Full-service interior design firm for residential and commercial accounts. Providing quality service in Montana and beyond for over 45 years. By Design Interiors, Inc. and their talented design staff bring a new perspective to both interior and exterior spaces. We are involved in shaping interior spaces, considering everything from the electrical systems and framing to ceiling plans, finish work, and selection and placement of furniture. Our interior designers’ extensive knowledge of the latest fabrics and materials ensures style, endurance, and perpetual delight.