Capital.com – Sofia Office by Helen Koss Interiors

Helen Koss Interiors is an interior design studio known for creating refined, highly personalized spaces across residential and commercial sectors. Founded in 2017 and based in Sofia, Bulgaria, the studio approaches each project as a unique narrative, carefully aligning design with the client’s lifestyle, brand identity, and functional requirements. With a portfolio spanning Bulgaria, the UK, Turkey, and abroad, the company demonstrates a consistent ability to deliver thoughtful, tailored interiors that balance elegance with purpose.  

Recognized for Best Luxury Office Interior Design for Capital.com – Sofia Office in Bulgaria, Helen Koss Interiors exemplifies a design philosophy rooted in collaboration and attention to detail. Originally founded by Helen Koss in Tel Aviv in 2009 and later established in Sofia, the studio is celebrated for its creativity, professionalism, and a distinctive approach that redefines traditional design boundaries. 

Rather than applying a predefined style, the studio develops bespoke concepts through in-depth consultation, ensuring each space reflects its user while maintaining clarity, cohesion, and long-term relevance. The Capital.com Sofia project highlights this expertise, combining brand-driven spatial planning with flexible work areas, bespoke joinery, and carefully curated materiality to support productivity and user experience. 

Sustainability and efficiency are integral to the studio’s process. Emphasis is placed on durable materials, energy-efficient solutions, space optimization, and responsible sourcing, ensuring each project is both environmentally conscious and financially viable. 

With expertise in interior architecture, design, and project management, and inspiration drawn from fashion, art, and global culture, Helen Koss Interiors delivers spaces that are functional, enduring, and aligned with each client’s vision.