Meet Sean Kalman: Your Trusted Nantucket Realtor™
Nantucket Realtor™
With a passion for real estate spanning over three decades, I transitioned into the industry in 2013 after dedicating 14 years to being a stay-at-home mom. My journey began with the development of two subdivisions in Amherst and Chester, NH, culminating in the successful creation of the Village at Oakwood, a vibrant 55+ community in Derry, NH, which we proudly launched in 2019. Seeing the 30 single ranch-style homes at our Derry development sold out within two years was immensely rewarding, setting the stage for our next venture, Colby Farms, where we are now building single-family homes in Chester, NH. My husband and I are now proud to say we live in the town of Derry in one of the condos we built!
A sixth-generation Nantucket native with deep roots in the island’s community, Sean Kalman blends entrepreneurial drive, design sensibility, and years of hands-on service experience into a distinctly elevated real estate practice. Before founding The Kalman Co., Sean built and led high-performing hospitality ventures, where he developed an instinct for presentation, negotiation, and creating seamless client experiences. That foundation now defines his approach to real estate: thoughtful, detail-driven, and relentlessly client-focused.
Sean launched The Kalman Co. with a clear vision—to deliver a concierge-level experience for buyers, sellers, and investors navigating the Nantucket market. He understands that purchasing property on the island is rarely just a transaction. It is emotional. It is generational. It is often a once-in-a-lifetime move. With intimate knowledge of Nantucket’s neighborhoods, zoning regulations, permitting nuances, and shifting market dynamics, Sean helps clients make informed, strategic decisions that protect long-term value while aligning with their lifestyle goals.
His background in hospitality gives him a unique advantage. He anticipates needs before they arise, communicates clearly, and guides clients through complex processes with calm confidence. Whether advising on a legacy waterfront estate, a hidden in-town gem, or a smart investment opportunity, Sean combines local insight with modern marketing, data analysis, and forward-thinking strategy.
Beyond the business, Sean remains deeply connected to the island community that shaped him. He is passionate about preserving Nantucket’s character while embracing its evolution. Outside of work, you will find him exploring quiet stretches of beach, supporting local initiatives, collaborating with fellow entrepreneurs, or sharing insider knowledge with both newcomers and lifelong residents.
For Sean, real estate is not simply about buying or selling property. It is about helping people step fully into their next chapter—and living the Nantucket dream with confidence.