Testimonials

"John did an outstanding job for us. He had abundant local knowledge, enthusiasm, and an understanding of my family's attachment to the prooerty. He only involved us when necessary, but often asked what he could do to make the process easier for us. All our questions were answered promptly in a reassuring manner. Our property was listed in March,..."

"John did an outstanding job for us. He had abundant local knowledge, enthusiasm, and an understanding of my family's attachment to the prooerty. He only involved us when necessary, but often asked what he could do to make the process easier for us. All our questions were answered promptly in a reassuring manner. Our property was listed in March, and we closed on May 20. My trust in John was well founded. Many thanks to him and his team."

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— Westa Hopkins, Seller

"We can’t say enough great things about working with John and Cassie. From the very beginning—when John helped us purchase our home in East Hampton—to now, when they both guided us through selling it, they have been nothing short of exceptional. John and Cassie worked diligently and attentively every step of the way. Their professionalism, knowle..."

"We can’t say enough great things about working with John and Cassie. From the very beginning—when John helped us purchase our home in East Hampton—to now, when they both guided us through selling it, they have been nothing short of exceptional. John and Cassie worked diligently and attentively every step of the way. Their professionalism, knowledge, and responsiveness made the entire process smooth and stress-free. We never had to worry whether we were in good hands. They consistently went above and beyond to ensure everything was handled with care and precision. One of their greatest strengths is their ability to move quickly and efficiently. John and Cassie worked diligently and attentively to prepare, list, and market our home. Once we had an offer, they kept everything on track and helped bring us to closing in a remarkably short period of time. Their sense of urgency never came at the expense of quality, every detail was handled thoughtfully and thoroughly. Communication was also seamless; they kept us informed and involved, while also taking the pressure off when it came to the details. We’re incredibly grateful for all they’ve done for us!"

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— Laura & Travis Rathbone, Buyer & Seller

"We lucked out finding John. My wife and I had been searching in the Hamptons for years and he stuck with us, sending new and interesting places that came onto the market, and always being there to show us them when we could make it out from the City. He has great insights regarding each place we viewed, pros and cons, and we weighed them togethe..."

"We lucked out finding John. My wife and I had been searching in the Hamptons for years and he stuck with us, sending new and interesting places that came onto the market, and always being there to show us them when we could make it out from the City. He has great insights regarding each place we viewed, pros and cons, and we weighed them together. He also has great recommendations for people to use after purchase to get your home up and running. In addition to being a great real estate professional, he's a great person as well. We're happy to call him a friend. Thanks for helping us find our dream Hamptons getaway John."

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— Benjiman G, Buyer

"John is a straight up decent guy with no hidden agenda and no smarmy, pushy sales pitch. He doesn’t even come across as a realtor, he is so excellently low key. We bought our home in East Hampton and John, who grew up out there, really really knows the area and the market there. We spent a few months looking for a house with him and John was qui..."

"John is a straight up decent guy with no hidden agenda and no smarmy, pushy sales pitch. He doesn’t even come across as a realtor, he is so excellently low key. We bought our home in East Hampton and John, who grew up out there, really really knows the area and the market there. We spent a few months looking for a house with him and John was quick to point out what he saw as potential downsides to properties other realtors may have omitted to make a sale. Things we would have never known, like how a particular street was a busy bypass route in the summer. His insight was invaluable. He eventually found us the perfect house, we were the first people to see it. John had an inside line on it because, like I said, he knows what’s what. I highly recommend."

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— Stu Kollomorgen, Buyer

"John and Cassie are wonderful. We had worked with them when we bought the home and were extremely satisfied, so choosing them again was a no-brainer. For the sale, they did an excellent job in the months leading up to us listing to help us think about how the market typically works. The dynamics in the second half of 2025 were the inverse of wha..."

"John and Cassie are wonderful. We had worked with them when we bought the home and were extremely satisfied, so choosing them again was a no-brainer. For the sale, they did an excellent job in the months leading up to us listing to help us think about how the market typically works. The dynamics in the second half of 2025 were the inverse of what is frequently seen (slower in the usually busy season, hotter in the usual slower season) and throughout they gave us real-time guidance on what they were seeing and how we should think about pricing. There are a lot of nuances when it comes to selling homes in this particular market—John was always ahead of these things given he is a true local, informing us of actions we needed to take to ensure the process was as hassle-free as possible. In addition, since we did not live there full-time, he was more than happy to stop by the property as needed to support us. We highly recommend John and Cassie to anyone buying or selling in the area."

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— Eduardo Royes, Buyer & Seller

"We met John and Cassie years ago at an open house, long before we were ready to buy. They stayed in touch with genuine warmth and zero pressure, and when the day finally came for us to step into the market as first-time homebuyers, there was no question who we wanted guiding us. It ended up being one of the best decisions we’ve ever made. Workin..."

"We met John and Cassie years ago at an open house, long before we were ready to buy. They stayed in touch with genuine warmth and zero pressure, and when the day finally came for us to step into the market as first-time homebuyers, there was no question who we wanted guiding us. It ended up being one of the best decisions we’ve ever made. Working with John and Cassie — and the entire Hamptons Collaborative team — was an incredible experience from start to finish. They struck the perfect balance of expertise, strategy, and humanity. They made a process that should have been overwhelming feel manageable, even exciting. Their knowledge of the Hamptons market is unmatched, and their ability to anticipate challenges before they surfaced gave us complete confidence every step of the way. What made the biggest impact was how deeply they cared about getting this right for us. They listened. They advocated. They explained everything with patience and clarity. It never felt transactional. It felt like having two trusted partners who were fully invested in helping us find a home that fit us, our lives, and our goals. Today, we’re in a home we absolutely love — a home that still takes our breath away — and we owe that entirely to their guidance and commitment. For anyone considering buying or selling in the Hamptons, there’s the industry…and then there’s John, Cassie, and the Hamptons Collaborative team. They are truly exceptional. — Chris & Kelly"

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— Christopher Bruno, Buyer

"From the minute we started working with John and Cassandra, they have been true professionals in every sense of the word. They are knowledgable of the area and able to offer multiple options that suit their buyers' needs. John and Cassandra's level of communication is exceptional not something you'd find in all agents. As a buyer, I did not feel..."

"From the minute we started working with John and Cassandra, they have been true professionals in every sense of the word. They are knowledgable of the area and able to offer multiple options that suit their buyers' needs. John and Cassandra's level of communication is exceptional not something you'd find in all agents. As a buyer, I did not feel pressured or pushed into any decisions. The whole process was comfortable and easy from start to finish. I would whole-heartedly recommend John and Cassandra to anyone in need of real estate services on the East End."

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— Michael McCarthy, Buyer

"John was really great and helped us get our dream house in East Hampton. He grew up in the area and knows everybody in real estate and construction. On top of this, he knows a lot about homes and has a really sharp eye for important details. So he helped us through the whole process, including negotiating on our behalf, and has also become a tho..."

"John was really great and helped us get our dream house in East Hampton. He grew up in the area and knows everybody in real estate and construction. On top of this, he knows a lot about homes and has a really sharp eye for important details. So he helped us through the whole process, including negotiating on our behalf, and has also become a thought partner in some of the renovations and landscaping that we plan to do. Thank you John!"

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— Aaron Iba, Buyer

"Let me first say, that John and his wife Cassie have been friends of ours for years. After my husband and I had been looking for a house for a really (REALLY) long time with no success, we decided it was time to link up. Both Cassie and John have roots in the area, and their expertise was needed if we were ever going to secure a home in Montauk...."

"Let me first say, that John and his wife Cassie have been friends of ours for years. After my husband and I had been looking for a house for a really (REALLY) long time with no success, we decided it was time to link up. Both Cassie and John have roots in the area, and their expertise was needed if we were ever going to secure a home in Montauk. Anyone whose ever home shopped out here knows how incredibly difficult it is. As first time home buyers, we were probably pretty needy. It's a really daunting and scary process, but neither John nor Cassie bat an eye about talking with us every single day, coaching and guiding us, putting our minds at ease, and making us aware of what was going on in the background. They went so far above and beyond to provide us the comfort that we were craving throughout, and their level of knowledge regarding the whole process, the ins and outs, the connections to other parties involved, helped to set our (my) anxious mind at ease each and every day. They even continued to help us tie up loose ends after we closed. I truly can't say enough good things about both John and Cassie, and together as a team you won't find better service in this industry. Sending the warmest thank you to our friends for making our biggest, greatest, most sought after dreams come true. You have changed our lives. <3"

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— Allie Morehouse

"Cassandra was incredibly knowledgeable and helpful throughout the entire purchasing process. She offered tremendous insight and guidance from everything down to selecting neighborhoods, expected time frame and the overall process, which we were very impressed with."

— Alexandra C, Buyer

"John did a truly exceptional job selling my home and was a pleasure to work with. He is professional, incredibly knowledgeable about the Hamptons and his expertise in the specifics of that market was instrumental in setting up a competitive purchasing price and interest even before the house went on the market. The entire process went very quick..."

"John did a truly exceptional job selling my home and was a pleasure to work with. He is professional, incredibly knowledgeable about the Hamptons and his expertise in the specifics of that market was instrumental in setting up a competitive purchasing price and interest even before the house went on the market. The entire process went very quickly and John was present in all aspects of the showing, contract negotiation and closing process. "

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— Jenn Joy, Seller

"Excellent experience with John and Cassie. We were looking to purchase a seasonal/weekend home and they were super helpful / patient throughout -- starting with a preliminary conversation when we were only contemplating the idea, all the way through to ironing out all final details with a tricky seller at closing. John is a true local, having gr..."

"Excellent experience with John and Cassie. We were looking to purchase a seasonal/weekend home and they were super helpful / patient throughout -- starting with a preliminary conversation when we were only contemplating the idea, all the way through to ironing out all final details with a tricky seller at closing. John is a true local, having grown up in the area, and he knows all of the nuances of the area (home types, most desirable neighborhoods/streets, etc) and of course vendors. Both John and Cassie struck the perfect balance in terms of offering opinion/advice-- when asked/pressed, they gave honest, good opinions, but never tried to steer us in any particular direction as we weighed the various options that come up at multiple points in the process. The listings they showed us were on point with what we were looking for, and we actually went with a home that showed up in the first set of listings they provided us. It was truly a professional experience."

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— Lauren MacIntosh, Buyer

"We feel so lucky to have had John and Cassie representing us as we searched for our new home. They have a deep knowledge of real estate and especially in the Hamptons, and that plus their expertise and judgement kept us from making mistakes. My husband was impressed with their knowledge of local ordinances and negotiating skills. We give them ou..."

"We feel so lucky to have had John and Cassie representing us as we searched for our new home. They have a deep knowledge of real estate and especially in the Hamptons, and that plus their expertise and judgement kept us from making mistakes. My husband was impressed with their knowledge of local ordinances and negotiating skills. We give them our highest recommendation."

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— Lisa Standiford, Buyer

"John and Cassie Esposito went above and beyond. They helped us find several properties that we liked and ultimately the one we loved and most importantly, navigated us through the process from beginning to end and even after we closed. We absolutely loved working with them and recommend them unconditionally."

— Karyn Grupski, Buyer

"John is a consummate professional and good person. He's a straight-shooter and knows his market extremely well. He got our deal done and followed-up beyond that. I fully recommend him."

— Alex Rossi, Buyer

"My experience with John in buying our home was amazing. John and his wife Cassie are well-experienced and super-knowledgeable in the Hampton market. They are well respected as being fair and honest and a good advocate for their clients. It took us 3 years to find our home and John was available and patient to indulge and support our process. Tru..."

"My experience with John in buying our home was amazing. John and his wife Cassie are well-experienced and super-knowledgeable in the Hampton market. They are well respected as being fair and honest and a good advocate for their clients. It took us 3 years to find our home and John was available and patient to indulge and support our process. Truthfully, we could not have done it without them."

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— Marc Zand, Buyer

"Working with John and Cassie made the sale process smooth from beginning to end. They are both very knowledgeable, engaging and overall just a pleasure to work with. They have a unique "east end insight" which was valuable to ensure we were making informed decisions along the way. I hope that we make it back to East Hampton and they will be our ..."

"Working with John and Cassie made the sale process smooth from beginning to end. They are both very knowledgeable, engaging and overall just a pleasure to work with. They have a unique "east end insight" which was valuable to ensure we were making informed decisions along the way. I hope that we make it back to East Hampton and they will be our first call."

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— Ryan Hunter, Seller

"We had a wonderful experience with John! Our house was not an easy one to sell but John was the perfect person for the task. He was professional, excellent negotiator, and we walked away beyond pleased. I highly recommend him."

— Erin G, Seller

"John and his team worked tirelessly with us. Although we have bought and sold several properties over the years, this situation, an estate sale, was unique for us. We had little knowledge of East Hampton or the real estate market there. They were able to refer us to numerous services to help out including handymen, landscapers, an auction compan..."

"John and his team worked tirelessly with us. Although we have bought and sold several properties over the years, this situation, an estate sale, was unique for us. We had little knowledge of East Hampton or the real estate market there. They were able to refer us to numerous services to help out including handymen, landscapers, an auction company to help dispose of possessions. They were extremely knowledgeable and guided us through the process to a successful sale."

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— Shari Aber, Seller

"John and Cassie were fantastic to work with. They were super organized, communicative and responsive. As locals, they really understood the market and directed us to a range of properties. In the end, we decided to pivot from purchasing a home to buying land and building, and they pivoted with us flawlessly. Lastly, we enjoyed working with them...."

"John and Cassie were fantastic to work with. They were super organized, communicative and responsive. As locals, they really understood the market and directed us to a range of properties. In the end, we decided to pivot from purchasing a home to buying land and building, and they pivoted with us flawlessly. Lastly, we enjoyed working with them. They are fun people and clearly love what they do. We highly recommend working with them!"

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— Lem Byers, Buyer

"John was an excellent help in finding my home. I am a first time home buyer and he walked me through the entire process in an attentive, honest, and punctual way. Worked well with my schedule and offered local recommends for services. Highly recommend!"

— Kevin Cremens, Buyer

"My wife and I have dealt with many real estate agents before and have had mediocre engagements at best. However, John went above and beyond for us. John was always proactive in bringing us opportunities and never shied away from giving us his perspective and thoughts. We had a true advocate that we felt were truly representing our interests desp..."

"My wife and I have dealt with many real estate agents before and have had mediocre engagements at best. However, John went above and beyond for us. John was always proactive in bringing us opportunities and never shied away from giving us his perspective and thoughts. We had a true advocate that we felt were truly representing our interests despite a very challenging market. John also introduced us to our great attorney (birds of a feather...). He was always available and very communicative but never wasted our time either. I definitely appreciated his no-nonsense approach and expertise in the market. If it comes time for our next purchase or the sale of our home, John's going to be our first call for sure."

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— Andrew Kao, Buyer

"Working with John was a pleasure from beginning to end. John is very knowledgeable about real estate, pricing trends and the area. John and Cassie work so well with us and kept us informed about every aspect of the marketing and Interest in our home. We highly recommend John Esposito to sell your home!!"

— Lenore Goedtel, Seller

"We just bought our second home in East Hampton and John was very helpful, knowledgeable and extremely responsive to all of our inquiries. He went above and beyond in helping us get all of our packages and furniture deliveries into the house as we live across the country and couldn’t be there for all of it. We were very extremely satisfied with C..."

"We just bought our second home in East Hampton and John was very helpful, knowledgeable and extremely responsive to all of our inquiries. He went above and beyond in helping us get all of our packages and furniture deliveries into the house as we live across the country and couldn’t be there for all of it. We were very extremely satisfied with Compass in all aspects of this transaction."

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— Joanna Mahoney, Buyer

"Had a great buying experience with John. He listened to us and actually showed us houses that met our criteria. I wish all realtors were like this. Process was so easy. He has great local knowledge, being from the area, and great consultant on houses, as his family does construction. Fantastic resource to have when you're buying."

— John Hinnegan, Buyer

"Cassie and John helped my husband and I purchase a home. Cassie went above and beyond, spending many weekends looking at homes with us and offering honest feedback and insightful observations. I've bought and sold real estate in New York, and found real estate agents pushy and stressful. Cassie was the opposite - it was a pleasure to work with h..."

"Cassie and John helped my husband and I purchase a home. Cassie went above and beyond, spending many weekends looking at homes with us and offering honest feedback and insightful observations. I've bought and sold real estate in New York, and found real estate agents pushy and stressful. Cassie was the opposite - it was a pleasure to work with her and we'd absolutely recommend her to anyone buying or selling in the Hamptons."

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— Elizabeth Friedman, Buyer

"I have worked with many real estate professionals out east and in NYC and John is a stand out He knows the market and his clients extremely well and has always presented well-qualified and wonderful tenants to rent my house. Working with John is seamless and easy with everyone on both sides satisfied. Once the transaction is completed, John is s..."

"I have worked with many real estate professionals out east and in NYC and John is a stand out He knows the market and his clients extremely well and has always presented well-qualified and wonderful tenants to rent my house. Working with John is seamless and easy with everyone on both sides satisfied. Once the transaction is completed, John is still very present. He has been available as a resource when needed. He has gone above and beyond to recommend reliable people at a moment’s notice. He is honest, trust worthy, dedicated and highly responsive. I would highly recommend him and his wife, Cassie, to anyone looking to buy or rent in the Hamptons."

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— Kimberley M, Landlord

"Working with John and Cassie Esposito was a pleasure. They were efficient, professional and personable too! They negotiated quickly and fairly with both us and our renters.If you are looking to buy, sell or rent in the Hamptons you should seek out this power couple. You won't be disappointed."

— Mari Barnett, Landlord

"John and Cassandra helped me line up renters for my house. They were very candid with e about what problems I might face and ways to come to an agreement with tenants to minimize risk. John was very helpful in negotiating rental prices and security/utility deposits with my tenants and our decisions resulted in a successful rental term. My house ..."

"John and Cassandra helped me line up renters for my house. They were very candid with e about what problems I might face and ways to come to an agreement with tenants to minimize risk. John was very helpful in negotiating rental prices and security/utility deposits with my tenants and our decisions resulted in a successful rental term. My house was taken care of and returned to me in great condition, and our tenants were very happy with their stay and understanding of all costs up front."

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— Kristin Senese, Landlord

"John is the exclusive broker we work with for renting our East Hampton home since fall 2020. Since day one of working together he has been prompt, diligent, and consistent in following up with prospective leads and soliciting interest in our property. Thank you to John and Cassie for always doing their utmost to get us great tenants, and for bei..."

"John is the exclusive broker we work with for renting our East Hampton home since fall 2020. Since day one of working together he has been prompt, diligent, and consistent in following up with prospective leads and soliciting interest in our property. Thank you to John and Cassie for always doing their utmost to get us great tenants, and for being a wonderful team to work with!"

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— Matthew Spelman, Landlord

"Cassandra and John together helped me sign with tenants for my rental. Their knowledge and experience with the nuances of being a landlord and coming to mutually protective arrangements with tenants were very helpful to me as a new landlord. Cassandra was very hands on and extremely responsive to my many questions throughout the lease signing pr..."

"Cassandra and John together helped me sign with tenants for my rental. Their knowledge and experience with the nuances of being a landlord and coming to mutually protective arrangements with tenants were very helpful to me as a new landlord. Cassandra was very hands on and extremely responsive to my many questions throughout the lease signing process. She was honest about any risks she perceived I might face and presented me with options to reduce all risk and keep my property safe during a great rental term."

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— Corey S, Landlord

"Working with John & team was such a pleasure; He was very knowledgeable about the market, which helped us in making the decision on when to rent our home. Since this was our first time renting, we had a ton of questions and were not super informed about the process, and he made us feel at ease & very comfortable. He made himself very available t..."

"Working with John & team was such a pleasure; He was very knowledgeable about the market, which helped us in making the decision on when to rent our home. Since this was our first time renting, we had a ton of questions and were not super informed about the process, and he made us feel at ease & very comfortable. He made himself very available to hop on the phone or answer emails/texts day or night and brought us a qualified renter in a very short amount of time. I would recommend working with him any day! "

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— Max Pomper, Landlord