In my view, John Harrison is the most honest, hard-working real estate agent in NYC. He is a consummate professional and always goes above the call of duty. John helped us in buying our condo in NYC and later assisted in renting it. He was always there to help us navigate the complex NYC real estate rules and provided appropriate guidance throughout the process. I would highly recommend John as a real estate agent to anyone who is looking to buy, sell or rent a place in NY.

-Bobby W.

Nicole is a very polished and knowledgeable real estate professional. Her keen sense of luxury and value guided me to the right purchase on my Manhattan property. And she makes it so fun with her great sense of humor. I highly recommend her.

-Bill R.

I worked with Mike and the team from the Core group in my apartment hunting. They were really helpful throughout the process, and they make the whole process very smooth and fast too. The whole communication was very prompt and transparent, and I would strongly recommend to anyone who is on apartment hunt in New York City.

-Yuvraj B.

Hannan was a great partner to work with in the overwhelming experience of apartment hunting in the city. She managed to work with my busy schedule to find a place that met my needs and was within budget. She worked diligently to get me a home in the location that I wanted and was suitable for my lifestyle. I would highly recommend her to anyone navigating the process of finding a home in the city.

-Zainab H.

As someone who was unfamiliar with the NYC real estate market, I found the process of finding an apartment very complex and daunting. Nicole Grandelli and her team at Core Group made everything so much easier and they even got some of the move-in fees waved. I honestly think I would have given up mid-process if it were not for Nicole. Nicole and her team were prompt, honest, transparent and good at communicating throughout the process. Now that we have the apartment, they have been great at answering questions and making sure we have our utilities turned on. I would not hesitate to recommend the Harrison Grandelli Team at Core and will use them again for any future NYC real estate transactions. Thank you!

-Angela B.

Their many years of sales in residential real estate in NYC greatly enhances their value. Their superior knowledge of the many desirable New York City neighborhoods streamlines the search, saving much time and money.

-Michael M.

So, where do I start? I live in Massachusetts and I inherited some property in Brooklyn, NY. I struggled to attempt to sell it on my own unsuccessfully. Then while my wife was having breakfast with my daughter at a hotel she ran into John and his family and started discussing our situation. John offered to give us advice with no strings attached, and no pressure to be my agent. Of course, I was suspect, but eventually, through our discussions, I could see John was just trying to help me. I came to trust John and started to work with him on the sale. After taking his advice and taking his direction he took us from a sale that was SIGNIFICANTLY below what I was asking to double what I was looking for. He handled the process of getting the property in a shape that drove interest through the roof. Took care of the showing of the property and negotiated the bidding war on my family’s behalf. He ensured that we received the strongest offer and brought a difficult situation to a wonderful conclusion. I couldn’t have asked for a more professional individual to guide me through this entire process. The one thing that impressed me the most and for anyone reading this review, is I have yet to meet John face-to-face. I have never met John. We conducted this entire process while I was in Massachusetts and he was in New York. John was so honest that I left this entire sale in his hands and I will tell you it was the best thing I ever did. Thanks to him I am currently building a new house and have the finances to pay the entire house off and provide for my family thanks to John. And this all happened because John saw a family in need of some direction and some help that he didn’t know. He didn’t have to help us at all but that tells you about his character as a person. I will forever be in his debt, and if you are considering working with John, trust me, you want John and his team in your corner. Hands down, he will not steer you wrong, and take his advice because it will be the best move you will ever make. Thank you, John, from my entire family.

-M. Johnson

The team at Harrison Grandelli is seriously top-notch. I had the pleasure of working with Evan Roth and he helped me find my dream property!

-Frank T.

Nicole Grandelli has always treated me with great respect and an understanding of my needs. This is an organization that can be trusted.

-Lynn S.

John is a very smart and knowledgeable broker who understands the New York market very well. He has guided us through the complexities of a 1031 exchange, explaining things in a very clear way and helping us to find the right people, from mortgage brokers to insurance agents. He was also very helpful to find new tenants and even taking on the role of a superintendent to make their rental start as smooth as possible.

-Markus J.

The best realtors in town. They worked hard in the middle of a series of rate hikes from the Fed to sell our apartment for a record sale in the complex. I cannot recommend this team enough!

-Daryush N.

Nicole and her team were INCREDIBLE partners to work with. I worked closely with Nicole and Evan for several months and always felt like I could reach out at any point and would get an answer so quickly. I can't imagine my NYC home-buying process without their dedicated support - they are truly spectacular!

-Selin E.

Hannan Salah was amazing at helping me find a new home in new york city. We went through all of queens and brooklyn together and hannan was able to coordinate all of that for me. I'm particularly picky and Hannan and the Harrison Grandelli team were able to coordinate with that to find my dream apartment in NYC. Thank you so much! You guys rule :)

-Sami

Very knowledgeable and always available, John Harrison has successfully rented and managed more than a dozen of our rental properties and brokered the profitable acquisition or sale of many other real estate assets. Recommend his services without reservation.

-Mark M.

Working with Nicole to find my first home was a great experience. Nicole did an effective job of hearing my specific needs and translating that into a pretty quick purchase. Nicole is my go-to person with any questions regarding New York City real estate!

-Galin M.

My husband and I worked with John to sell our co-op in Ditmas Park (Brooklyn). He worked tirelessly to ensure that we received 5-star service. He found us a buyer before the apartment was even posted. He took pictures, conducted the open houses, contacted the tenants to schedule the open houses, and dealt with the doorman and management office from the beginning until the closing date. He did it all. John kept us abreast of everything. He was amazing, professional, and all-around cared about the process as if he was selling his own place. He listened to our concerns and needs and was able to get us a buyer within record time and at an above-asking price. We could not ask for a better real estate agent. John is the best realtor I know and we wholeheartedly recommend him.

-Paul D.

Hannan, Nicole & The Harrison Grandelli Team helped me find my new home in NYC. They were incredibly helpful and responsive, making the entire process easy and stress-free (which isn’t usually the case in finding a place in NYC)! So grateful to have met them.

-Soorin L.

John was incredibly professional, knowledgeable, down-to-earth, and above all else, very honest with the sale of our apartment. His expertise and kind approach really have him stand out in the industry. We highly recommend him for any real estate needs.

-Marissa B.

Working with this team, Hannan in particular, was a pleasure. Their level of professionalism and transparency is unparalleled! Hannan patiently listened to our list of asks, put together a compelling list of apartments to visit and guided us during negotiations. We are now excitedly waiting to move into our perfect place! If you’re dreading navigating the NYC real estate market, highly recommend you do yourself a favor and give them a call!

-Ezana D.

John Harrison is a gentleman who listens closely, pays attention, and is always focused on his clients' needs and desires...and thus remains flexible in his options and advice. He is highly knowledgeable in the realities of the real estate market and tireless in his work and sincere in his communication. John is a pleasure to work with and a pleasure to know.

-Elizabeth M.

I started my home search in Fall 2015 and I was looking in Brooklyn. I currently live in Queens and I do not know the Brooklyn area very well. Before I met John, we had a phone conversation to understand my needs and help me think through the process. He also sent me a comprehensive financial checklist on purchasing a home. John met with me on a Sunday afternoon and selected open houses in different areas of Brooklyn for me to view. He educated me about the neighborhoods, buildings, financial aspects, etc. It was the most thorough real estate professional experience I had been through. When I received an offer in Queens through a friend to purchase his home, John offered to brainstorm with me about the opportunity. Even though John would not financially benefit if I purchased the Queens apartment, he spent an hour looking at the apartment online with me and follow up. I highly recommend John Harrison for his integrity, professional knowledge, and passion for working in the interest of his clients.

-Noreen G.

John is a very well-rounded Broker, who's always looking out for the best interest of his client. He's very knowledgeable about the New York City Real Estate landscape. He's always open about fees and the negotiation process. We're now working on our 3rd corporate apartment together, and it's always a pleasure.

-Carrie T

Parents Perspective - We joined my daughter to view potential properties as she's making the move to NYC from Atlanta. We worked with Hannan on the recommendation of a friend also from Atlanta. Hannan sent the initial properties prior to our arrival and updated each day while we were in the city. Quickly zeroed in on our interests and musts. New listings coming over at close to midnight each evening - needless to say she worked tirelessly. She exceeded ALL of our expectations. Also her customer facing skills are exceptional and paralleled by her market expertise. We had a great experience as a result of her friendly approach to out of towners and her professionalism! If want representation with high skills, energy and integrity you want to call Hannan - Thanks again Hannan, we couldn't be happier!!!

-Daniel T.

John worked true magic for my family and me. We put our house on the market while looking for one to purchase, but we’re in a sticky situation in that we absolutely needed to sell ours first. John was extremely knowledgeable about the Real Estate market in our neighborhood and was able to council us thoughtfully without being pushy. He was extremely patient, grew quickly to understand what we were looking for, and found us the home we were looking for. Simultaneously, he sold our home at the rate we needed to make the other transaction happen. We were over the moon and remain extremely grateful. John is professional, friendly, understanding, patient, and extremely knowledgeable.

-Morgan P.

John was extremely helpful in helping us find a home along with the myriad of details including financing and general things to look for when accomplishing this feat. I would trust John over anyone.

-Randall L.

John has helped us find our initial apartment on the UES and then, after a messy situation with the UES Landlord, helped us to relocate to Brooklyn Heights 4 months later. He is patient, professional, kind, thorough, and very knowledgeable. He met us at every location, he helped us to negotiate a lower lease amount, and he put up with numerous calls at all hours of the day - we highly recommend him!

-Michael S.

John Harrison recently handled all aspects of our real estate transaction and we had a great experience. He is knowledgeable, professional, friendly, and made the process stress-free. What separates John from the rest is the time he spent understanding our goals and strategizing with us how to meet them. Additionally, he went above and beyond to prepare our apartment for viewing (arranging cleaning service, painters, furniture removal, etc.) We are extremely happy both with our experience and the relationship we have with John and we highly recommend him

-E Sternn

It was time for a new apartment! I had just given birth to a baby boy and while the baby didn't take up much space, all of his accessories did. John went to work finding an apartment for us. Luckily we had a flexible move-out date because John found an apartment that was a short sale. Short sale purchases are more complicated than normal sales and John carefully explained each step along the way. He was very patient when I had questions or concerns and always made sure my questions were answered in a way that made sense to me. John was personable, professional, knowledgeable and an excellent negotiator. He saved us over $100,000!

-Christina H.

John Harrison is the ultimate professional. When I needed to rent out my NYC 5th Avenue Apt. I went to him and the 1st couple that walked into my home, took it... no questions asked... not even did they try to bargain the price John and I agreed upon. When they moved out 2 years later, John took it into his own hands and made sure that everything ended perfectly well for both my tenants and I... hard to find that these days. I highly recommend him to anybody looking to Buy or Rent a Home or Sell or Rent out their property in New York City. This man is a true gentleman, knows his game well... not to mention an excellent family man and a great friend that he has now become of mine. If I had to come up with one word to describe John Harrison that would be TRUSTING.

-Mel G.

John sold my apartment in 2013 we had several offers on the table and we were able to get the full asking price. John is very knowledgeable in what he does, he listens to the client’s needs and puts in perspective what was best for me, and most important he delivers.

-Oscar C.

Wow! I can't say enough wonderful things about our experience with John Harrison. Right after my husband and I got married, we were looking for a new apartment to call home and John made that happen. He took all of our criteria and budget into account, only showing us apartments that he knew would meet all of our needs. None of this running all over the city to look at places that would just be wasting our time. He was organized, knowledgeable, efficient, professional, QUICK to return emails/calls/texts, really listened to what we wanted, and was an overall joy to work with. I would recommend him to any of my friends or family looking for a spot in New York. He's absolutely the best there is!

-Casey S.

John is THE BEST! I have had my share of experiences with a variety of brokers.. male, female, sellers, buyers, younger and more current, older and more experienced, and far and away on all counts, John is awesome. I cannot speak his praises enough. He was helpful throughout the process on a professional level in his capacity as my realtor, and on a personal level addressing my needs as I parted with my beloved apartment. He is smart and skillful in his approach and was amazingly personable to me and all parties involved in a potential deal. Not to mention I had one particularly difficult situation, and he handled it with ease and grace. I hope this review isn't shrugged off as too positive, but I truly have nothing negative to say.

-Chloe M.

After meeting with three brokers, John included, it was a clear choice that John was who I wanted to work with to sell my condo. John came to the initial meeting well-prepared with market data and having considered specifically my unit and building. Not only did he provide updated knowledge of the market, but also he listened carefully to my goals as he assisted me in determining whether to hold or sell my apartment. Once I determined I would sell, John marketed my unit extremely well and when it was listed there was excellent activity very soon. John was detail-oriented and conscientious consistently throughout the process right to the closing. I relocated before my apartment was sold and John stepped in making sure my apartment was ready for the open houses and secure. John operates with a high level of integrity and professionalism and it is a pleasure to work with him.

-Suzanne H

There is an experience to be witnessed with this team. Advice, knowledge, and positive perspectives pave a path into unique opportunities. Treated with respect. Valued because they’re professional, affable, and simply put — kind!

-Gregory B.

John Harrison has a passion for Real Estate. He knows NYC and understands the ever-evolving real estate market that is NYC. John has his finger on the pulse of what is going to be the next hot neighborhood or the best buy for the first-time buyer or the seasoned investor .. He cares deeply about his clients and I have never met a more honest and hardworking broker in my 14 years of living in NYC. John has helped me and my family through multiple real estate scenarios and apartment shopping all over NYC. Each experience with him has made us excited for the next time we can work with him as a broker who will go above and beyond the call of duty to get the job done with a unique approach. Thanks, John for all you do!

-Patrick E.

John was an absolute delight to deal with. He walked me through a somewhat complicated purchase seamlessly and was always available to offer honest and sage advice. I would and have recommended him to friends without hesitation.

-Baz C.

John provided me 5-star service even though my budget was very tight and the process was like looking for a needle in a haystack. While most other agents I worked with through the process put me at the bottom of their list, I never felt like that with John. He was proactive to get the info needed to best negotiate, educated me at every step of the way, and patiently worked with my verbal processing style as I figured out an initial offer (great devil's advocate). John developed great relationships with the seller's brokers wherever we went. I was also able to count on John to refer me to lawyers and other providers that delivered the same high-quality service. I'm very excited about my purchase!

-Sandra Z.

I’ve benefited from John Harrison’s very able navigation through multiple real estate transactions, and there is no one I’d rather have in my corner. Here are a few reasons why I say that:

Knowledge and real estate skills-John is a student of all things real estate, has a passion for the market, and his clients regularly benefit from his knowledge, forged by experience and ongoing training, of best practices, market developments, and pitfalls to avoid.

Strong representation/negotiation skills and commitment-John works tirelessly to understand and take action on his client’s needs and desires, keeping those interests front of mind. His ability to think on his feet when needed, even in the heat of the moment is uncommon. I’ve always felt at rest and confident knowing John has my back.

Communication and Intelligence John has regularly distilled complicated real estate requirements and situations into readily understandable concepts for me, giving me peace of mind at every turn.

Integrity and Service-I’ve never had to question John’s commitment to do the right thing, and his desire to add ongoing value, even years after (or before!) a transaction is remarkable. John has generously given of his time and effort on my behalf, even when there is no financial benefit for him.

-Jerry B.

John Harrison and his team helped my family and I with multiple rental and the purchase of our apartment with such professionalism and efficiency. It has always been a pleasure to work with him.

He has made it extremely easy for us to find the perfect tenants in a short time. I highly recommend his service to anyone looking to move to NYC

-Victor T.

I highly recommend John Harrison! He sold my Manhattan co-op apartment during the worst pandemic period at my asking price. He put so much effort and work into it. He was very responsible, responsive and reliable.

When trouble happened, he helped me figure it out and get thru it without too much stress. I will definitely work with him again when I will sell my next apartment. You won't be disappointed!

-Sazzie Z.

John worked tirelessly to find us the perfect location. He and his team know the market, genuinely care about their clients and make the process of finding space in NYC completely seamless. If you are looking for a team that is focused you and your goals, there is no better choice in NYC real estate!

-Dawn P.

John Harrison and the Harrison Grandelli team are my go-to consultants for all of my real estate investments. Their knowledge of NYC is unsurpassed, and i am always blown away by their customer service. I would highly recommend them to anyone seeking real estate assistance in the city.

-Carol D.

My daughter was moving to Manhattan for her first job and Mike Taddonio was absolutely wonderful! He went above and beyond to help us find a place from out of state. He went to apartments and sent us videos of not only the apartment but the building's common places and street. He educated us on the real estate process and the neighborhoods since it has been years since I lived there. I highly recommend Mike and will definitely use him in the future.

-Beth L.