Thomas Mammarella

Director
Thomas Mammarella

THOMAS MAMMARELLA is a widely respected and experienced attorney with a focus on commercial and residential real estate law. He has a reputation for meticulous handling of transactions and is highly responsive, and focused on service, to his clients, who include businesses, landlords, developers, investors, and individuals. Over the course of his distinguished career, he has advised on real estate transactions involving development projects and the purchase, lease and sale of retail, industrial, and office properties.

For over forty years, individuals, families, and businesses have benefited from Thomas’ extensive experience in Delaware real estate law. He has helped clients to protect their interests and achieve their goals in commercial and residential real estate matters, including land development and land use approvals, formation of condominiums and tax assessment appeals.  He also provides tax advice on like-kind exchanges and structuring transactions in ways to reduce income taxes by maximizing long term capital gain treatment.

Thomas’ influence extends beyond individual projects. He actively participates in shaping Delaware’s legal landscape, staying abreast of the latest developments and sharing insights within the legal community.  For more than two decades, he was an instructor of real and personal property law for the Widener Delaware Bar Review Program. His in-depth understanding of real estate law positions him as a trusted advisor to clients and colleagues, sought after for his guidance and respected for his unwavering commitment to excellence.

Areas of Practice

Admissions

Education

Honors & Awards

Professional Associations

Recent News

  • 08.21.25

Gordon, Fournaris & Mammarella, P.A. is proud to announce that three of the firm’s directors have been included in the 2026 Edition of The Best Lawyers in America®.  The attorneys are each recognized for their excellence in specific practice areas: Peter S. Gordon (Litigation-Trusts and READ MORE

  • 11.01.24

On November 1, 1994, Peter Gordon, Thomas Mammarella, and Emmanuel Fournaris founded Gordon, Fournaris & Mammarella, PA. While working together at another firm, Peter, Tom and Manny decided to take a leap of faith and set out on their own to create a law firm specializing in estate READ MORE

GF&M is 30!
  • 08.15.24

GORDON, FOURNARIS & MAMMARELLA, P.A. is proud to say five of the firm’s directors have been recognized for their excellence in legal practice in the 2025 Edition of The Best Lawyers in America®. Peter S. Gordon – Litigation - Trusts and Estates, Tax Law, and Trusts and Estates READ MORE

The Best Lawyers in America logo
© 2026 Gordon, Fournaris & Mammarella, P.A. Disclaimer Sitemap
Site by LISI