K-Four Construction Corp. | 367 followers on LinkedIn. "We Do The Right Thing" | K-Four Construction Corp. "Where Precision Meets Excellence in Commercial Interiors" At K-Four Construction Corp., we bring over 40 years of expertise as a full-service general contractor, delivering high-quality interior fit-outs across the medical, educational, affordable housing, retail, and luxury living sectors. Proudly serving New York City, Westchester, Rockland County, New Jersey, Connecticut, and Florida, we are known for our hands-on approach, reliability, and results-driven execution