John Mangini
Broker / Owner, Broker
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Testimonials
"
We worked with John in late 2023/early 2024 to sell our home and would highly recommend him as a realtor. He is very knowledgeable of the local market, dedicated and was always very responsive anytime we reached out.
We moved out of the area prior to listing our home and as remote sellers, it was especially important to us to have a realtor that we could trust with our home. John took care of many tasks on our behalf, including overseeing handyman repairs/maintenance and outdoor clean-up when a storm hit right before our first open house, among others. If we ever find ourselves back in the local market, John will be our first call.
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- Anonymous
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John Mangini is exceptional as a broker. He is confident because of his years of experience and knowledge of the market. He is calm and so easy to work with. He is diligent and relentless. His attention to detail is unparalleled and his willingness to have as many open houses as was necessary was amazing. I highly recommend him as a listing broker.
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- Frank Carotenuto
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I'd like to highly recommend my real estate agent, John Mangini, to anyone looking to buy or sell a home. From start to finish, John was incredibly professional, knowledgeable, and easy to work with. He took the time to understand exactly what I was looking for and guided me through every step of the process with patience and expertise.
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- user654411 (via Zillow) (Zillow Review - Sold a Single Family home in 2026 in Warren twp., NJ)
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We couldn't have asked for a better real estate agent than John Mangini. From our very first meeting, John impressed us with his knowledge, attention to detail, and thorough market analysis. He took the time to understand our goals and always made sure we had the information we needed to make confident decisions.
Selling a home could have been stressful, but John made the entire process feel easy. He was always responsive, patient, and willing to answer every question we had. We never felt rushed or pressured just supported every step of the way.
What truly sets John apart is that he genuinely cares about his clients. His professionalism, honesty, and dedication gave us complete confidence throughout the process, and his expertise helped us achieve a successful sale.
We are incredibly grateful for everything John did for us and would recommend him without hesitation to anyone looking to buy or sell a home. If you want someone who is knowledgeable, trustworthy, and a pleasure to work with, John is the person to call.
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- user03337519 (via Zillow) (Zillow Review - Sold a Single Family home in 2026 in Warren twp., NJ)
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John is extremely knowledgeable! He listed our house according to his research. Not only did it sell for the price agreed upon but we got over listing! He easy to work with and extremely helpful! Would highly recommend him and his team!
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- Denisemcsorley
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John did an incredible job helping us sell our house. His knowledge and marketing skills are best in class in the industry. If you want to get the best value for your house, you should use John - an incredible talent!
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- jmraymond322 (via Zillow) (Zillow Review - Sold a Single Family home in 2023 in Warren twp., NJ)
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You won't regret working with John.; he takes the time to understand your situation and then puts his sales machine into high gear. When selling the house it's other small touches that make the experience special - John was always helpful and available to open the house for a contractor or inspector, bringing in my garbage can, you name it, John was there. He's a GOOD GUY that made us feel special. Thank you John!
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- Michael Ryder
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John was very knowledgeable, professional and helpful in every possible way in selling our Warren home. He really went above and beyond providing help with his valuable resources. He even spent time with many trips to storage for us. The whole family was very grateful for John's help in making this selling experience a successful one.
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- Leeanne Wang
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John was critical to the successful sale. Interacting with town officials to be certain all inspections were cleared and certificate of occupancy was issued in a timely fashion. He also coordinated with the buyers broker to be sure they had what the needed cleaned up on final walk thru. He stayed with the project til the closing was official.
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- danc88 (via Zillow) (Zillow Review - Sold a home in 2026)
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John Mangini did an outstanding job in selling our house. John's knowledge, professionalism and guidance through every step in the process was truly remarkable. His recommendations with respect to listing price, house staging, marketing strategies and bid negotiations made him an invaluable resource. I will never buy or sell real estate without John in my corner.
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- the4kellers8 (via Zillow) (Zillow Review - Sold a home in 2025)
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John was an excellent realtor and a pleasure to work with throughout our home purchase. He was knowledgeable, responsive, and guided us through every step of the process with clarity and confidence. We always felt well-informed and supported. Highly recommend John to anyone looking for a reliable and trustworthy real estate professional.
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- Prajeet Gadekar (via Zillow) (Zillow Review - Bought a Single Family home in 2025 in Warren, NJ)
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John did an outstanding job assisting us with the selling of our home. His expertise on the local market was very instrumental in determining a competitive selling price for our home. He was very involved, always responsive in all the aspects until the closing. He is very polite and a thorough professional. Definitely recommend working with him.
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- Palak Shah
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John is extremely knowledgeable! He listed our house according to his research. Not only did it sell for the price agreed upon but we got over listing! He easy to work with and extremely helpful! Would highly recommend him and his team!
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- Denise McSorley
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John was critical to the successful sale. Interacting with town officials to be certain all inspections were cleared and certificate of occupancy was issued in a timely fashion. He also coordinated with the buyers broker to be sure they had what the needed cleaned up on final walk thru. He stayed with the project til the closing was official.
"
- danc88 (via Zillow) (Zillow Review - Sold a home in 2026)
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It was a pleasure working with John. He did an outstanding job and handle the sale very professionally. He was very helpful assisting with negations and leading us to a final agreement. I would definitely use him again.
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- queniacd (via Zillow) (Zillow Review - Sold a home in 2023)
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It has been a pleasure to work with John. He represented us as a buyers agent and helped us buy a house in a city where we knew nobody. He knows the local real estate market and gave us the right advice as needed. He never pressured us into doing something we were not ready for. John also responds really fast and overall he ensured our transaction was as smooth as it can possibly get. Even after the closing was completed, he still stays in touch and has been helping us settle into the new home. He gets a 5-star rating in all aspects!
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- A T
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John was a critical part of getting to the finish line on our home purchase. Always responsive and providing valuable knowledge along the way so we could keep the process moving. A pleasure to work with! Also very knowledgeable about the area.
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- Sharon Henderson
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Outstanding! My wife and I worked with many agents in our over 50 years of working with agents for our homes and our vacation and rental properties. John was the best: fair, honest, patient, and always helpful. Helped us gather the team we needed to both downsize and get everything ready. He sent in professionals to guide us at each step, and helped us work our way through the large number of offers. Would definitively recommend him and his team
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- Aisnerjo
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Excellent team, excellent realtor. Would highly recommend John Mangini to sell your home. I also worked with rental agent Judy Donovan to find the perfect rental home. Judy was caring, efficient and organized she made sure that our rental needs were fully met.
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- Skelble50
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John was critical to the successful sale. Interacting with town officials to be certain all inspections were cleared and certificate of occupancy was issued in a timely fashion. He also coordinated with the buyers broker to be sure they had what the needed cleaned up on final walk thru. He stayed with the project til the closing was official.
"
- danc88 (via Zillow) (Zillow Review • Sold a home in 2026)
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We were very fortunate to have worked with John in a dual agency transaction. John was a treat to work with from the very moment we met him. At no moment did we feel he wasn’t being fair to either party.
John is very professional, thorough and very knowledgeable of the local market. He is very responsive and understands his clients, making negotiations as stress free as possible.
Overall, the entire process went very smoothly due to John’s skills and advice. We are very happy with our new home but if we had to sell it, we would definitely rehire him.
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- zuser20180127160020702
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We had excellent experience working with John Mangini on the sale of our home recently. With over 20 years of real estate experience, he has an in-depth understanding of the local market and provided valuable insights throughout the entire process. He was always on top of every detail, dedicated to making sure things moved forward smoothly, and offered tremendous help when it came to dealing with the buyer. His professionalism, punctuality, and commitment truly stood out – he was always on time for every meeting and consistently went the extra mile. We would highly recommend John to anyone looking to buy or sell a home.
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- Wei Lin
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If we could give John more than 5 stars we would!
From the early stages of the process to the end, John offered invaluable guidance and experience. He was always available to respond to our many questions, whether it be the weekend or after hours. His in-depth knowledge of the local market led to both a quick and seemless sale of our home.
We moved out of state several days prior to closing. During that time, John went above and beyond by tending to the little things; like pool maintenance and checking our mail.
We highly recommend John to anyone looking to list their home.
A big thanks to John for all your hard work!
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- Tim Overzat
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John is very knowledgeable, communicative, and pleasant to work with. He streamlined the entire house-selling process. We would work with him again if we were still in the area!
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- Janice Skorstad
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John was great!
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- John Mangini
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We first met with John in late 2021 as we were about to make an offer on a new home out of state. He described the current local market, the process in general and his thoughts around selling as quickly as possible while still maximizing our offers. He gave us a lot of very specific directions for preparing our home for sale, most of which we followed closely. None of his suggestions were expensive, radical or excessive.
We officially put our house on the market with an Open House. 34 parties came to the Open House, and within 48 hours we had SIX offers, all over asking price, one of them almost 10% over! John credits our hard work to prep the house, but we credit his expert guidance and excellent marketing skills. If you want to sell your house fast and get top dollar, John Mangini is the Realtor you want to hire!!
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- Dan Hunt
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Outstanding! My wife and I worked with many agents in our over 50 years of working with agents for our homes and our vacation and rental properties. John was the best: fair, honest, patient, and always helpful. Helped us gather the team we needed to both downsize and get everything ready. He sent in professionals to guide us at each step, and helped us work our way through the large number of offers. Would definitively recommend him and his team
"
- Joe Aisner
"
Excellent team, excellent realtor. Would highly recommend John Mangini to sell
your home. I also worked with rental agent Judy Donovan to find the perfect rental
home. Judy was caring, efficient and organized she made sure that our rental needs were fully met.
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- Sue Kelble
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John made the whole process smooth as glass. He anticipated my needs every step of the way and made it easy to sell my property. All the advice he gave me for finishing touches and the care and attention to detail he paid to the photos and the listing were worth every penny.
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- mryder1991 (via Zillow) (Zillow Review - Sold a home in 2024)
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John Mangini is the real MVP when it comes to the entire process of preparing, pricing, showing, and negotiating for a successful sale of a prized residence. His data-driven approach and knowledge of the market frame the sale pro-forma, and his constant communication and negotiating skills make the execution professional and timely.
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- buoys library0z (via Zillow) (Zillow Review - Sold a Single Family home in 2026 in Warren twp., NJ)
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John put extra time and effort to make this deal happen on time where I had to do 1031 transfer to another property. Timely closing was really important to me and John made this happen as he was on top of all the issues on daily basis and kept me up-to-date on everything with this closing.
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- gurindergill20083 (via Zillow) (Zillow Review - Sold a Vacant Land home in 2023 in Warren twp., NJ)
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John was my realtor for sale of my house in warren. I couldn’t have asked for a better representative. Simply Selling a house is not what a great realtor does. It also requires promptness,, patience and experience in the applicable market. A good realtor like John can advise on repair contractors if needed, movers and other service assistance. And of course , it requires someone who is a good go between with the other realtor. John did it all. He was always available when I called. He would meet personally whenever needed. And if I had a question, he either knew the answer or researched it for me. If you are thinking of selling or buying. John and his team are really thr best choice by far . I am positive he won’t disappoint you!
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- Robert Fagella
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John was a pleasure to deal with and was always very patient with us. He guided us through the entire sales process with the his unmatched professionalism. He provided sound advice on the offering price and also assured us that our entry onto the market was not too late as my wife and I thought that November was too late to be going on the market. That proved not to be the case.
John always made himself available to provide access into the house for the buyers' inspectors and in many other cases where vendors needed access into the house. Additionally, on numerous occasions when we had questions or needed John to come over, he made himself available immediately.
My wife and I would highly recommend John as a broker when you might decide that the time has come for you to sell.
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- Rob Sattler
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John Mangini priced our home accurately, taking into consideration all the extra features which added to its value. He responded immediately whenever I had questions and was always generous with his time when I had a special request. He is very knowledgeable in all aspects of the real estate business.
Genny Trenson
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- Genny Trensen
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For this senior, single homeowner making a first home sale, John was the perfect choice.
Having regularly received John's data analysis mailings of the real estate market in Warren, I knew he had a deeply studied knowledge of home values. When my time to move arrived, I read his numerous client reviews as well. Now, post home closing, I can heartily verify the excellence expressed is definitely not overstated. Although visitors to my home regularly made positive comments, John's recommendations for bringing it to market readiness yielded most welcome results. Contracts came in quickly from the well-attended Open House. In 2025's turbulent market, John's extensive expertise and professional demeanor quickly gained my confidence. His willingness to help with the smallest details, thorough explanations of every step of the process, and quick response to my calls, confirmed throughout that I could not have made a better choice for a realtor.
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- usm505 (via Zillow) (Zillow Review - Sold a home in 2025)
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John did a wonderful job selling my Dad's home during this most difficult time for me. This home was not an easy sell, but John got it sold quickly with countless open houses and his knowledge of the housing market. John also helped meet contractors at my dad's home when I couldn't and his professionalism really shined! I highly recommend John. His expertise and guidance was second to none!
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- Reach150 User
"
We first met with John in late 2021 as we were about to make an offer on a new home out of state. He described the current local market, the process in general and his thoughts around selling as quickly as possible while still maximizing our offers. He gave us a lot of very specific directions for preparing our home for sale, most of which we followed closely. None of his suggestions were expensive, radical or excessive. We officially put our house on the market with an Open House. 34 parties came to the Open House, and within 48 hours we had SIX offers, all over asking price, one of them almost 10% over! John credits our hard work to prep the house, but we credit his expert guidance and excellent marketing skills. If you want to sell your house fast and get top dollar, John Mangini is the Realtor you want to hire!!
"
- zuser20140808115551004
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Excellent Agent
John Mangini guided us through a very difficult decision - to sell our home of 38 years. All phone calls to John were answered or returned promptly. John was always polite and reassuring, always answering our concerns. We lived out of state when our house was listed with John. John and his assistant, Laura Healy took great care that our unoccupied house was well cared for - staging done, etc.
Overall , John Mangini went the extra mile as a Real Estate Agent.
"
- chagman62 (via Zillow) (Zillow Review - Sold a Single Family home in 2016 in Warren, NJ)
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John's extensive market knowledge, both of the selling and rental landscapes provided me with the insights needed to make informed decisions about my property. His practical approach was particularly valuable. He didn't just list my options; he delved into detailed analyses, presenting scenarios for selling outright, renting, and even a rent-to-sell strategy. His expertise shone through as he explained the potential returns and market dynamics associated with each option. In an industry where agents might prioritize their commission over client needs, John stood out by focusing on what was best for me and my property. He was upfront about the pros and cons of each decision, especially in screening potential renters. John has a keen eye for detail and a knack for problem-solving, qualities that were crucial in managing the complexities of tenant selection. John truly functioned as a trusted real estate "consultant," offering practical recommendations and genuine care for my best interests. I would highly recommend John to anyone looking to navigate the complexities of the real estate market with a reliable, expert, and honest partner at their side.
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- user0078818 (via Zillow) (Zillow Review - Found a tenant for a Single Family home in Warren, NJ)
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I highly recommend John if your looking to buy or sell your home. He is very knowledgeable with the process and with the area. His response time is one of the best I've seen and I've been in business for over 20 years. Thank you John for making this process so smooth and less stressful for my family.
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- spcarwash0
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Working with John Mangini [NextHome Premier] was truly a game-changer for our home-selling experience. His impressive background in engineering provided a unique edge, especially when it came to evaluating the structural integrity of properties and identifying areas for improvement before listing the property. He organized handymen for touch jobs. His analytical skills and data-driven market analysis were second to none, helping us price our property competitively and navigate market trends with confidence.
What truly made John Mangini stand out was his dedication and willingness to go above and beyond. He not only provided expert advice but personally assisted with cleaning and hauling items to prepare our property for showings/ after close out. This level of care and investment is rare and speaks volumes about this commitment to their clients' success.
His clear, data-backed communication and strategic approach made the entire process smooth and stress-free. Whether you're buying or selling John Mangini is the real estate agent you want by your side. We couldn't be happier and will recommend him wholeheartedly to anyone looking for top-tier service!
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- Sasi Arunachalam
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It has been a pleasure to work with John. He represented us as a buyers agent and helped us buy a house in a city where we knew nobody. He knows the local real estate market and gave us the right advice as needed. He never pressured us into doing something we were not ready for. John also responds really fast and overall he ensured our transaction was as smooth as it can possibly get. Even after the closing was completed, he still stays in touch and has been helping us settle into the new home. He gets a 5-star rating in all aspects!
"
- Aravind Tula
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John is by far the best realtor to work with! His marketing skills, expertise and professionalism are exceptional. He is always available for questions and goes above and beyond to get the house sold! We were so impressed with him and highly recommend him for buying or selling your house!!!!!
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- kxz7fcv9gk (via Zillow) (Zillow Review - Sold a Single Family home in 2023 in Warren twp., NJ)
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John was very helpful & easy to work with. Selling process was explained clearly & all questions were addressed timely. Listing price was spot on ! & house sold quickly for more than asking. I would definatly reccommend John for all your buying/selling needs !
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- ddbwater (via Zillow) (Zillow Review - Sold a Single Family home in 2025 in Warren twp., NJ)
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John was wonderful to work with, knowledgeable, patient. Everything we needed to make the process easy. I would highly recommend John to anyone who is thinking about selling their home.
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- beverleyslobo (via Zillow) (Zillow Review - Sold a Single Family home in 2026 in Warren twp., NJ)
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John did an excellent analysis of the market and suggested a strong pricing strategy. Open house foot traffic was excellent and multiple offers were quickly received, at and above asking price. He helped facilitate selling furnishings and a rental agreement so we could remain in the house after closing. He always replied promptly to my requests for info and clearly communicated what I should expect from the process (when to be out of the house or available for the lawyer). I definitely recommend him to other
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- Lynne Draper
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John is very knowledgeable, communicative, and pleasant to work with. He streamlined the entire house-selling process. We would work with him again if we were still in the area!
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- user8378267
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I could not have had a better realtor. John demonstrated all of the above and even more. He went above and beyond what was expected of him to sell my home which at times became difficult. He always returned my calls and answered all of my questions. I would definitely recommend him to anyone who needs an excellent realtor.
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- Ellyn Jara
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John Mangini came highly recommended to me as I was about to sell my mom's house, the house I grew up in, so there was a strong emotional side to this. John is the most caring person. He scheduled open houses, followed every lead, reported back to me on all leads, since no one was living in the house he would always let me know how many showings were scheduled for the day. John stayed on top of everything. We were going to be away and John even kept an eye on the house. I would not hesitate to recommend John to anyone buying or selling. You would be in good hands!
Sue Lovenguth
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- Sue Lovenguth (via Zillow) (Zillow Review - Sold a Single Family home in 2023 in Warren twp., NJ)
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John did a great job!
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- Yee Jao
About John Mangini
John Mangini is a Warren Township–based real estate broker and owner of NextHome Premier. He has represented buyers and sellers in Warren and surrounding Somerset County communities since 2002.Based on analysis of Garden State MLS residential sales data from 2002 to present, Mangini consistently ranks among the top-performing listing agents in Warren Township for pricing accuracy, sold-above-list outcomes, and cumulative closed volume.
His results reflect a pricing-first strategy focused on minimizing time on market, reducing price corrections, and converting demand into stronger final sale terms.
Median sale-price-to-original-list-price ratio consistently among the highest in peer comparisons
One of the highest percentages of homes sold above original list price since 2020
Lower-than-peer incidence of price reductions, indicating stronger initial pricing accuracy
Continuous Warren Township transaction history dating back to 2002
Areas We Cover
MLS® Disclaimer
The data relating to real estate for sale on this website comes in part from the IDX Program of Garden State Multiple Listing Service, L.L.C. and NextHome Premier. Real estate listings held by other brokerage firms are marked as IDX listing. Information deemed reliable but not guaranteed. Copyright © 2026 Garden State Multiple Listing Service, L.L.C. All rights reserved. This information is being provided for Consumer's personal, non-commercial use and may not be used for any purpose other than
to identify prospective properties Consumers may be interested in purchasing
The dissemination of listings on the website does not constitute the consent required by N.J.A.C. 11.5.6.1 (n) for the advertisement of listings exclusively for sale by another broker. Any such consent must be obtained in writing from the listing broker.
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The data relating to real estate for sale on this web-site comes in part from the Internet Listing Display database of the ALL JERSEY MULTIPLE LISTING SYSTEM, INC. Real estate listings held by brokerage firms other than this site-owner are marked with the ILD logo. The ALL JERSEY MULTIPLE LISTING SYSTEM, INC. does not warrant the accuracy, quality, reliability, suitability, completeness, usefulness or effectiveness of any information provided.
The information being provided is for consumers' personal,
non-commercial use and may not be used for any purpose other than to identify properties the consumer may be interested in purchasing or renting.
Copyright 2026, ALL JERSEY MULTIPLE LISTING SYSTEM, INC. All rights reserved. The ALL JERSEY MULTIPLE LISTING SYSTEM, INC retains all rights, title and interest in and to its trademarks, service marks and copyrighted material.
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