K&L Investments & management: Best Landscaping Serving Seattle, WA 98133
18841 Wallingford Ave N, Seattle, WA 98133
What the Company Handles
- Deck construction
- Building additions
Company Profile
Jason Cox, founder of K&L Investments & Management, brings over 15 years of hands-on construction experience to every project in Seattle. His journey started from a desire to build a more trustworthy and knowledgeable contracting business, leading him to pursue formal education in project management while earning key certifications, including PMP. This dual focus on field expertise and academic learning ensures a practical and well-managed approach. Jason is a local who understands the Pacific Northwest's specific challenges, from persistent dampness affecting homes to common landscaping needs. When he's not on a job site or studying, you might find him exploring the outdoors on his bike or working on a classic car, reflecting the same dedication he applies to building and improving Seattle homes.
Frequently Asked Questions
What is your process for building a deck that can handle Seattle's rainy climate?
We start by selecting materials proven to resist moisture and rot, like pressure-treated lumber or composite decking. Proper drainage and slope are critical, so we ensure water sheds away from your home's foundation. Our construction includes robust flashing and sealing techniques to protect the substructure. With Jason's background in waterproofing and hands-on field experience, we build decks that are not only beautiful but are designed to last through our wet seasons.
How do you manage a home addition project from start to finish?
My project management certification and field experience allow me to oversee every detail. We begin with a clear plan and timeline, handle all necessary permits for Seattle, and maintain consistent communication. I'm on-site regularly because I believe being hands-on is key to catching issues early and ensuring quality. This approach keeps the project efficient, minimizes surprises, and delivers a seamless addition that integrates perfectly with your existing home.
My yard has drainage problems and weeds are taking over. Can you help?
Absolutely. Many Seattle homes face these issues due to our climate. We assess your property's grading and drainage first, often improving soil composition and installing French drains or dry wells if needed. For weeds, we don't just remove them; we address the root cause by recommending and installing proper ground cover or mulch that suppresses future growth. Our landscaping solutions are designed to create a healthier, more manageable outdoor space.

















