We are a full-service real estate investment company specializing in strategically located apartment complexes and shopping centers.

Explore our collection of exceptional properties. Whether you’re looking for your next home or an investment opportunity, we have a diverse range of options to meet your needs.

From Start to Finish

We fuel growth by acquiring properties and seizing development opportunities in thriving US markets. With an analytical and disciplined approach, we maximize returns through our detailed investment evaluation. From land acquisition through construction, to expert management, we handle every aspect of development.


We manage every detail. From meticulous design and construction to maintaining equity in each property, we prioritize unwavering quality. Our focus on craftsmanship sets us apart from the competition. With a personal management presence at each of our properties, we guarantee long-term success and profitability.

Reputation Building

Our reputation is paramount. As the founder and owner of the properties we manage, we are committed to proactive and diligent management. Our intense focus on investment details ensures unparalleled service and quality, earning the trust of our investors, tenants, and the communities we operate in.

Mark S. De Mattheis


Principal and Founder of De Mattheis Investments, LLC in 2006. Previously, the Managing Partner of a family commercial real estate management and investment business from 1990 thru 2006. Responsible for all facets of De Mattheis Investment’s growth, including acquisitions, development and management of commercial real estate, including apartment complexes and shopping centers.

Mr. De Mattheis holds a NJ Real Estate License and is a member of the Middlesex County Board of Realtors. He has served on numerous real estate related Boards over the past 30 years. He holds a BS in Mathematics and Computer Science from the University of North Carolina at Chapel Hill.