Keyser Construction is a Portland-area design-build remodeling contractor based in West Linn, Oregon. Owner Brandan Keyser supervises every project personally, and the same crew of five handles each job from demolition through final walkthrough. Services include kitchen remodeling, bathroom remodeling, home additions, basement finishing, ADU construction, and whole-home remodeling. Free written estimates. Oregon CCB #121142. Keyser Construction pulls all permits, handles inspections, and includes a written workmanship warranty in every contract.