Our Specialties

KO Construction is Portland Oregon family owned and operated with over 50 years of collective experience in the market. We are licensed and insured general contractors, siding contractors, waterproofing contractors, and window installers in the state of Oregon and SW Washington. One of our quality signatures is our work on exteriors. We use high quality materials like Fortifiber and Tyvek building wrap products; James Hardie and Cemplank fiber cement siding and Soffit; all products are installed per manufacturer recommendations and inspected by a product representative to ensure quality and validate the product warranty. Our personnel is trained to ensure the quality of our work.

Quality isn't a goal—it's our lifestyle.

More than a goal, quality is our way of life. It's a value we embed deeply in every aspect of our operations. From the initial blueprint to the final nail, our commitment to exceptional quality drives our decisions and fuels our passion. This isn't just about meeting standards; it's about defining our identity as a company that lives and breathes top-notch quality in all that we do.

Passion for perfection

Our company is dedicated to delivering unparalleled craftsmanship, impeccable attention to detail, and uncompromising quality in every project we undertake. With a relentless commitment to excellence, we strive to transform visions into reality, ensuring that each structure we build stands as a testament to our unwavering pursuit of perfection."

KO CONSTRUCTION LLC

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