Katelyn did a fantastic job helping us with our recent home purchase! My husband and I relocated to the Mass area from Colorado - we were unfamiliar with the areas surrounding Boston and knew we were going to have to buy a home in an extremely competitive market. I found Katelyn via Instagram and since our intro call, she went above and beyond for us. She took the time to understand what we were looking for, what our budget was, and provided honest feedback about what we could get in the current market. We flew out to look for homes for a week in person - Katelyn took us around as many towns as possible that fit our criteria and showed us many different homes. She was very knowledgeable of different home designs, potential problems, exteriors, furnace systems - you name it. She also provided honest feedback about each home, so we knew we could trust her opinion. Our in-person offers were turned down, so we had to buy sight unseen. Katelyn continued to show us homes virtually - either Facetiming us live or taking a million videos/photos and uploading them to a Google drive. She also took videos of the surrounding streets so we could get a feel for the neighborhoods. Katelyn ultimately found our future home for us - new construction, under budget, and in a quiet neighborhood within 30 mins to the city. She got us in to see the house as soon as possible. We knew the property was a gem, and Katelyn helped us write a very strategic offer (while even keeping the inspection clause in there :)) which got us the house in a multiple offer situation. Since then, Katelyn has continued to be a resource for us, answering random questions or providing recommendations for all things Boston. Katelyn is smart, dedicated, and hardworking, and I would highly recommend her for all your real estate needs. read more

As a first time home buyer in Boston, my husband and I couldn't recommend working with anyone else but Katelyn! 1. She is so knowledgeable in the space (both her parents are in the business as well so it is in her blood) and she made the process seamless and could answer any (and the many) questions we had. 2. This girl has drive!! She will outwork anyone! She will work no matter what- she actually viewed houses with us on holidays like Easter to make sure we saw all the houses we wanted. She works early mornings, late evenings, on vacation - she is always on it and works harder than anyone I know. 3. She is so passionate. She genuinely loves what she does and she is amazing at it. Because of her expertise we were able to secure a home on just our SECOND offer in a very competitive market!! Her negotiation skills are unmatched - she thinks of things we wouldn't of ever thought of throughout all steps in the process. Our offer beat the competition even with us offering a lower $ amount because of her expertise in writing a personable letter. She also was able to negotiate us additional $$ credit in the P&S agreement. 4. She is so positive. This process is daunting and she always made it fun and made sure to check in on us regularly throughout the process to see where our heads were at and how she could help. She genuinely cares about her clients. 5. She has a network - she helped connect us with an inspector, a general contractor, a lawyer, anything we needed she knew reputable people to connect us with. Whether you are buying your first home or your tenth home - we couldn't recommend Katelyn enough!! We wouldn't work with anyone else!! read more

Katelyn is an AMAZING real estate agent!! I HIGHLY recommend working with her. In fact, in the weeks since my home purchase, I haven't been able to stop telling everyone about Katelyn's skill, dedication, and enthusiasm. As a first-time homebuyer in the Greater Boston area, I connected with Katelyn in September of 2024, at which point I was still in my casual online searching phase. Katelyn was extremely patient with me as I navigated the decision, staying connected with me throughout the winter and continuing to educate me about the process and the market. In March 2025, we planned a week to kick the search into gear, when suddenly I saw the home I had been waiting for. Although we had yet to meet in person, Katelyn immediately sprang into action -- within one Saturday afternoon, she had worked with me to prep potential offers for a showing the next morning. While still at our showing that Sunday morning, with 30 minutes until the offer deadline, Katelyn constructed a winning offer in a multiple-offer scenario in the very competitive town of Belmont. The speed at which she applied her deep expertise and consulted with her vast network of colleagues in this EXTREMELY short window of time was truly astonishing -- and is why I keep talking about her to everyone I know! Throughout the process, Katelyn also connected me with other amazing professionals who supported me at different points along the homebuying journey. Since we've met, Katelyn has been extremely responsive and supportive, and her passion and enthusiasm shine at every step of the process. In summary, I HIGHLY recommend working with Katelyn!! read more

As a first time home buyer, it was truly a pleasure working with Realtor Katelyn E! She is a strong, tenacious buyers agent in MA and knows her stuff. I have known Katelyn since Middle School and we kept in touch over the years. From the very beginning when purchasing a home was just a thought, Katelyn was always there to answer any questions I had and included me in her first time buyer seminars which were super informative. When I was finally ready to purchase my first home in April 2025, it was natural to call Kate. Within 2 days of getting my pre-approval, she showed me my first townhouse. Although it was the first house I looked at in person, I knew it was the perfect home for my son and I. Kate immediately prepared to help me purchase the home. We submitted the offer the next day and boom it was accepted same day. She quickly connected me to other industry professionals including a home inspector, insurance agency and a real estate attorney. She was also able to negotiate money off for me after the home inspection and again at the final walk through when the home was not in perfect condition before closing. Kate is truly passionate and enthusiastic in what she does and makes it look so easy! She is also willing to move as quick or as slow with the process as you are comfortable with. I highly recommend Kate for anyone looking to buy a home in the greater Boston area or the suburbs. Kate will have your back and best interest read more

Katelyn did a wonderful job helping me purchase my first condo! As a first time homebuyer, I was nervous and unfamiliar with the process. From the beginning, she was very friendly, quick to respond, and readily available. Within hours of connecting, Katelyn and I did a home buying consultation where she explained and guided me through the whole process. She set up a personalized MLS search and was able to show me homes the same week. After Katelyn helped me find the condo I loved, she was able to very quickly write up a comparative market analysis (CMA), and submit an offer. Because of Katelyn, my very first offer was accepted! She held my hand through the homebuying process and was even willing to jump on a call at night to answer my questions. She has a huge network of professionals from home inspectors to insurance agents to attorneys, and they were all just as fantastic to work with. Katelyn was very kind and drove me all around the greater Boston Area from Chestnut Hill to East Boston. She has so much knowledge of the Boston real estate market, knows each neighborhood so well, and often points out good restaurant recommendations and fun things to do. It is obvious from her enthusiasm and expertise that she loves her job. I highly recommend Katelyn to anyone looking for a real estate agent in the Boston area! read more

Working with Katelyn was the BEST decision we made during our home search. Over the course of several years, she helped us explore a wide range of neighborhoods throughout the Boston area and patiently guided us through every stage of the process before ultimately helping us purchase a new construction condo in Quincy. Beyond her expertise, Katelyn was simply a pleasure to work with. She made what can often be a stressful and overwhelming process, especially as first-time buyers, feel enjoyable, manageable, and exciting. She was always available to answer questions, offer thoughtful advice, and help us navigate important decisions with confidence. Katelyn is incredibly responsive, deeply knowledgeable, and genuinely loves what she does, and that passion shows in every interaction. She's a fierce advocate for her buyers, pays close attention to the details, and consistently goes above and beyond for her clients. We always felt like she had our best interests at heart and that we had an experienced professional in our corner every step of the way. We can't recommend Katelyn highly enough. Her expertise, professionalism, and unwavering commitment to her clients make her an exceptional partner throughout the home-buying journey. We are so grateful we got the key with Katelyn E.! read more

Katelyn is amazing! She's helped us purchase our townhome condo in East Boston as first time home-buyers! She's a local Eastie resident and agent that knows her stuff. We were referred to her by a colleague; we had just found a property that we loved zillowing, and she was ready to jump right into our search with us. She was super available for all of our questions, and very thorough in walking us through the home-buying process. You can tell she has a passion for real estate and helping first time buyers. She provided us with a great presentation and overview of the process, which is not an easy one to navigate. We had our eye on one particular place, and she made sure to take us to multiple listings before we put in an offer to be super sure we knew what we were looking for and what was out there! She helped get us connected with loan officers to shop our rates and she also connected us to an amazing home inspector. Then after the inspection she helped us with finding a local plumber and carpenter that both quickly quoted us for repair estimates for our post inspection negotiations. Katelyn knows her stuff and is very well connected in East Boston. I'll be referring her to everyone I know! read more

My husband and I recently moved here from out of state. With such high rent prices, we decided to purchase a condo. We are seasoned at real estate transactions; however, we don't know the Boston market. Finding Katelyn has been a true blessing! She is hands down the best agent we have ever worked with! First, she is from the Boston area and knows the area well. She understood our wants and needs and helped us pick an area we knew nothing about (South End). As it turns out, it was EXACTLY what we were looking for! Second, she was great at negotiating the price of our new condo. She knew where we wanted to be price wise, and she did a phenomenal job negotiating with the seller's agent! Lastly, she was always responsive and incredibly helpful navigating this crazy Boston real estate market! She was quick to text or call whenever we had ANY questions or concerns. Honestly, it doesn't matter how many times you purchase property, it can still get stressful. Katelyn was informative and great at taking doubts and stresses away. The transaction from beginning to end was smooth, fast and easy. Katelyn is so great at what she does, and it's obvious she loves what she does! We 100% recommend her! read more

Dylan and I started working with Katelyn in September 2022 after falling victim to an apartment scam. After initially hoping to find an apartment in the Holliston area, Dylan and I decided to move home and start saving for a house, and by the end of November we were ready to start looking at houses. After five rejected offers and in a very low inventory market, Katelyn helped us secure a home in Milford that had gone "back on the market" only 2 days prior with a competitive offer and 30 day close. Despite all the ups and downs of offering on homes over the course of four months, Katelyn made the process feel seamless. Katelyn worked tirelessly, helping us find homes to look at within our budget and in our desired towns. Katelyn has such a bright personality and positive spirit and is so knowledgable about the process of buying a home, particularly for first time home buyers. Katelyn worked hard to get us into houses as soon as possible for showings and always helped us write competitive offers. I highly recommend using Katelyn, especially if you are looking to buy a home in the Metrowest area! Thank you for helping us find our home! read more

Katelyn was a wonderful real estate agent to work with on my recent home search in Boston! I looked for quite awhile before I finally decided what I wanted, and she was patient throughout the whole process. Katelyn took the time to understand what I was looking for and helped me narrow down my search along the way. Once she showed me East Boston and the opportunities I could have there I knew it would be the perfect spot. She even introduced me to Eastie Gals - a wonderful group to connect and meet other women in the area. I really appreciated the community Katelyn was working to build in East Boston! When I finally found a condo in East Boston she worked diligently to get me the best price and get my offer accepted - even with multiple other offers! Once the offer was accepted she wasted no time helping me find tenants for my previous condo in Fenway, and was able to find tenants in about two days. This was comforting knowing I had this taken care of and I could move into my new home without any concerns. She did a great job and I can't wait to work with her again in the future for all my Boston real estate needs! read more

I started my first-time housing search with Katelyn in mid to late March thinking that I would be entering the housing market with many months of hitting the ground and coming up against the very stiff competition. To my surprise, I found a home on the second showing weekend and first offer! If it wasn't for Katelyn's amazing skills and tactics of securing an accepted offer I don't think I would be sitting in my home right now! Katelyn has shown a tremendous amount of knowledge as we walked through potential houses showing us what to look for with finishes and nuanced red flags that the average buyer wouldn't be looking at. As a first-time home-buyer, this was so crucial for us! Katelyn has shown her workhorse nature to us by messaging us through every detail of the negotiation and at times losing sleep to guarantee the deal would be accepted. I am so grateful to Katelyn for making this expedited home-buying process so streamlined and so well supported. The cherry on top was Katelyn's lovely personality and ease to form a productive working dynamic. Please consider her for your next home-buying/selling experience! read more

I can't recommend Katelyn enough! As a first-time homebuyer, I was nervous about navigating the process, but she made the entire experience feel so much easier and less overwhelming. She walked me through every step of the way, always took the time to explain things clearly, and was incredibly knowledgeable throughout the entire process. She was highly communicative, extremely responsive, and always accommodating. Most importantly, she really listened to my preferences and made sure I felt heard and supported. She consistently went above and beyond to make sure everything stayed on track and that I felt confident in my decisions. She also had fantastic recommendations for movers, inspectors, mortgage lenders, and other professionals, which made the entire homebuying process so much smoother. Beyond being an excellent realtor, she is genuinely kind, thoughtful, and caring. I always felt like she truly had my best interests at heart. I'm so grateful to have had her by my side for such a major milestone, and I would absolutely recommend Katelyn to anyone looking to buy or sell. read more

Katelyn was super helpful in connecting me with my finance team, as well as showing me smart, appropriate options in the Boston neighborhoods of my choice. When touring showings, I learned so much and was able to make an informed decision about what worked best for me for my first ever condo. Ultimately when a listing she had became an option, nothing beat it! I am now in the CUTEST most adorable condo ever that fits my needs and my budget comfortably. As a first time homebuyer using local assistance programs, Katelyn made sure I was on track and kept me well connected with my finance team and all the necessary paperwork. Shoutout to Rich who also assisted to avoid any seller/buyer representation conflicts. At every step and every turn, Katelyn had a wealth of knowledge, experience, and patience- always keeping me in the loop and making sure my questions were answered and I never felt confident in the process! 10/10 would recommend for anyone looking to enter the ownership market in Boston!! read more

Katelyn helped me purchase a multi family investment property and at the same time, rent out two units as apartments. It was a bit of a complex situation with all the timing, documentation, and logistics needing to work out for the mortgage requirements and closing timing, and Katelyn was so helpful in coordinating all of the different pieces and helping me navigate the process with confidence. As a buyer's agent, she was super responsive, acted really quickly during a very competitive offer period, had excellent communication and follow-through with me and the seller's agent and mortgage team, to make sure everything aligned perfectly. She has helped with every step of the rentals too, from initial marketing and listing through move-in. Katelyn is so passionate and competent, she is the kind of person you can really trust to have your back and be with you at every step of the process. I was nervous going into the process but she helped me feel confident and get through every step smoothly!! read more

Katelyn was absolutely amazing to work with! Being first time homebuyers, we wanted to work with someone who was passionate and knowledgeable about real estate and knew the area very well. From the start we felt like a priority. She was extremely transparent about potential difficulties, market trends, and offer winning strategies throughout the entire home buying process. My fiancé and I were able to secure our forever home on our second offer with Katelyn, while she was in Croatia, myself in Australia, and my fiancé back home in Mass. The process is challenging and overwhelming as is, but the dedication she provided us while being in 3 different time zones truly says enough about how much she loves real estate and is an unmatched agent! All of her connections are just as outstanding as she is. Forever grateful for her patience, attention to detail, professionalism, and just genuine care for everyone she works with. HIGHLY recommend working with her!! read more

I worked with Katelyn earlier this year to purchase a condo property in East Boston. The overall experience was absolutely fabulous and I couldn't recommend her enough. As a first-time buyer, I had tons of questions throughout the process and Katelyn was highly responsive, super knowledgeable, and made me feel super comfortable at all stages. As a bonus, she's a fellow East Boston resident so knows the market really well and was able to give me lots of great advice. Since I closed on my purchase Katelyn has gone well above and beyond her "required" role to help me navigate and resolve some new construction property challenges. It's evident how much Katelyn takes pride in her work and cares about her clients and making sure the have the best possible experience through the home buying process, and I truly can't thank her enough! I'd highly recommend Katelyn to anyone looking to buy or sell in Boston or the surrounding areas. read more

After months of our unit sitting on the market vacant, we were referred to Katelyn directly - within days she came over, to take videos and photos, meet us and learn the unit. She then provided is comparable and very candid pricing suggestions. She gave us the blunt opinion that price was too high, helped us determine a price we were comfortable with. Within the week had private showings set up & a public open house. All summer we had 0 showings on the unit. But within the week she had several applicants and helps us organize the tenants and lease. She was communicative with us and the tenants and their real estate agent. She helps us draft a fair lease we were comfortable with and even helped us think of some additional terms we wanted in there. I highly recommend Katelyn E. Sullivan if you're a landlord looking to secure a dependable tenant in your investment property. Katelyn goes above and beyond. read more

Katelyn helped me navigate selling my Watertown property... she answered questions for years leading up to listing it. Katelyn gave me property analyses, gave me tips to get it show ready. When it did not sell in the slow fall market 2025, she helped me re-position and sell it in the spring, for top dollar, over asking with multiple offers. Selling was strenuous with market highs and lows and nervous first time buyers, but Katelyn helped see the sale through and was always readily available. She helped with staging and other creative ways to market the property. She worked ethically and professionally. And Helped me navigate the process of being a first-time seller. It's a very smooth mutual trustworthy client-agent relationship, Katelyn has worked professionally, intelligently and diligently every step of the way to represent me. I couldn't be happier! read more

Katelyne is an absolute rockstar. We reached out from out of State to request assistance in getting an apartment within a one month turnaround. Katelyne was immediately responsive and within 24hrs, set us up with MLS & a planned weekend of showings. She picked us up & took us to a ton of locations around Boston. She was extremely knowledgeable & patient in answering all of our questions & corresponding with agents, etc. She listened intently to all of our requests & ended up finding us an apartment in a wonderful neighborhood with our own private backyard for our dog. We look forward to working with Katelyne during our home buying process as well. We are so grateful for Katelyne & appreciate everything she's done for us so far! read more