“As of November 9, 2021, all housing cost increase notices must provide a minimum of 180 days' advance written notice.”

My old building gave everyone a 1 month notice of a 40% rent increase ON November 9, 2021. I called the city, a lawyer, and the news. When that wasn’t going anywhere, I made and taped signs all over the building with a snapshot of this very webpage. A week later the in the hallway, I saw the property manager had taped another letter on everyone’s door stating our rent wouldn’t be increasing. Felt like a massive victory. I had the advantage of anonymity and hope you do too. Best of luck to you and keep us updated.

https://www.seattle.gov/rentinginseattle/housing-providers/managing-the-rental-relationship/housing-cost-increases