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Susan Mattern

Susan Mattern



The woman behind the success of Let’s Open Doors

Let’s Open Doors was established in 2015 by Susan Mattern – A renowned Real Estate Agent who grew up in West Chester, PA. Today she is one the most trusted Realtors serving Southeastern PA and Northern Delaware. Her expertise ranges from helping first time home buyers, investors, moving up and downsizing clients. Since the company’s inception, Let’s Open Doors has gained high recognition and has soared by assisting numerous clients in fulfilling their dreams of owning a home.

Susan is known for her loyalty, obedience, confidentiality and caring nature. Her prime focus lies in luxury real estate properties, small-scale commercial properties, and various investment properties. Susan’s involvement in several networking groups has helped her build her sphere of influence and expand her networking opportunities throughout the Philadelphia area, along with her participation in several Real Estate Training courses has increased her business knowledge.

Susan is passionate about her career and ensures each client’s needs and wants are adhered to in the best possible way. You can rely on her as your trusted REALTOR to get you the best possible deal based on your budget and expectations. She puts her best foot forward to provide clients with a smooth and streamlined experience. Susan will be your professional coach to get to your final goal and help you throughout the buying and selling process. Then why wait? Reach out to us for all of your Real Estate needs.

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What Clients Are Saying

Susan was great so helpful in buying my first home. Also the best realtor I had. She was always available at anytime to take my calls. Susan made everything so easy and simple for us. I would definitely recommend her to anyone.



Susan asked the right questions to find out how to help us find the right property. She went above and beyond to provide us with information needed to make a good decision and get the right fit for our needs. We are happy with our purchase and appreciate her help. We would do it all over again.



Highly recommend! Always available for any questions or help, willing to help to find the right home! We really appreciate all your help during our process to find our home! Thanks Susan!!



My wife and I purchased a house in PA, coming from WI. After spending two days viewing properties with us we put an offer on a house. After inspections this deal fell through, but Susan continued to view houses with us on Zoom so that we could view properties without having to come out to PA again. It was reassuring for us to know we had someone on the ground in PA to view houses so that we weren't buying alone after only viewing properties using online resources. Susan was also a vital resource during the municipal inspection process for us as we were unable to occupy the property we had purchased (owing to an uncommon municipal inspection). Susan worked to resolve the issues we had with the municipality and get us into our house.


Derrek Grunfelder-McCrank