ERA Key Realty Services
After many years in the accounting industry, I followed my passion and became a full-time Realtor® in 2005. The attention to detail and organizational skills that were essential in accounting quickly became valuable tools in my real estate career—benefiting not only me, but most importantly, my clients.
To ensure I offer the highest level of service, I’ve made professional development a priority. I hold a Broker and Real Estate Instructor License in Massachusetts and a Salesperson License in New Hampshire, along with numerous advanced designations:
As a lifelong resident of the Burlington/Billerica area, I’m deeply familiar with the local market. Whether you’re buying your first home, upsizing, downsizing, or investing, I’m here to guide you every step of the way. My clients consistently say they appreciate my patience, professionalism, and ability to make the process less stressful—and even enjoyable.
What Clients Are Saying
“I was more than impressed with her attentiveness, responsiveness, knowledge, and ability to help support me throughout the process.”
“I was pleasantly surprised to realize Cathy was just as invested in my search as I was. I couldn’t have asked for a more hard-working and efficient Realtor.”
“As first-time homebuyers, we didn’t know the process well. Cathy explained every single step, was quick to respond, and incredibly patient.”
“She is honest and sincere. She gave prompt feedback after every showing, with detailed comments from prospective buyers.”
“Cathy was instrumental in helping us sell my 90-year-old mother’s house. She advised us on smart upgrades, handled the process with professionalism, and treated my mom with such kindness and respect.”
(You can read more reviews by clicking on the Testimonials tab above.)
Credentials & Memberships
I’ve attended the University of Massachusetts–Lowell and Northeastern University. I'm also an active member of:
These affiliations help me stay up to date with market trends and industry best practices both locally and nationally.
Let’s Get Started
Whether you're buying or selling, I’m here to help you navigate one of life’s biggest decisions with confidence. I look forward to working with you!
A Very Happy Buyer!
I have had the pleasure of working with Cathy for both selling and buying a home, and I truly can't imagine navigating the process without her expertise. Cathy is incredibly knowledgeable about the market, providing insights that are both valuable and timely. She coordinates every detail meticulously, ensuring I get the most for my money while explaining each step clearly. Her professionalism in dealing with all parties involved was greatly appreciated, making the entire experience seamless. Cathy's dedication and commitment to her clients are evident in her efforts to ensure everything goes smoothly and without a hitch. I can't recommend her highly enough!
Posted by C H (Buyer) on 10 May 2025
Attention to Detail!
Cathy’s attention to detail and exceptional communication skills has kept us on track and up to date every step of the way. This is our 2nd house that we’ve bought using Cathy as our agent. We are in the process of selling our 2nd house also using Cathy. We highly recommend choosing Cathy to represent you on your next residence change. Ed B March 2025
Highly recommend !
Cathy is amazing and very knowledgeable. She explained the process step by step and put my mind at ease when I got over whelmed. I am very happy that I chose Cathy as my realter, I highly recommend Cathy to anyone who is looking into buying a house. Cathy went above and beyond through this process. Stacy A Oct 2024
This was my second time working with Cathy. She helped us navigate through several obstacles standing in the way of our home sale. Dealing with the new government regulations (Fannie Mae) and the changes made to the real estate industry right in the middle of our sale. She guided us through the process with ease and made a difficult process easy to handle for us. I would recommend Cathy to anyone looking for a real estate agent! Scott W Oct 2024
Cathy is incredibly knowledgable and professional. She did an exceptional job of helping guide us in the home buying process. I would recommend her to anyone looking to purchase a home in the area.
We had the pleasure of working with Cathy as our real estate agent, and we couldn't have asked for a better experience. Cathy is incredibly knowledgeable about the market and provided invaluable insights throughout the entire home-buying process. She was always super responsive to our questions and concerns, no matter the time of day.
Cathy made sure we were comfortable with every step and never pressured us into making decisions. It truly felt like she had our best interest at heart. Her professionalism, patience, and dedication made the entire process smooth. Thank you, Cathy!
Heny & Joyce
Highly Recommended !!!
When it came time to sell our home, my wife and I wanted to be sure we worked with a realtor that we both felt comfortable with. We were concerned because we built our home with the help of our parents when we were kids, and had spent the last 34 years of our lives in our home.
After our initial consultation with Cathy, I asked my wife what she thought, my wife responded “I like her”. I told my wife I liked Cathy as well. When Cathy returned with her market analysis, my wife and I were very pleased with the level of detail Cathy provided. After Cathy left our home for the second time, I asked my wife again what she thought, my wife responded “I think we selected the right realtor for us”. I told my wife I agreed.
Throughout the entire sales process, Cathy always made herself available to us. She also demonstrated an extremely high level of sincerity toward us, understanding that we were about to leave our only home. This is something we sincerely appreciated.
If you’re contemplating the sale of your home, we highly encourage you to reach out to Cathy. You will not be disappointed.
Doug & Sandra K (Seller Jan 2024)
Not our first time with Cathy
We have worked on many home sales/purchases with Cathy over the years. Her attention to detail is amazing and makes a seller/buyer worry less about the process.
Review submitted by Nancy B (Seller) on 01 Aug 2023
Had a fantastic experience with Cathy! The process is so challenging, especially for a first time buyer. Cathy made the process simple and easy to manage. Matt F (July 2023)
"Your offer wasn't even the highest, but your agent was what got you the home" was the comment from the Seller's Agent shortly after getting the keys to our new home. My partner and I were relocating from MN to MA and we were lucky enough to get Cathy as our agent. Cathy was very supportive of our situation by taking us on virtual tours of potential homes, pointing out the pros/cons of each home, and quickly getting out offers we wanted to make. Cathy is extremely knowledgeable on the industry and goes above and beyond for her clients. We will absolutely be calling Cathy when we need to buy/sell our next home.
Review submitted by Jacob W (Buyer) on 28 Jun 2023
It was time to sell the family home that was in a trust after 93 year young dad passed away in the nursing home, just months earlier. I was not looking forward to the whole process. My attorney gave me Cathy’s business card. I never expected her services to be so fantastic and professional! She quickly developed a market analysis plan after touring the house with us. This gave us the knowledge of the local RE market at this time. We were able to focus on cleaning out the house and preparing it for the market. She was so patient, as this was a major task after our family buying the house new over 60 years ago. Once it was on the market, it only lasted 3 day. Over 25 offers came, mostly over asking price. She held a Zoom call to go over the offers, since two of the 3 co-trustees were out of state. After the best offer was accepted, Cathy was there every step of the way with inspections, etc, and keeping us informed of buyers steps in the process. She promptly answered phone calls, text messages and emails never letting anything hang. We highly recommended to anyone who plans on putting a home on the market, and feel if you were looking for a home she be just as fantastic and professional. One last thing, she constantly thanked me for getting my tasks done she requested that helped with the sale as I was the local contact person for the estate! LS April 2025
Outstanding experience!
We were referred to Cathy Lomasney by Rocket Homes, and from our very first interaction to the closing and beyond, Cathy consistently exceeded our expectations. Her dedication and thoroughness were evident from the outset. While we were searching for our new home, Cathy expertly helped us filter out properties that didn’t suit our needs by conducting thorough research and highlighting aspects we hadn’t considered. This saved us a significant amount of time and effort by allowing us to skip unsuitable options. Occasionally, Cathy visited properties ahead of us to identify and point out potential concerns that could affect our decision. Once we found the house we loved, she expertly guided us through the offer process and negotiations, ensuring we achieved the best possible outcome. Her coordination of necessary inspections was seamless, making it feel at times as though she doubled as a home inspector. Throughout the entire process, Cathy maintained active communication with our lender, closing company, and attorney, ensuring that everything proceeded smoothly and we closed on time without any hitches. This wasn’t our first home purchase, but working with Cathy made it a far superior experience compared to our previous home-buying endeavors. We’re writing this review from the comfort of our new home, which we absolutely adore, and we know that without Cathy Lomasney’s invaluable assistance, we wouldn’t be enjoying it as much as we are. We are immeasurably grateful for her exceptional service and support! Simon S Dec 2024
Highly recommend !
Cathy is amazing and very knowledgeable. She explained the process step by step and put my mind at ease when I got over whelmed. I am very happy that I chose Cathy as my realter, I highly recommend Cathy to anyone who is looking into buying a house. Cathy went above and beyond through this process. Stacy A Oct 2024
Cathy is extremely knowledgeable and responsive. She has helped us through all aspects of the buy and sell process. A joy to work with.
Unlike other agents I’ve spoken to recently, Cathy never made me feel like she had to rush to a meeting or something. She knows the area very well and knows how to price a home. She gets back to a text in a timely manor. She had no problem keeping my daughter in the loop on everything as I don’t know the first thing about real estate and my daughter does. Any say enough about Cathy and if you’re in the market to buy or sell talk to her, you won’t be disappinted!!
Posted by Donna L (Seller) on 01 Aug 2024
Cathy was very helpful to my wife and I. We were relocating from Texas and she was able to help us navigate the differences in the housing market in New Hampshire and Massachusetts. When we were unable to see something in person Cathy was more than willing to video call us and walk us through the homes. She is very detail oriented and is on top of her game. TK & LK
Excellent job
Cathy helped me to sell my property very professionally. She communicated promptly and helped to fix issues. I appreciate her all effort. D. Kim (Seller) Aug 2023
Looking for a hike was challenging in the 2023 market. Cathy provide significant help understanding the market and crafting realistic expectations. She was to communicate with; always a quick text or email away. When I was busy with work or family problems, Cathy was able to fill the gaps to keep the process moving forward!
Review submitted by Matt F (Buyer) on 8 Jul 2023
Extremely Helpful & Professional!
Cathy was extremely helpful and professional. She gave her honest opinions about the properties, market, and offers; which was invaluable advice. She never pressured me to make a decision or offer. Cathy was easy to communicate with and helped facilitate the discussion with the bank or sellers agent when I was unable to due to work or family issues. Review submitted by Matt F (Buyer) on 6 July 2023
My wife and i had a wonderful experience working with Cathy. During open house walk throughs, Cathy would always provide detailed information on everything, even the smallest aspects of a house. Cathy always provided us with more than enough information to make offer decisions. I highly recommend Cathy as a realtor.
Review submitted by Saroj K (Buyer) on 19 Jun 2023
