Verified record
Katelyn E. Sullivan is a Coldwell Banker Realty agent based in East Boston who has become the name greater-Boston first-time buyers get passed along to — client after client mentions being referred to her by a friend, a mortgage company, or a city home-buying course before closing on their first place. Her Massachusetts real estate broker license is active with the state registry. The track record runs to 122 reviews from 2021 to 2026 across three sources, almost all five stars, most describing first purchases in East Boston, South Boston, Natick and Wakefield. Reviewers consistently point to the same things: she walks clients through each step, negotiates competitively in a tight market, and stays in touch for months before someone is ready to buy — one Natick buyer said she kept following up after a November 2025 referral until the right listing came along. Many clients work with her alongside her mother, Diane B. Sullivan, as a mother-daughter team handling both buyer and seller transactions together. Her work extends past a standard purchase. In a January 2025 review, a client described her guiding a multi-family investment purchase while simultaneously renting out two units, coordinating mortgage and closing logistics; in a May 2025 review, another described her staging and prepping a listing, arranging professional photos, and recommending a handyman for repairs before it sold. She is also known locally as the founder of Eastie Gals, an East Boston women's community group, and in an August 2024 review a client noted her as a '30 under 30' industry award winner. The one discordant note: a March 2026 one-star review said the client had explicitly instructed Katelyn not to share the home's key code with any third parties, including inspectors, and to personally accompany an inspector who needed to retrieve equipment left in the basement — the review describes a dispute over how that instruction was handled. It stands apart from an otherwise consistent history of buyer-side praise, but property access is worth being explicit about upfront. For a first-time purchase, a competitive-market negotiation, or a Boston-area sale that needs staging and prep, Katelyn Sullivan has a long, specific history to point to. Given the one access-related complaint, it's worth confirming in writing how showings, inspections and key access will be handled.
As a first-time homebuyer, I couldn’t have asked for a better realtor. From start to finish, Katelyn was incredibly knowledgeable, responsive, and patient throughout the entire process. She took the time to explain every step, answer all of my questions, and made what could have been a stressful experience feel manageable and exciting. Her communication was outstanding—I always felt informed and never had to wonder what was happening next. Beyond her expertise, she was personable, approachable, and genuinely invested in helping me find the right home. I always felt like she had my best interests in mind. I highly recommend Katelyn to anyone looking to buy a home, especially first-time buyers. Her professionalism, guidance, and support made all the difference, and I am so grateful to have had her by my side throughout this journey.
Katelyn helped us buy our first home. She advised us on timing, offer strategies, and helped negotiate. Highly recommend!
Katelyn helped us with our first home purchase. She advised us on timing, offer strategies, and helped negotiate. She was enthusiastic, knowledgable about the market, and offered advice that helped us make the best decision we could in time sensitive moments.
Katelyn helped me purchase my first home! I met Katelyn through a neighborhood group the Boston area and she seamlessly helped me with all the details and steps in purchasing a home as a first-time buyer. Throughout the entire process Katelyn answered all my questions and was able to provide excellent recommendations and connect me with a knowledgeable lender, inspector, and attorney. Katelyn works tirelessly for her clients and truly has their best interest at heart. I was comfortable during the process knowing that she had my back the entire way!! I am incredibly happy with how things went and where I am living today, all thanks to Katelyn 😊
As a first-time home buyer, Katelyn was absolutely amazing at helping me navigate the process from start to finish! I met her in East Boston at one of her listings and from there she helped me with showings and open houses in multiple different neighborhoods throughout the Boston area. She was extremely knowledgeable, always readily available to answer any questions I had, and had so many connections within her network that she was able to provide fantastic recommendations for home inspectors and attorneys. Thanks to Katelyn I was able to purchase my first condo, and she helped make the process as smooth and straightforward as possible. I highly recommend Katelyn to anyone looking to buy a home in the Boston area!
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1 change recorded — last scanned Jul 29, 2026.
Repeat clients4.8
Verified license4.8
Sells above asking4.7
Fast sales4.6
Decades of repeat clients4.6
Above-ask sales4.4
