My Bio

Mary Sue Mainella

Mary Sue is a real estate agent with Century 21 North East, located in Portland, Maine. She holds client service and commitment to their needs, at the highest level. Mary Sue served clients for over 30 years in the health insurance industry. This experience awarded her expertise in management, sales, service, training and underwriting both in Maine and New York. In 2000, she became self-employed as a Benefits Consultant for employers with 10-2500 employees. This solidified her skills that coincide with real estate: honesty, integrity, organization, attention to detail, artful negotiation and follow up and follow through

~  My mission goes beyond transactions; it’s about building trust. Because your home buying or selling journey deserves a partner you can rely on.~

Mary Sue was raised in Portland. Having wonderful childhood memories of summers on Long Island, Maine, she and her family chose to live in a seaside village on Long Island, New York, which very much reminded her of Maine. After 12 years in New York City and Long Island, Mary Sue and her family moved to Maine.

Mary Sue became an agent with Century 21 North East in 2019. She has since developed a flourishing career and reputation amongst clients and other Realtors. To date, Mary Sue has closed just shy of $100,000,000 in residential sales.

  ~ ‘ It was an absolute pleasure working with you.  I wish there were many, many more agents with your skill set, win-win mode of operation!  Thank you for all that you did to bring this to a successful close! Your clients were lucky to have you as their advocate and agent. Hoping we can do this again soon!’  ~  Glenna – listing agent

Mary Sue has a tenacious work ethic and possesses both emotional intelligence and professional poise that is critical to be successful. She is in constant communication with her clients and guides them through the buying or selling process. She continually goes above and beyond the Realtor call of duty. Century 21 North East provides Mary Sue with the cutting-edge technology needed to service her clients’ needs and stay on top of her game.

~ ‘Mary Sue was amazing to work with. In my opinion, she went above and beyond. She even helped   with some finishing touches to make my house look better when it was listed. I appreciated her  responsiveness and attention to detail. Her market research helped me get a price that was above my  asking price. I would recommend Mary Sue to anyone who is looking for a realtor.   She’s a top-notch professional.’ ~ Kim D. Portland


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