet long and try to free the blockage yourself.
If you feel the blockage is downstream from the kitchen sink then you might be able to remove the "P" trap and start snakeing from that point to the main stack. Or there may be a clean out access cover which you would insert the snake.
You could get up on the roof and with a flash light look down the main vent for that area to see if there's anything in the pipe .... however this won't allow you to check a vent pipe that may branch off.
"" an ounce of perception -- a pound of obscure "