Koral Bros. Inc.

Founded in 1920, Koral Bros. is a Southampton-based builder with more than a century of experience crafting exceptional residential architecture on the East End. Established by William Koral, the firm has evolved across generations while remaining grounded in a single principle: building well is both a discipline and an art.

We collaborate closely with architects and designers to execute custom new construction and thoughtful renovations, bringing rigor, clarity, and care to every phase of the process. Our work is informed by intelligent building practices, deep technical expertise, and a deep respect for design intent—ensuring that complex ideas are realized faithfully and beautifully.

Koral Bros. maintains long-term relationships with our clients beyond completion, providing ongoing stewardship and post-construction support as homes age, adapt, and are passed down through generations.

“The Architects’ Builder”

Architects and designers rely on Koral Bros. to translate vision into built form with precision and discretion. Known as The Architects’ Builder, we are trusted for our ability to navigate complexity, solve problems creatively, and uphold the highest standards of craftsmanship—earning the confidence of the architectural community through our work.

For more than four generations, Koral Bros. has built its reputation on integrity, mastery, and an enduring respect for architecture.