Mario Greco

Founder and Leader of The MG Group



Born and raised in Chicago, Mario Greco came to real estate by way of engineering and law. He graduated with honors from both Northwestern University (with degrees in Chemical Engineering and Environmental Engineering) and Boston University School of Law. He practiced law for several years at Jones Day and Kirkland & Ellis in Chicago in their Intellectual Property Litigation departments. While practicing law full time, he started his own real estate brokerage firm and sold an average of $9M worth of real estate a year on a part-time basis. Since then, Mario’s business has grown significantly while partnering with companies such as Century 21 Sussex & Reilly, Prudential Rubloff Properties, and now BERKSHIRE HATHAWAY HomeServices Chicago.

Throughout his career, Mario has consistently proven to be a top producer. He has been recognized as being in the top 1% of Chicago Realtors® every year since he started selling real estate in 2002, and his total sales have already amounted to nearly $2 BILLION. Mario and The MG Group have been ranked Top 50 in the Nation every year by The Wall Street Journal since 2011, have been recognized as a Notable Residential Broker of 2019 by Crain’s Chicago Business, and were awarded Best Team in 2019 and Best Agent Website in 2020 by Chicago Agent Magazine. Mario has been the city’s top producer in key neighborhoods over the years such as Lincoln Park, Lakeview, Lincoln Square, Andersonville, Edgewater, Wrigleyville, Irving Park and Old Irving Park, Avondale, Sheridan Park, Buena Park, Uptown, Ravenswood, Roscoe Village, St. Ben’s, North Center, and Bucktown/Wicker Park.

As the founder and leader of The MG Group at BERKSHIRE HATHAWAY HomeServices Chicago, Mario oversees all pricing strategy, marketing plans and buyer/seller negotiations for all Group clients, and ensures that the Group operates with market-leading expertise and optimum efficiency. He is proud of The MG Group’s widespread recognition for their unique ability to deliver both speed and value to their clients throughout every real estate transaction.

Business Details

Year Established

Service Areas

Lincoln Park
Irving Park
Sheridan Park
Old Irving Park
Roscoe Village
St. Ben's
North Center
Buena Park
Wicker Park
Chicao, IL, USA


Additional Resources


From the moment of contact with Mario Greco to the completion of our real estate transaction, Mario and The MG Group provided the best real estate experience. We were always kept informed of the progress and outcomes as we went through the process of selling our condominium. No matter the time of day or evening, our communications were always responded to very promptly, which added to our reassurance. Unlike other real estate agents, Mario Greco and The MG Group are insightful and have a unique understanding of how personal and emotional a real estate transaction can be. All aspects of our transaction were managed in the most respectful and discerning manner by very experienced professionals. We highly recommend Mario and The MG Group because of their ability to achieve successful results in a short amount of time.

John & Cathy

There were three things that made working with Mario and his team a joy, especially compared to our experience working with other agents in the past: 1) Communication - Any time we had a question, no matter the day of the week or the time of the day, it was answered promptly and thoroughly. There were multiple occasions where we were impressed by rapid responses to our questions. If an answer was more complex, or we weren't quite grasping the strategy behind negotiations or other items, Mario was quick to pick up the phone and call us to thoughtfully and patiently explain. 2) Professionalism - The MG Group knew what they were doing at every step of the process. The transition between those steps was flawless and we were impressed with the polish of every member of the team. Everything was done right on time, the first time. 3) Results - Without Mario's direction, we would have left money on the table. Specifically, his ability to navigate our competing offers with grace was key. He identified red flags we would not have thought twice about. Had he not steered us in the right direction, our bottom line would have been negatively impacted, but the marketing strategy, negotiation tactics and closing were flawless. Selling our home was a stressful process but the MG Group was our rock. We would not hesitate to use Mario and his team for future transactions.


The MG Group has raised the bar on real estate professionalism. The MG Group continue to excel in their knowledge of the real estate market trends to provide the best results for their clients. What also sets the MG Group apart from other real estate brokers and agents is their outstanding communication skills with their clients. Not only do they provide immediate comprehensive updates on property showings but they also provide weekly updates on trends including the market competitors. In addition, emails and phone calls are always returned immediately. For these very reasons we used the MG Group when selling 3 different properties over a 2 year span. All 3 properties sold within 30 days at close to the asking price, verifying that Mario and his team have a good understanding of the pulse of the area real estate market. The last property they sold for us had several complications which had impacted previous sales contracts with another broker. While aware of the issues, the MG Group stood up to the challenge and overcame these complications to get the property sold and closed quickly. During every experiences with the MG Group, we had total confidence in Mario and his team. We were absolutely sure that the MG Group would get the job done and give us the best results at the best price price during the predicted time frame. We would highly recommend the MG Group for all your real estate transactions.

Nick & Pam

I can not express how great Mario and his team are. They made buying and selling extremely easy and we were extremely impressed with the entire team throughout the process. More than anything else their responsiveness was incredible and regardless of the time we may have reached out, we had an answer within an hour if not within minutes. At one point we needed to have our HVAC system looked at ahead of a showing and Mario's team not only recommended a company, they called and scheduled the visit, and when I had a conflict at work at the last minute they sent someone to our house to oversee the visit. We interacted with a number of brokers through the buying and selling process and can honestly say that none compared to Mario and his team. If you are buying or selling a home in the Chicago area, please call Mario.


I picked the Mario Greco Group because they produce results by knowing how to price effectively. I tried to sell on my own and when nothing was happening I knew I needed someone who had a vast market of prospects. What I did not expect was the ease in which they made my house sale for me. From the initial phone call when interviewing this firm to the final steps after closing, I literally didn't have to do anything except give personal info for necessary paperwork. Dealing initially with Mario in deciding where to price my property was easy based on his knowledge of market evaluations. My house sold within days because of this knowledge. His staff constantly kept me in the loop on a daily basis and offered suggestions which were beneficial to my sale. They were great! I would recommend the Mario Greco Group in a heartbeat. Thanks again for making my sale quick and easy.


I researched many realtor options before choosing Mario Greco of MG Group. I was impressed by his fantastic ratings, reviews from former clients, and expertise in the Lincoln Park area (where my condo is located). Mario and his group did a wonderful job. Not only was he wonderful in walking me through every step of the process, but all of his recommendations for staging, marketing, showing, and negotiation led to a higher sale price than I ever thought possible--much higher than my estimated value on any of the real estate applications. From our very first interaction through the closing I was impressed with Mario's professionalism, his ability market and position my condo to obtain the best final outcome. I was so happy with the final outcome of my sale that I will be sure to use the MG group for future sales or purchases that I may have in the Chicagoland area. He is a wonderful representative and will guide and take care of you each step of way. Hiring him was the best decision I could have made!


We originally contacted Mario because friends of ours had used him and the MG Group to buy/sell and had also noticed his signs around our Albany Park neighborhood. We also had been working with another agent in our search for a new home in the North Shore and it wasn’t working for a variety of reasons. When we first spoke with Mario he assured us that the MG Group would be able to help us sell our home in the city and buy a new home in the suburbs. Although skeptical at first, we could not have been happier with the result. Lehigh of the MG Group was tenacious, thorough and patient throughout the process and guided us to a home we couldn’t be happier with. On the list side, Mario gave us great advice on how to prepare our home for sale, where to price it and also had contractors at his disposal to enact the prep plan. We sold our home in just a few days with multiple offers for above our list price and we didn’t waste money or time doing unnecessary things to prepare it for sale. Mario assured us the market was brisk enough and our home was unique enough that we would be able to sell without renovating the home we had lived in and lovingly cared for for 30+ years. Once engaged, we felt comfortable from the very beginning of the process with Mario, Lehigh and the entire MG Group office staff which worked tirelessly (and seemingly around the clock) to see our deals get to the closing table without a hitch. We have sung their praises to our friends, family & coworkers, and we would urge anyone who wants to buy and/or sell in the city of the suburbs to contact Mario and the MG Group – they are true experts and professionals.

Michael & Celeste

Mario and The MG Group,
You were the second Realtor we engaged during our quest to sell our Lincoln Park home – how we wish you had been our first! Despite a difficult market, you were able to complete the sale of our home and we are grateful for all your efforts. We are sure that having an absentee seller made your task more complicated and we appreciate the support we could rely on to stage, sell, move and close. Anyone who works with you should trust that The MG Group is a strong team of professionals who will do everything necessary to ensure a successful outcome for both the Seller and the Buyer. Best wishes for your future success.

Carol & Hal W.

I was introduced to The MG Group via After interviewing a handful of realtors, both from acquaintance recommendations and HomeLight, I decided that John from The MG Group was the best fit for my particular needs. I was selling a 2-flat and had all the concerns that came along with the sale. Do I market to real estate investors? Do I target buyers that are looking to have a tenant to support their mortgage? Can we present it as a “convert back to a single-family” home? Two-flats and smaller multi-units are nothing out of the ordinary in Chicago’s near Northwest-side, however, my building was closer to the burbs in an area that was predominantly single-family homes. I felt that my realtor needed to be able to understand my particular situation to help make this sale successful. My initial meeting with John addressed most of my questions and provided me with guidance that I felt comfortable accepting. After a brief conversation, I felt that he knew the area where I had grown up about as well as I did, and certainly much better from a real estate perspective. John’s recommendations on what type of property enhancements were needed, pricing, and market timing all worked out perfectly. Along with the full support of the entire MG Group staff, at no point in time did I feel like something was not being handled or taking longer than it should. Due to The MG Group’s teamwork and market knowledge, I truly feel that I was able to sell my property in a tight timeframe while maximizing my profit. I have zero inhibitions with recommending The MG Group, especially John Dasdelen, and plan on reaching out to them in the near future as my family looks to up-sizing our home.


This was my fifth transaction with the MG Group—or as my husband and I now refer to Mario and Haakon—the dream team. We embarked on a total gut rehab in late 2017 that, as often happens with construction, took much longer than expected. However, there is no doubt that the deal would not have gone through without Haakon running point and shepherding all of the actors involved. The MG Group guided us from our initial offer through close with probably—no exaggeration here—a million emails, calls, and meetings with the sellers in between. I am confident we could not have obtained our dream home without the MG group. The support offered from the entire team, including immediate feedback after showings, input regarding the construction process, recommendations for inspectors and the occasional therapy session, was remarkable. There is absolutely no better team to seek when buying or selling your next property. Mario, Haakon—thank you! It has truly been a pleasure.

Anna & Jim M.