About Kos Cleaning Services
Kos Cleaning Services was built on a simple principle: deliver high-quality exterior maintenance with integrity, clear communication, and attention to detail. We proudly serve homeowners and multi-unit properties throughout Washington, specializing in detailed window cleaning, full-service gutter care, roof treatment and moss control, professional pressure washing, and seasonal lighting installations. Our goal isn’t just to clean properties — it’s to maintain and protect them. We believe in long-term relationships, consistent results, and treating every home as if it were our own.
Fully insured. Detail-focused. Built on trust.
We don’t cut corners — we clean them.