
About Green Slate
Company Origins and Leadership
Green Slate is a family-owned landscape construction group that has proudly served northwestern Washington for over thirty years. Sean Friesen, who began his journey on the lawn-mowing crew, has since ascended to company ownership and operation alongside his wife, Aubree. Their combined dedication and passion drive Green Slate's commitment to excellence.
Our Guiding Mission
Our mission is to provide quality landscape construction services, collaborating closely with clients and landscape architects throughout the entire project lifecycle. We build lasting relationships based on trust and satisfaction, offering expertise in residential and commercial landscape solutions that positively impact the community and environment.
Pioneering the Future
Looking ahead, we strive to lead the landscaping industry, providing impactful solutions for clients. Our strength lies in handling complexity and delivering innovation within tight timelines and challenging scenarios. Client satisfaction and transformative outdoor spaces drive Green Slate. We value our strong references and reputation, built on shared successes with our clients.

Let’s collaborate.
Connect with us to witness our dedication in motion. Let's collaborate to transform your outdoor dreams into reality, nurturing an enduring relationship.