Average Rent In King County 2025. Residential rents could go up as much as 4% and office space vacancy may continue to rise in the seattle area, according to local real estate experts who were asked for their 2025 predictions. This information is a snapshot in time, subject to change, and is intended to provide unofficial candidate filing statistics.
Airbnb cash on cash return: Still, the average rent in king county was $2,432 each month.