In the heart of Spain’s radiant Costa del Sol, Agnes Inversiones S.L. stands as a pillar of trust, excellence, and dedication. Being among the Top 100 Real Estate Brokers of the World for 2025, recognized by Luxury Lifestyle Awards. this company is not only the oldest and largest real estate agency with Polish roots in the region, but also a symbol of how passion and professionalism can turn a vision into an enduring success story.

Guidance & Purpose

From its beginnings, Agnes Inversiones has had one clear mission: to find the places where clients’ dreams come true. The company provides a comprehensive, client-focused service, guiding buyers from property selection to key handover, and even beyond through renovation support and long-term management.

Every offer is tailored to individual expectations and financial goals, ensuring clients feel supported at every stage. Backed by in-depth market knowledge, a deep understanding of Spanish property law, and an expert grasp of local topography, the team offers unmatched insight into the Costa del Sol’s most desirable locations.

A Diverse Portfolio

With an extensive portfolio of exclusive listings, Agnes Inversiones offers clients a wide range of properties across the Costa del Sol, from Sotogrande to Malaga with the main focus on Marbella. Each client is guided by a dedicated consultant to find the perfect offer, whether for investment or lifestyle. Through its inspiring blog, Discover Spain with Us, the company also shares insights into local culture, living, and the art of making the Costa del Sol home.

The Visionary Behind the Brand

At the heart of this success stands Agnes Marciniak-Kostrzewa, Founder and CEO of Agnes Inversiones. Born in Poznań, Poland, she represents the fourth generation of entrepreneurial women in her family. A graduate in Tourism from the University of Poznań, she moved to Marbella in 1995, drawn by its beauty and potential. The company is also a member of the Leading Property Agents of Spain (LPA).

Her professional journey began in tourism property sales before shifting permanently to real estate in 2002. In 2006, she launched her own agency, initially a one-woman venture, now a thriving business collaborating with partners across Europe. Agnes is a member of ASAPI Málaga and a respected market commentator in Polish, Spanish, European and US-American media. Her leadership combines precision, empathy, and vision, qualities that have made her one of the region’s most trusted real estate experts.

A Synonym for Excellence

As Agnes Inversiones continues to grow, its mission remains unwavering: to connect people with places that inspire, comfort, and empower them. With its blend of experience, innovation, and heartfelt dedication, the company has become synonymous with excellence on the Costa del Sol.

Through the leadership of Agnes Marciniak-Kostrzewa, the agency exemplifies how a clear vision, guided by integrity and human connection, can turn real estate into something far greater than property; it becomes the art of finding a home.

Discover Luxury Living in Marbella and Beyond:  https://en.agnesinversiones.com/.