About John G. Slattery

Meet John.

John G. Slattery is a New York City real estate agent with Corcoran, working with buyers and sellers across the Upper East Side. His approach is client-centric: listen carefully, explain the process plainly, and stay responsive from the first conversation through closing. Before real estate, John spent 35 years in fashion after studying at Parsons School of Design in 1989. That experience informs how he evaluates a home’s light, proportions, condition, and presentation—and how he helps a seller put a property’s best qualities forward. John’s professional profile lists both buyer’s-agent and listing-agent experience. His client reviews describe work with first-time buyers and co-op purchasers, including help with board applications, negotiations, and the details that follow a signed contract. The represented sales recorded in this site’s portfolio total more than $31.7 million across 34 transactions from 2021 through 2026. John contributes a portion of every transaction to Corcoran Cares.