The Kalman Co. is a Nantucket real estate advisory serving buyers and sellers across the island. Led by Sean Kalman, a sixth-generation Nantucketer who was born and raised on the island, the firm combines local knowledge and relationships with transparent market data and concierge-level guidance. Its property search includes houses, condominiums, and land, with options across a range of prices, as well as access to select off-market opportunities.

The company supports clients throughout the buying and selling process, from property searches and evidence-based pricing to negotiations and closing. Its services include remote buyer representation, home valuation guidance, luxury real estate advisory, and help navigating Nantucket-specific considerations such as historic district requirements, septic systems, flood zones, and the Land Bank fee. The Kalman Co. also publishes quarterly market reports using LINK MLS data and offers guides to the island’s 32 districts, comparing neighborhood character, drive times, and price dynamics. For buyers and sellers seeking informed decisions, the firm offers a locally grounded perspective on Nantucket’s distinctive property market.